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Author name code: brault
ADS astronomy entries on 2022-09-14
author:"Brault, James W."
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Title: Xgremlin: Interferograms and spectra from Fourier transform
spectrometers analysis
Authors: Nave, G.; Griesmann, U.; Brault, J. W.; Abrams, M. C.
2015ascl.soft11004N Altcode:
Xgremlin is a hardware and operating system independent version
of the data analysis program Gremlin used for Fourier transform
spectrometry. Xgremlin runs on PCs and workstations that use the X11
window system, including cygwin in Windows. It is used to Fourier
transform interferograms, plot spectra, perform phase corrections,
perform intensity and wavenumber calibration, and find and fit spectral
lines. It can also be used to construct synthetic spectra, subtract
continua, compare several different spectra, and eliminate ringing
around lines.
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Title: Expected progress based on aluminium galium nitride Focal
Plan Array for near and deep Ultraviolet
Authors: Reverchon, J. -L.; Robin, K.; Bansropun, S.; Gourdel, Y.;
Robo, J. -A.; Truffer, J. -P.; Costard, E.; Brault, J.; Frayssinet,
E.; Duboz, J. -Y.
2009EAS....37..207R Altcode:
The fast development of nitrides has given the opportunity to
investigate AlGaN as a material for ultraviolet detection. A camera
based on such a material presents an extremely low dark current at room
temperature. It can compete with technologies based on photocathodes,
MCP intensifiers, back thinned CCD or hybrid CMOS focal plane arrays
for low flux measurements. First, we will present results on focal plane
array of 320 × 256 pixels with a pitch of 30 μm. The peak responsivity
is tuned from 260 nm to 360 nm in different cameras. All these results
are obtained in a standard SWIR supply chaine and with AlGaN Schottky
diodes grown on sapphire. We will present here the first attempts to
transfer the standard design Schottky photodiodes on from sapphire to
silicon substrates. We will show the capability to remove the silicon
substrate, to etch the window layer in order to extend the band width
to lower wavelength and to maintain the AlGaN membrane integrity.
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Title: The CN spectrum from the infrared to the ultraviolet
Authors: Davis, S.; Wallace, L.; Brault, J.; Engleman, R.
2005cns..book.....D Altcode:
The diatomic molecular spectrum of the CN has been of interest to
physics and astronomy for many years. A book containing a comprehensive
analysis of the band spectrum of the Red System was the first major
publication by the Analysis of Spectra program at Berkeley, begun in
1959. Later, a finding list was constructed and made available on the
internet. The light sources were a carbon arc in air, a King furnace,
and an electric discharge in cyanogen gas. The spectrometer was a
Paschen mounted concave diffraction grating. We are now extending our
analysis to cover the region from 3700 to 29,600 cm-1 (2700 to 338
nm). It includes both the Red and Violet systems. The light sources are
a carbon arc, King furnace, acetylene flame, hollow cathode, inductively
coupled plasma, electrodeless discharge tubes containing isotopic
mixtures, and a nitrogen afterglow discharge tube. The spectrometer
is the Fourier Transform Spectrometer (FTS) at the McMath-Pierce
telescope on Kitt Peak. The variety of excitation of levels and
consequent intensities from the various sources is striking. All of
the spectra used here are available from the archives of the National
Solar Observatory.
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Title: The CN Spectrum from the IR to the UV
Authors: Davis, S.; Wallace, L.; Brault, J.; Engleman, R.
2004AAS...20518208D Altcode: 2005BAAS...37..388D
Acknowledgement <P />The National Science Foundation continues
to support this work through the National Optical Astronomical
Observatories. <P />The CN Spectrum from the IR to the UV <P />The
diatomic molecular spectrum of the CN has been of interest to physicists
and astronomers for many years. A book containing a comprehensive
analysis of the Red system was the first major publication of
the Analysis of Molecular spectrum program at Berkeley, begun in
1959. Later, a finding-list was constructed and made available on
the internet. The light sources were a carbon arc in air, a King
furnace, and an electric discharge in cyanogen gas. The spectrometer
was a Pashen mounted concave diffraction grating. We are now extending
our analysis to cover the region from 1800 to 31000 cm-1 (5600 to 320
nm). It includes the vibration-rotation spectrum as well as the Violet
system. The light sources are a carbon arc, King furnace, acetylene
flame, hollow cathode, inductively coupled plasma, electrodeless
discharge tubes containing several isotopic mixtures, and a nitrogen
afterglow discharge tube. The spectrometer is the fourier transform
spectrometer at Kitt Peak. We have identified 50 bands free enough
from blending to be analyzed. The variety of excitation of levels
and consequent intensities and line widths from the various sources
is striking.
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Title: Fourier transform spectrometry
Authors: Davis, Sumner P.; Abrams, Mark C.; Brault, James W.
2001ftsp.book.....D Altcode:
No abstract at ADS
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Title: New studies of the visible and near-infrared absorption by
water vapour and some problems with the HITRAN database
Authors: Belmiloud, Djedjiga; Schermaul, Roland; Smith, Kevin M.;
Zobov, Nikolai F.; Brault, James W.; Learner, Richard C. M.; Newnham,
David A.; Tennyson, Jonathan
2000GeoRL..27.3703B Altcode:
New laboratory measurements and theoretical calculations of integrated
line intensities for water vapour bands in the near-infrared
and visible (8500-15800 cm<SUP>-1</SUP>) are summarised. Band
intensities derived from the new measured data show a systematic
6 to 26% increase compared to calculations using the HITRAN-96
database. The recent corrections to the HITRAN database [Giver et al.,
J. Quant. Spectrosc. Radiat. Transfer, 66, 101-105, 2000] do not remove
these discrepancies and the differences change to 6 to 38%. The new
data is expected to substantially increase the calculated absorption
of solar energy due to water vapour in climate models based on the
HITRAN database.
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Title: VizieR Online Data Catalog: New multiplet table for FeI
(Nave+, 1994)
Authors: Nave, G.; Johansson, S.; Learner, R. C. M.; Thorne, A. P.;
Brault, J. W.
1995yCat..20940221N Altcode:
We have recorded spectra of iron-neon and iron-argon hollow cathode
lamps in the region 1700A-5um (59,000-2000cm<SUP>-1</SUP>), with Fourier
transform (FT) spectrometers at the National Solar Observatory, Tucson,
Arizona, and Imperial College, London, UK, and with a high-resolution
grating spectrograph at the National Institute of Standards and
Technology, Gaithersburg, Maryland. The uncertainty of the strongest
lines in the FT spectra is less than 0.002cm<SUP>-1</SUP> (0.2mA at
3000A; 8mA at 2um). Pressure- and current-dependent shifts are less
than 0.001cm<SUP>-1</SUP> for transitions between low-lying levels,
increasing to 0.006cm<SUP>-1</SUP> for transitions between the most
highly excited levels. We report 28 new energy levels of Fe I and
revised values of another 818 levels. We have identified 9501 lines as
due to 9759 transitions in Fe I, and these are presented in the form
of a new multiplet table and finding list. This compares with the ~5500
lines due to 467 energy levels in the multiplet tables of Moore (1950,
NBS Circ., No.488 and 1959, NBS Tech. note 30). The biggest increase is
in the near-ultraviolet and near infrared, and many of the new lines
are present in the solar spectrum. Experimental log (gf) values are
included where they are available. A further 125 unidentified lines
due to Fe I are given. (4 data files).
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Title: The Infrared Spectrum of Neutral Sulphur (S I)
Authors: Engleman, R., Jr.; Brault, J. W.
1995ASPC...81..229E Altcode: 1995lahr.conf..229E
No abstract at ADS
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Title: Argon ion linelist and level energies in the hollow-cathode
discharge.
Authors: Whaling, W.; Anderson, W. H. C.; Carle, M. T.; Brault, J. W.;
Zarem, H. A.
1995JQSRT..53....1W Altcode:
Lines of Ar I, II, and III are identified in high-resolution Fourier
Transform spectra of a hollow-cathode source covering the range
222-5865 nm. Ar II and III level energies are extracted and compared
with earlier measurements. Selected Ar II lines suitable for use
as secondary wavelength standards are measured relative to precise
wavelengths of CO molecular lines.
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Title: A New Multiplet Table for Fe i
Authors: Nave, G.; Johansson, S.; Learner, R. C. M.; Thorne, A. P.;
Brault, J. W.
1994ApJS...94..221N Altcode:
We have recorded spectra of iron-neon and iron-argon hollow cathode
lamps in the region 1700 A-5 micrometers (59,000-2000/cm), with Fourier
transform (FT) spectrometers at the National Solar Observatory, Tucson,
Arizona, and Imperial College, London, UK, and with a high-resolution
grating spectrograph at the National Institute of Standards and
Technology, Gaithersburg, Maryland. The uncertainty of the strongest
lines in the FT spectra is less than 0.002/cm (0.2 mA at 3000 A; 8 mA
at 2 micrometers). Pressure- and current-dependent shifts are less
than 0.001/cm for transitions between low-lying levels, increasing
to 0.006 cm<SUP>-1</SUP> for transitions between the most highly
excited levels. We report 28 new energy levels of Fe I and revised
values of another 818 levels. We have identified 9501 lines as due to
9759 transitions in Fe I, and these are presented in the form of a new
multiplet table and finding list. This compares with the approximately
5500 lines due to 467 energy levels in the multiplet tables of Moore
(1950, 1959). The biggest increase is in the near-ultraviolet and
near infrared, and many of the new lines are present in the solar
spectrum. Experimental log (gf) values are included where they are
available. A further 125 unidentified lines due to Fe I are given. The
tables are also available in computer-readable form.
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Title: High-Resolution Fourier Transform Spectroscopy of the Meinel
System of OH
Authors: Abrams, Mark C.; Davis, Sumner P.; Rao, M. L. P.; Engleman,
Rolf, Jr.; Brault, James W.
1994ApJS...93..351A Altcode:
The infrared spectrum of the hydroxyl radical OH, between 1850 and
9000/cm has been measured with a Fourier transform spectrometer. The
source, a hydrogen-ozone diffusion flame, was designed to study the
excitation of rotation-vibration levels of the OH Meinel bands under
conditions similar to those in the upper atmosphere which produce
the nighttime OH airglow emission. Twenty-three bands were observed:
nine bands in the Delta upsilon = 1 sequence, nine bands in the
Delta upsilon = 2 sequence, and five bands in the Delta upsilon = 3
sequence. A global nonlinear least-squares fit of 1696 lines yielded
molecular parameters with a standard deviation of 0.003/cm. Term values
are computed, and transition frequencies in the Delta upsilon = 3, 4,
5, 6 sequences in the near-infrared are predicted.
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Title: A New Multiplet Table for Fe
Authors: Nave, I. G.; Johansson, S.; Learner, R. C. M.; Thorne, A. P.;
Brault, J. W.
1994astro.ph..4049N Altcode:
We have recorded spectra of iron-neon and iron-argon hollow cathode
lamps in the region 1700A -- 5um (59000 -- 2000cm-1), with Fourier
transform (FT) spectrometers at the National Solar Observatory,
Tucson, Arizona, U.S.A. and Imperial College, London, U.K., and with
a high resolution grating spectrograph at the National Institute of
Standards and Technology, Gaithersburg, U.S.A. The uncertainty of the
strongest lines in the FT spectra is <0.002cm-1 (0.2mA at 3000A;
8mA at 2um). Pressure and current-dependent shifts are <0.001cm-1
for transitions between low lying levels, increasing to 0.006 cm-1 for
transitions between the most highly excited levels. We report 28 new
energy levels of Fe I and revised values of another 818 levels. We
have identified 9501 lines as due to 9759 transitions in Fe I, and
these are presented in the form of a new multiplet table and finding
list. This compares with the 5500 lines due to 467 energy levels in
the multiplet tables of Moore (1950, 1959). The biggest increase is in
the near ultraviolet and near infra-red, and many of the new lines are
present in the solar spectrum. Experimental log(gf) values are included
where available. A further 125 unidentified lines due to Fe I are given.
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Title: Fourier-transform spectra of the A2 summation + -X2 Pi
triangle-open v = 0 bands of OH and OD
Authors: Stark, G.; Brault, J. W.; Abrams, M. C.
1994JOSAB..11....3S Altcode: 1994OSAJB..11....3S
This paper presents the results of experimental determination of the
Fourier-transform spectra of the OH and OD A(0)-X(0), A(1)-X(1),
and A(2)-X(2) bands using a hollow-cathode source, and iron
calibration standards. Better precision is obtained than from earlier
measurements. Molecular parameters and rotational term values have
been calculated from the new measured line positions for the A(sup
2)summation(sup +) and X(sup 2)Pi states.
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Title: Spectrum and term system of neutral nickel, Ni I
Authors: Litzèn, U.; Brault, J. W.; Thorne, A. P.
1993PhyS...47..628L Altcode:
Spectra of nickel, emitted from hollow cathode discharges,
have been recorded in the region 1700-55 000 Å (58 800-1800
cm<SUP>-1</SUP>). Fourier transform spectrometers were used above
1800 Å, yielding very high accuracy and resolution. The number of
classified Ni I lines has increased from 1071 to 1996. 289 of the
lines have been resolved in 2-4 isotope components. The term system
derived from the observations comprises 286 energy levels. The term
structure and the coupling conditions have been studied by means of
ab initio and parametric theory.
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Title: New Energy Levels in Ar II
Authors: Quinet, P.; Palmeri, P.; Biemont, E.; Brault, J. W.
1993PhRvA..49.2446Q Altcode:
No abstract at ADS
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Title: Solar Fourier transform spectroscopy (in Future Solar Optical
Obervations Needs, and Constraints 1978)
Authors: Brault, J. W.
1993inas.book..273B Altcode:
No abstract at ADS
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Title: Interference effects in reticon photodiode array detectors
Authors: Mount, George H.; Sanders, Ryan W.; Brault, James W.
1992ApOpt..31..851M Altcode:
A detector system incorporating the Reticon RL1024S photodiode array
has been constructed as part of a double spectrograph to be used to
study the earth's atmosphere from ground-based and aircraft-based
platforms. To determine accurately the abundances of atmospheric trace
gases, this new system must be able to measure spectral absorptions as
small as 0.02 percent. The detector exhibits superior signal-to-noise
characteristics at the light levels characteristic of scattered
skylights, but interference in the passivating layer causes problems
in achieving the required precision. The mechanism of the problems
and the solution implemented are described in detail.
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Title: Precision Fe I and Fe II Wavelengths in the Red and Infra-Red
Spectrum of the Iron-Neon Hollow Cathode Lamp
Authors: Nave, G.; Learner, R. C.; Murray, J. E.; Thorne, A. P.;
Brault, J. W.
1992JPhys...2..913N Altcode:
No abstract at ADS
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Title: Lifetimes, transition probabilities, and level energies in Fe i
Authors: O'Brian, T. R.; Wickliffe, M. E.; Lawler, J. E.; Whaling,
W.; Brault, James W.
1991JOSAB...8.1185O Altcode: 1991OSAJB...8.1185O
No abstract at ADS
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Title: CN vibration-rotation spectrum
Authors: Davis, Sumner P.; Abrams, Mark C.; Rao, M. L. P.; Brault,
James W.
1991JOSAB...8..198D Altcode: 1991OSAJB...8..198D
No abstract at ADS
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Title: Fourier Transform Spectrometer Observations of Solar Carbon
Monoxide. III. Time-resolved Spectroscopy of the Delta V = 1 Bands
Authors: Ayres, Thomas R.; Brault, James W.
1990ApJ...363..705A Altcode:
Time series of the 2100/cm Delta v = 1 absorption bands of CO at the
center of the solar disk and at the extreme limb have been recorded by
Fourier transform spectrometer. The photospheric 5-min oscillation
appears prominently at sun center. The peak-to-peak brightness
temperature amplitude is roughly 300 K, and the peak-to-peak Doppler
shift is roughly 1100 m/s. The 70 deg phase lag of maximum core
intensity with respect to maximum redshift for the strongest Delta
v = 1 absorptions is less than the 90 deg expected in the adiabatic
limit. No dominant four-minute signal in the line intensity like
that reported by Deming et al. (1984, 1986, and 1987) is found,
nor is evidence for extreme fluctuations on short time scales like
those proposed by Kalkofen et al. (1984). The strong Delta v = 1
lines exhibit systematic Doppler shifts of less than about 1 km/s,
contrary to the predictions of transonic redshifts if the CO 'clouds'
are associated with a dynamic cooling phase of the Ca II 'cell flashes.'
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Title: Unified set of atomic transition probabilities for neutral
argon
Authors: Wiese, W. L.; Brault, J. W.; Danzmann, K.; Helbig, V.;
Kock, M.
1989PhRvA..39.2461W Altcode:
The atomic transition probabilities and radiative lifetimes of neutral
argon have been the subject of numerous experiments and calculations,
but the results exhibit many discrepancies and inconsistencies. We
present a unified set of atomic transition probabilities, which is
consistent with essentially all recent results, albeit sometimes
only after critical reanalysis. The data consistency and scale
confirmation has been achieved in two ways. (i) We have carried out
some lifetime-branching-ratio measurements for a principal 5p level
and the associated 4s-5p transitions. These measurements have very
closely confirmed the accuracy of the results of recent independent
emission experiments. (ii) We have critically reanalyzed and revised
the literature data for the 4s-4p transitions, as well as utilized the
results of a similar critical analysis for the 4s-5p transition array,
to establish complete sets of absolute data for these arrays. We have
found these data to be mutually consistent from cross-correlation
checks between the two arrays, using recent literature data. Finally,
we have proposed renormalization factors for other argon transitions
based on this analysis.
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Title: Comprehensive transition probabilities in Mo I
Authors: Whaling, W.; Brault, J. W.
1988PhyS...38..707W Altcode:
Transition probabilities for 2835 lines in Mo I between 2548 and 10,565
A were obtained by combining radiative level lifetimes, excited level
populations measured in an inductively coupled plasma (ICP) source,
and emission branching ratios measured with the ICP source and a hollow
cathode discharge source. It is shown that the level populations in
the ICP source approximate a thermal distribution. It is also shown
that modern computer techniques convert a large amount of spectral
information generated by FTS into useful atomic data with a minimum
of human intervention.
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Title: Nighttime and daytime variation of atmospheric NO<SUB>2</SUB>
from ground-based infrared measurements
Authors: Flaud, J. -M.; Camy-Peyret, C.; Brault, J. W.; Rinsland,
C. P.; Cariolle, D.
1988GeoRL..15..261F Altcode:
During the period February 28 to March 2, 1986, 19 high resolution
atmospheric spectra have been recorded during the night using the
moon or during the day using the sun as a source with the Fourier
transform spectrometer at the McMath Solar telescope on Kitt Peak. The
NO<SUB>2</SUB> absorption peak located at 2914.65 cm<SUP>-1</SUP>
has been used to derive from the spectra the total vertical column
densities of atmospheric NO<SUB>2</SUB>. A rather rapid decrease of
the NO<SUB>2</SUB> amount during the night has been observed and its
daytime increase from sunrise to sunset has been confirmed. A comparison
with the predictions of a photochemical model is given.
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Title: Detector Quantum Efficiency: An Important Parameter for
FT-IR Spectroscopy
Authors: Birk, M.; Brault, J. W.
1988AcMik...2..243B Altcode:
No abstract at ADS
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Title: Fourier Transform Emission Spectroscopy of the b<SUP>3</SUP>
Π<SUB>g</SUB>- a<SUP>3</SUP>Σ<SUP>+</SUP><SUB>u</SUB> Transition
of He<SUB>2</SUB>
Authors: Rogers, S. A.; Brazier, C. R.; Bernath, P. F.; Brault, J. W.
1988MolPh..63..901R Altcode:
No abstract at ADS
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Title: Improved molecular parameters for the Ballik-Ramsay system
of diatomic carbon (b <SUP>3</SUP>Sigma <SUP> - </SUP><SUB>g</SUB>
--> a <SUP>3</SUP>Pi <SUB>u</SUB>)
Authors: Davis, Sumner P.; Abrams, Mark C.; Sandalphon; Brault,
James W.; Rao, M. L. P.
1988JOSAB...5.1838D Altcode: 1988OSAJB...5.1838D
The infrared spectrum of the C2(b3Sigma/-/g - a3Pi/u/) Ballik-Ramsay
system was observed in a hollow-cathode discharge source by using
a high-resolution Fourier-transform spectrometer. Ten bands with (v
prime-v double prime) equal to (0-1), (1-2), (2-3), (3-4), (0-0), (1-1),
(1-0), (2-1), (3-2), and (4-3) were observed in the spectral region
between 3300 and 6500/cm. The (3-4) and (4-3) bands were observed for
the first reported time. In addition, 360 lines belonging to satellite
branches were observed. A global fit of the present data combined with
previous high-resolution data in an iterative nonlinear least-square
algorithm yields equilibrium molecular parameters with a variance of
0.0051/cm. The inclusion of the satellite lines facilitates the direct
improvement of the fine-structure parameters. Rotational perturbations
were observed in the upper b3Sigma/-/g state and were analyzed by
using deperturbation methods.
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Title: Rotational Constants of the Lowest Torsional Component (0G)
of the Ground State and Lowest Torsional Component (1G) of the First
Excited Torsional State of Hydrogen Peroxide
Authors: Olson, W. B.; Hunt, R. H.; Young, B. W.; Maki, A. G.; Brault,
J. W.
1988JMoSp.127...11O Altcode:
No abstract at ADS
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Title: FTS-Raman flame spectroscopy of high-J lines in H<SUB>2</SUB>
and D<SUB>2</SUB>
Authors: Jennings, D. E.; Weber, A.; Brault, J. W.
1987JMoSp.126...19J Altcode:
High-J rotational transitions in the ground vibrational state
of molecular hydrogen and deuterium have been recorded using the
FTS-Raman technique. Transitions above those recorded previously at room
temperature were observed in diffusion flames burning H<SUB>2</SUB>
with air, and D<SUB>2</SUB> with air. For H<SUB>2</SUB> the v = 0-0
S(6) and S(7) transitions, which had not been observed previously,
were recorded in the flame spectra. For D<SUB>2</SUB> the flame
spectra yielded measurements of the S(7) through S(12) lines for
the first time. By combining flame and room-temperature Raman and
infrared measurements it has been possible to improve H<SUB>2</SUB>
ground state rotation constants to fifth order. For D<SUB>2</SUB>, the
combination of flame and room-temperature Raman measurements required an
extension to fifth-order constants, as compared with the third-order fit
which was adequate for the room-temperature data alone. Our improved
line positions can be applied to transitions observed in the Orion
Molecular Cloud.
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Title: On the Apparent Velocity of Integrated Sunlight. I. 1983--1985
Authors: Deming, Drake; Espenak, Fred; Jennings, Donald E.; Brault,
James W.; Wagner, Jeremy
1987ApJ...316..771D Altcode:
The authors have measured absolute frequencies for the ΔV = 2
transitions of <SUP>12</SUP>C<SUP>16</SUP>O in the 2.3 μm spectrum
of integrated sunlight. The data consist of 78 interferograms taken
over a 3 yr period with the McMath Fourier transform spectrometer on
Kitt Peak. The spectra cover the 4000 - 4800 cm<SUP>-1</SUP> region
with 0.012 cm<SUP>-1</SUP> resolution. At a given epoch, the absolute
velocity of integrated sunlight were obtained with an uncertainty
of ⪉5 m s<SUP>-1</SUP>. The authors find that the integrated light
velocity varies by ⪉3 m s<SUP>-1</SUP> over a 1 day period, consistent
with expectations based on the properties of supergranulation. Over
the long term, the data indicate an increasing blueshift in these weak
infrared lines, amounting to 30 m s<SUP>-1</SUP> from 1983 through
1985. The sense of the drift is consistent with a lessening in the
magnetic inhibition of granular convection at solar minimum.
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Title: The spectrum of Al I and Al II in the infrared (1800 <
σ < 9000 cm<SUP>-1</SUP>)
Authors: Biemont, E.; Brault, J. W.
1987PhyS...35..286B Altcode:
The spectrum of Al I and Al II produced by a hollow-cathode discharge
has been observed by Fourier-transform spectroscopy between 1800 and
9000/cm. These observations have allowed an extension of the term
systems of Al I and Al II. The results are also used for revising the
identification of Al I lines in the solar photospheric spectrum.
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Title: High Precision Fourier Transform Spectrometry: The Critical
Role of Phase Corrections
Authors: Brault, J. W.
1987AcMik...3..215B Altcode:
In high precision Fourier transform spectrometry, proper handling of
the phase correction is essential if the full potential wave number
accuracy of the data is to be preserved. One-sided interferograms are
shown to be especially sensitive to phase error, and this sensitivity
is quantitatively related to the signal-to-noise ratio. The role of
the truncation/apodization function used to obtain the phase correction
is also discussed, as is the special problem of emission spectra.
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Title: Infrared emission band spectrum of Si2
Authors: Davis, Sumner P.; Brault, James W.
1987JOSAB...4...20D Altcode: 1987OSAJB...4...20D
A strong infrared emission band spectrum of Si2 was observed in the
region between 4500 and 6500/cm. It consists of 21 red-degraded bands,
which are transitions between two newly observed low-lying singlet
states d1Sigma g (+)-b1Pi(mu). The bands arise from transitions between
vibrational levels from 0 to 6 in both electronic states. Rotational
lines up to J = 162 were observed. A global fit was made to 2000
spectral lines, and fits were made to individual branches of each
band. The source was a King-type furnace charged with SiC, filled with
helium at a pressure of 100 Torr, and maintained at a temperature of
2700 K. The spectrometer was the Fourier-transform instrument at the
National Solar Observatory (Kitt Peak).
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Title: Monodeuterated Methane in the Outer Solar System. II. Its
Detection on Uranus at 1.6 Microns
Authors: de Bergh, C.; Lutz, B. L.; Owen, T.; Brault, J.; Chauville, J.
1986ApJ...311..501D Altcode:
The authors have detected the 3ν<SUB>2</SUB> band of CH<SUB>3</SUB>D in
the spectrum of Uranus recorded with the Fourier Transform Spectrometer
at the 4 m Mayall telescope of KPNO. Using a scattering-model
atmosphere and spectral synthesis techniques, they derive a
bulk CH<SUB>3</SUB>D/CH<SUB>4</SUB> mixing ratio of 3.6(+3.6,
-2.8)×10<SUP>-4</SUP> from these observations. This suggests a
deuterium enhancement in methane relative to that observed on Jupiter
and Saturn.
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Title: The infrared spectrum of magnesium (1800 < σ <
9000cm<SUP>-1</SUP>) and an extension of the term systems of Mg I
and Mg II
Authors: Biemont, E.; Brault, J. W.
1986PhyS...34..751B Altcode:
The spectrum of neutral and singly ionized magnesium produced by a
hollow-cathode discharge has been observed by the Fourier transform
spectroscopy technique between 1800 and 9000/cm. The observations
reported here have allowed an extension of the term systems of Mg
I and Mg II; more particularly, first observational evidence is
reported for 3s ng (1,3)G (n = 8 or less) terms of Mg I and ni2I(n =
10 or less) terms of Mg II. The results are also used for refining the
identification of magnesium lines in the solar photospheric spectrum.
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Title: The nickel spectrum in the infrared - Application to the
solar spectrum
Authors: Biemont, E.; Delbouille, L.; Roland, G.; Brault, J. W.
1986A&AS...65...21B Altcode:
The spectrum emitted from a nickel hollow cathode has been recorded
in the infrared region (1800 < σ < 9000 cm<SUP>-1</SUP>) with
the National Solar Observatory Fourier transform spectrometer. The
spectra have been used in order to identify many lines on new high
resolution solar spectra.
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Title: Fourier Transform Spectrometer Observations of Solar Carbon
Monoxide. II. Simultaneous Cospatial Measurements of the Fundamental
and First-Overtone Bands, and CA II K, in Quiet and Active Regions
Authors: Ayres, T. R.; Testerman, L.; Brault, J. W.
1986ApJ...304..542A Altcode:
Fourier transform spectrometry has yielded simultaneous cospatial
measurements of important diagnostics of thermal structure in the high
solar photosphere and low chromosphere. It is noted that the anomalous
behavior of the fundamental bands of CO in quiet areas near the limb is
accentuated in an active region plage observed close to the limb. The
difference between the core temperatures of the CO fundamental bands
in a plage and a nearby quiet region at the limb is larger than the
corresponding brightness temperature differences in the inner wings
of the Ca II line measured in a quiet region and several plages
closer to the disk center. Numerical simulations indicate that the
disparate behavior of the CO bands with respect to Ca II K cannot be
reconciled with existing single component thermal structure models;
a two-component atmosphere is required.
---------------------------------------------------------
Title: The high-resolution spectrum of water vapor between 13 200
and 16 500 cm<SUP>-1</SUP>
Authors: Mandin, J. -Y.; Chevillard, J. -P.; Camy-Peyret, C.; Flaud,
J. -M.; Brault, J. W.
1986JMoSp.116..167M Altcode:
High-resolution Fourier transform spectra of water vapor between 13
200 and 16 500 cm<SUP>-1</SUP> have been analyzed, leading to a precise
and extensive set of line positions, line intensities, and rotational
energy levels of highly excited vibrational states.
---------------------------------------------------------
Title: The v = 1 <-- 0 quadrupole spectrum of N<SUB>2</SUB>
Authors: Reuter, D.; Jennings, D. E.; Brault, J. W.
1986JMoSp.115..294R Altcode:
Transitions in the O and S branches of the v = 1 <-- 0 band
of molecular <SUP>14</SUP>N<SUB>2</SUB> have been recorded in the
laboratory using the 1-m Fourier transform spectrometer located at Kitt
Peak. Analysis of the line position data has led to improved values for
the Dunham coefficients of N<SUB>2</SUB>. Furthermore, an analysis of
the linewidths and peak heights have yielded values of γ<SUB>L</SUB>
= (0.0345 +/- 0.0029) cm<SUP>-1</SUP>/atm for the self-broadening
coefficient of N<SUB>2</SUB> and (∂Q/∂r)r<SUB>e</SUB> = (0.933 +/-
0.039)ea<SUB>0</SUB> for the derivative of the molecular quadrupole
moment.
---------------------------------------------------------
Title: Raman spectroscopy of gases with a Fourier transform
spectrometer: the spectrum of D<SUB>2</SUB>
Authors: Jennings, D. E.; Weber, A.; Brault, J. W.
1986ApOpt..25..284J Altcode:
Fourier transform spectrometry (FTS) is presently used to record
the spontaneous incoherent laser Raman spectra of gases. The
high resolution, sensitivity, calibration accuracy and spectral
coverage achieved demonstrate the viability of FTS for Raman
spectroscopy. Attention is given to the coefficients obtained by
fitting measurements obtained from the spectrum of D2, containing
both v = 0-0 and 1-0 transitions, to the Dunham (1932) expansion of
the vibration-rotation energy levels.
---------------------------------------------------------
Title: Large SPOT umbra
Authors: Brault, J.
1986lsu..book.....B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: The convective noise floor for the spectroscopic detection
of low mass companions to solar type stars.
Authors: Deming, D.; Espenak, F.; Jennings, D. E.; Brault, J. W.
1986abd..proc...58D Altcode:
The threshold mass for the unambiguous spectroscopic detection of low
mass companions to solar type stars is defined here as the time when
the maximum acceleration in the stellar radial velocity due to the
Doppler reflex of the companion exceeds the apparent acceleration
produced by changes in convection. An apparent acceleration of
11 m/s/yr in integrated sunlight was measured using near infrared
Fourier transform spectroscopy. This drift in the apparent solar
velocity is attributed to a lessening in the magnetic inhibition of
granular convection as solar minimum approaches. The threshold mass
for spectroscopic detection of companions to a one solar mass star is
estimated at below one Jupiter mass.
---------------------------------------------------------
Title: Double passing the Kitt Peak 1-m Fourier transform spectrometer
Authors: Jennings, D. E.; Hubbard, R.; Brault, J. W.
1985ApOpt..24.3438J Altcode:
Attention is given to a simple technique for performing the conversion
of the Kitt Peak 1-m Fourier transform spectrometer's dual input/output
optical configuration to a double pass configuration that improves
spectral resolution by a factor of 2. The modification is made
by placing a flat mirror in the output beam from each cat's eye,
retroreflecting the beams back through the cat's eyes to the first
beam splitter. A single detector is placed at the second input port,
which then becomes the instrument's output.
---------------------------------------------------------
Title: The spectrum of magnesium hydride
Authors: Bernath, P. F.; Black, J. H.; Brault, J. W.
1985ApJ...298..375B Altcode:
Emission spectra of the A<SUP>2</SUP>Π-X<SUP>2</SUP>Σ<SUP>+</SUP>
system of MgH have been studied at high resolution and with high
signal-to-noise ratio through the use of a Fourier transform
spectrometer. On the basis of a rotational analysis of these data,
frequencies are predicted for the lowest pure rotational transitions
with an accuracy approaching ±30 MHz. Frequencies of the (1,0)
vibration-rotation lines are calculated to an accuracy of ±0.002
cm<SUP>-1</SUP>. The excitation and observability of MgH in interstellar
clouds are discussed.
---------------------------------------------------------
Title: Fourier transform emission spectroscopy: The vibration-rotation
spectrum of CuH
Authors: Ram, R. S.; Bernath, P. F.; Brault, J. W.
1985JMoSp.113..269R Altcode:
The Fourier transform infrared emission spectrum of CuH was
observed. The (1, 0), (2, 1), and (2, 0) vibration-rotation bands of
both <SUP>63</SUP>CuH and <SUP>65</SUP>CuH were recorded from a copper
hollow-cathode discharge in neon and hydrogen. Improved molecular
constants for the v = 0, 1, and 2 levels of CuH are provided. This
work is the first observation of a vibration-rotation spectrum of a
metal hydride in emission.
---------------------------------------------------------
Title: Fourier transform emission spectroscopy of NeH<SUP>+</SUP>
Authors: Ram, R. S.; Bernath, P. F.; Brault, J. W.
1985JMoSp.113..451R Altcode:
The Fourier transform emission spectrum of NeH<SUP>+</SUP> was
observed. The (1, 0), (2, 1), and (3, 2) vibration-rotation
bands of <SUP>20</SUP>NeH<SUP>+</SUP>; the (1, 0) and (2, 1)
bands of <SUP>20</SUP>NeD<SUP>+</SUP>; and the (1, 0) band of
<SUP>22</SUP>NeH<SUP>+</SUP> were recorded from a copper hollow-cathode
discharge in neon and hydrogen. Molecular constants, including
Born-Oppenheimer breakdown parameters, were extracted from the data.
---------------------------------------------------------
Title: The high-resolution spectrum of water vapor between 16500
and 25250 cm<SUP>-1</SUP>
Authors: Camy-Peyret, C.; Flaud, J. -M.; Mandin, J. -Y.; Chevillard,
J. -P.; Brault, J.; Ramsay, D. A.; Vervloet, M.; Chauville, J.
1985JMoSp.113..208C Altcode:
High-resolution spectra of water vapor have been recorded, with very
good signal-to-noise ratios, between 16500 and 25250 cm<SUP>-1</SUP>
using visible Fourier transform spectroscopy. Precise line positions
have been derived, and 1174 vibration-rotation transitions belonging
to 23 different bands of H<SUB>2</SUB>O have been assigned, leading
to the determination of 539 vibration-rotation energy levels and
greatly extending our knowledge of the highly excited vibrational
states of the water molecule. The measurement of 630 line intensities
with accuracies varying from 5 to 35%, depending on the strength of
the line, has been performed.
---------------------------------------------------------
Title: Identification on chromium lines in the infrared solar spectrum
based on new interferometric measurements
Authors: Biemont, E.; Delbouille, L.; Roland, G.; Brault, J. W.
1985A&AS...61..185B Altcode:
High resolution spectra of chromium obtained by the interferometric
method show the presence of several hundreds of new lines in the
infrared region (1800 < V < 9000 cm<SUP>-1</SUP>). These spectra
have been used in order to proceed to the identification of many
weak lines on the high resolution solar spectra obtained recently by
Delbouille et al. (1981).
---------------------------------------------------------
Title: Book-Review - Solar Flux Atlas from 296 TO 1300-NM
Authors: Kurucz, R. L.; Furenlid, I.; Brault, J.; Testerman, L.
1985S&T....70...38K Altcode:
No abstract at ADS
---------------------------------------------------------
Title: An investigation of iron in the infrared solar spectrum based
on FTS laboratory measurements
Authors: Biemont, E.; Roland, G.; Delbouille, L.; Brault, J. W.
1985A&AS...61..107B Altcode:
The application of new high-resolution laboratory data for iron,
covering the region 1800 to 9000/cm, to the identification of many
weak lines on high signal-to-noise-ratio solar photospheric spectra,
is discussed. The spectra emitted by iron hollow cathodes with three
different carrier gases (He-Ne-Ar) are recorded with the Fourier
transform spectrometer on Kitt Peak. Comparisons between the spectra
of iron and the spectra of nickel and of chromium recorded with the
same carrier gas and between the iron spectrum and the KPNO solar
spectrum drawn at the same scale are considered. The results are
presented in tables.
---------------------------------------------------------
Title: Vibration-rotation parameters for high-temperature silicon
monoxide from sunspot spectra
Authors: Glenar, David A.; Hill, Andrew R.; Jennings, Donald E.;
Brault, James W.
1985JMoSp.111..403G Altcode:
Absorption features from vibrational transitions of silicon
monoxide have been observed in sunspot umbrae between 1070 and 1225
cm<SUP>-1</SUP> using the Fourier transform spectrometer (FTS) at
the McMath Solar Telescope of the National Solar Observatory, located
at Kitt Peak. Sunspots are a source of high-temperature spectra not
easily obtained in the laboratory. Measurements were made of 937
<SUP>28</SUP>SiO, <SUP>29</SUP>SiO, and <SUP>30</SUP>SiO fundamental
and hot band transitions in the umbral spectrum extending to v =
10 and J = 80. All three isotopic species were treated together to
derive 10 Dunham rotation-vibration coefficients.
---------------------------------------------------------
Title: On the Potential for Spectroscopic Detection of Planetary
Companions to Solar-Type Stars.
Authors: Deming, D.; Espenak, F.; Jennings, D.; Brault, J. W.
1985BAAS...17..705D Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Monodeurated methane in the outer solar system. 2. Its
detection on Uranus at 1.6 microns
Authors: Debergh, C.; Lutz, B. L.; Owen, T.; Brault, J.; Chauville, J.
1985STIN...8527782D Altcode:
Deuterium in the atmosphere of Uranus has been studied only via
measurements of the exceedingly weak dipole lines of hydrogen-deuteride
(HD) seen in the visible region of the spectrum. The other sensitive
indicator of deuterium in the outer solar system is monodeuterated
methane (CH3D) but the two bands normally used ot study this molecule,
NU<SUB>2</SUB> near 2200 1/cm and NU<SUB>6</SUB> near 1161 1/cm,
have not been detected in Uranus.
---------------------------------------------------------
Title: The Solar Radial Velocity and Implications for Spectroscopic
Planetary Detection
Authors: Deming, D.; Espenak, F.; Jennings, D.; Brault, J. W.
1985BAAS...17..588D Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Fourier Transform Spectroscopy
Authors: Brault, J. W.
1985hra..conf....3B Altcode: 1985SAAS...15....3B
No abstract at ADS
---------------------------------------------------------
Title: Fourier transform spectrometry at the National Solar
Observatory: recent work on the OH radical.
Authors: Brault, J. W.
1985SPIE..553...97B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Oscillator strengths of the C2 A(1)Pi(mu)-X(1)Sigma(g+)
Phillips system
Authors: Davis, S. P.; Pecyner, R.; Smith, W. H.; Brault, J. W.;
Wagner, J.
1984ApJ...287..455D Altcode:
A high temperature absorption cell and Fourier transform
spectrometer were used to measure the f-values of the A-X Phillips
bands of the C2 molecules in comparisons with the Swan transition
f-values. Interferometric fringes were also obtained of the solar
C2 lines as references. The measurements were taken to determine the
true oscillator strengths for abundance observations of stellar and
interstellar sources. The Swan (0-0)/Phillips (1-0) ratio was near
1.48 and the Swan (0-0)/Phillips (0-0) ratio about 18.2, which implies
a Phillips (1-0) value of approximately 0.0017 and a Phillips (0-0)
value of 0.00138. The results indicate that downward revisions are
necessary for previous estimates of the Phillips values.
---------------------------------------------------------
Title: The infrared spectrum of CS
Authors: Winkel, R. J., Jr.; Davis, S. P.; Pecyner, R.; Brault, J. W.
1984CaJPh..62.1414W Altcode:
The (Delta-v)=2 IR emission bands of the X1Sigma(+) state of gaseous
(C-12)(S-32) and (C-12)(S-34) are investigated experimentally
using the Fourier-transform spectrometer at Kitt Peak National Solar
Observatory. The results are presented in tables and characterized. Of
the eight bands (containing up to 200 lines each) identified for
(C-12)(S-32), the strongest head is that of 2-0 at 2585/cm, with the
other heads toward smaller wavenumbers separated by about 26/cm. The
interest of these transitions for astrophysical studies of the emissions
of C-rich stars, molecular clouds, and comets is indicated.
---------------------------------------------------------
Title: Diurnal variations of atmospheric nitric oxide - Ground-based
infrared spectroscopic measurements and their interpretation with
time-dependent photochemical model calculations
Authors: Rinsland, C. P.; Boughner, R. E.; Larsen, J. C.; Stokes,
G. M.; Brault, J. W.
1984JGR....89.9613R Altcode:
Total vertical column amounts of NO have been derived from infrared
solar absorption spectra recorded near sunrise and sunset with
the 0.01 per cm resolution Fourier transform interferometer at the
national Solar Observatory on Kitt peak (elevation 2095 m, latitude
31.9 degrees N) on February 23, 1981. The results show an increase
in NO concentration in the morning, late afternoon values about 40
percent higher than in the morning, and a decrease in NO concentration
prior to sunset. The measured diurnal changes in the total vertical
column amount are compared with values obtained from time-dependent
photochemical calculations.
---------------------------------------------------------
Title: Characteristics of Water Vapor Over Kitt-Peak as Determined
from FTS Data
Authors: Wallace, L.; Brault, J. W.; Brown, M.; Livingston, W.
1984PASP...96..836W Altcode:
Spectra of three water vapor lines obtained with the Fourier transform
spectrometer at the McMath telescope have been analyzed to obtain the
atmospheric water-vapor content. The results for 52 days between 1978
and 1983 show a maximum of between 20 and 25 mm precipitable water vapor
in July and August and minima between February and June and between
October and December. Outside of a secondary maximum due to two days
in January 1983 the results are in generally good agreement with those
obtained with a grating spectrograph. The pressure-broadened linewidths
have been used to make corrections not exceeding 11% to the results
obtained with the spectrograph.
---------------------------------------------------------
Title: The pure rotation spectrum of OH and the solar oxygen abundance
Authors: Sauval, A. J.; Grevesse, N.; Zander, R.; Brault, J. W.;
Stokes, G. M.
1984ApJ...282..330S Altcode:
High-resolution low-noise spectroscopic observations of the sun obtained
in the 10.6-13-micron range using the Fourier-transform spectrometer at
Kitt Peak National Observatory are reported. About 100 pure rotation
lines of the X 2Pi electronic state of OH with v = 0, 1, 2, and 3
are identified and characterized. The data are presented in tables
and graphs and used to calculate the solar O abundance as 8.91 + or -
0.01 (in agreement with Lambert, 1978). Agreement is also found with
the electric-dipole-moment function of Werner et al. (1983) and the
photospheric model of Holweger and Mueller (1974).
---------------------------------------------------------
Title: The v=0 0 spectrum of H2.
Authors: Jennings, D. E.; Bragg, S. L.; Brault, J. W.
1984ApJ...282L..85J Altcode:
Ground-state rotational parameters for molecular hydrogen are evaluated
using a combination of laboratory and observational data. High-accuracy
v = 0 - 0 S(0)-S(5) frequencies from infrared laboratory measurements
are analyzed simultaneously with available observed frequencies
for the S(8), S(9), S(12), S(13), S(14), and S(15) Orion emission
lines. The laboratory and Orion measurements are consistent with each
other within their measurement errors. The combined data set yields a
determination of five v = 0 rotational parameters and an improvement
in the high-J calculated line positions. The analysis produces the
parameters (in per cm): B(0) = 59.334627(30), D(0) = 0.0456912(30),
H(0) = 4.8974(90) x 10 to the -5th, L(0) = -6.320(110) x 10 to the
-8th, M(0) = 7.19(30) x 10 to the -11th, where a correction is made
for the estimated contribution of sixth and higher orders.
---------------------------------------------------------
Title: Rotational Assignments in the 6200A Band of Methane
Authors: de Bergh, C.; Brault, J.; Scherer, G. J.; Lehmann, K. K.;
Klemperer, W.; Pine, A. S.
1984BAAS...16..669D Altcode:
No abstract at ADS
---------------------------------------------------------
Title: The 12 micron band of ethane - High-resolution laboratory
analysis with candidate lines for infrared heterodyne searches
Authors: Daunt, S. J.; Atakan, A. K.; Blass, W. E.; Halsey, G. W.;
Jennings, D. E.; Reuter, D. C.; Susskind, J.; Brault, J. W.
1984ApJ...280..921D Altcode:
Emission from the ν<SUB>9</SUB> band of ethane at 12 μm has been
reported in the spectra of Jupiter, Saturn, Neptune, and Titan. This
paper reports the results of a laboratory study of ν<SUB>9</SUB>
using both high-resolution Fourier transform and diode laser
absorption spectroscopy. Approximately 2000 transitions in this
band have been subjected to an analysis that includes the normal
rovibrational terms as well as higher order effects. A model for this
band capable of reproducing observed ν<SUB>9</SUB> features to better
than 0.001 cm<SUP>-1</SUP> is presented. High-precision values of the
primary ground-state constants have also been determined. A list of
ν<SUB>9</SUB> transitions occurring near <SUP>14</SUP>CO<SUB>2</SUB>
laser lines that are good candidates for laser heterodyne searches
has been compiled.
---------------------------------------------------------
Title: Diagnostics of solar magnetic fluxtubes using a Fourier
transform spectrometer
Authors: Stenflo, J. O.; Solanki, S.; Harvey, J. W.; Brault, J. W.
1984A&A...131..333S Altcode:
An overview is presented of the diagnostic contents for fluxtube
modelling of Fourier transform spectrometer recordings of the
longitudinal Zeeman effect near the solar disk center made in
April 1979. The observations and data reductions are summarized
and the application of the weak-field model to the Stokes profiles
is examined. The significance of telluric lines and blends and the
validity of LS coupling are considered. The magnetic fluxes, intrinsic
field strengths, and area factors are discussed and the thermodynamic
properties of fluxtubes are addressed. Mass motions inside the fluxtubes
and the height variation of fluxtube parameters are considered.
---------------------------------------------------------
Title: Solar flux atlas from 296 to 1300 nm
Authors: Kurucz, Robert L.; Furenlid, Ingemar; Brault, James;
Testerman, Larry
1984sfat.book.....K Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Uranium Spectrum between 1.8 and 5.5 Microns Emitted from a
Hollow Cathode
Authors: Conway, J. G.; Worden, E. F.; Brault, J. W.; Hubbard, R. P.;
Wagner, J. J.
1984ADNDT..31..299C Altcode:
The emission spectrum of uranium has been observed in the infrared from
1.8 to 5.5 μm using the McMath Fourier transform spectrometer at the
Kitt Peak National Observatory, and a water-cooled hollow cathode
lamp. The wavenumber, wavelength, and relative intensity of 4418
lines between 1817 and 5598 cm <SUP>-1</SUP> that can be classified
as transitions between known levels of the first and second spectra of
uranium have been tabulated. In addition, wavenumbers and intensities
of 4744 lines that cannot be classified in this manner are listed. Most
of these are believed to be uranium emission lines. Isotope shifts
are reported for 196 lines.
---------------------------------------------------------
Title: Astronomical Fourier Transform Spectroscopy Revisited
Authors: Ridgway, S. T.; Brault, J. W.
1984ARA&A..22..291R Altcode:
The principal objective of this review is to introduce the Fourier
transform spectrometer (FTS) and to discuss both its demonstrated
capabilities and its limitations for astronomical measurements. A very
brief introduction to the optical characteristics of the FTS is followed
by a point-by-point consideration of the distinctive features of the
FTS that make it attractive or unattractive for particular astronomical
applications. To further clarify the possible uses of the technique,
the final section of the review describes in some detail numerous
successful applications of the FTS.
---------------------------------------------------------
Title: Report of the optical conference on the 7.6-meter telescope
held in Austin, Texas, March 22 - 24, 1982.
Authors: Smith, H. J.; Barnes, T. G., III; Tull, R. G.; Nather, R. E.;
Angel, R.; Meinel, A.; Macfarlane, M.; Brault, J.; Neugebauer, G.;
Gillett, F.; Richardson, E. H.
1984PAUTx..22.....S Altcode:
Contents: Introductions (H. J. Smith). History of the
project (H. J. Smith). Project constraints (T. G. Barnes
III).Project constraints (R. G. Tull). Telescope concept
(R. E. Nather). Auxiliary instruments (R. E. Nather). Paul-Baker prime
focus (R. Angel). Prime focus and Nasmyth cameras (A. Meinel). Nasmyth
focal reducers (M. MacFarlane). Spectrometry (R. Angel, R. G. Tull,
J. Brault). Infrared sites (G. Neugebauer). IR instrumentation
(F. Gillett). Prime focus imaging (E. H. Richardson). Primary mirror
figure control (R. G. Tull).
---------------------------------------------------------
Title: Coherent scattering in the solar spectrum - Survey of linear
polarization in the range 4200-9950 A
Authors: Stenflo, J. O.; Twerenbold, D.; Harvey, J. W.; Brault, J. W.
1983A&AS...54..505S Altcode:
Solar-limb linear polarization observations are reported and
discussed. A linearly polarized 4200-9950-A spectrum was obtained using
the Fourier-transform spectrometer on the KPNO McMath telescope with
an entrance aperture of 10 x 17.5 arcsec centered 10 arcsec inside
the solar limb near one of the heliograhic poles, in seven 48-95-min
exposures on October 2-3, 1978, and April 27-28, 1979, and recorded
using the special modulation scheme described by Brault (1978). The
noise level varies from 0.01 to 0.1 percent, and the continuum
polarization decreases from over 0.1 percent below 4200 A to less than
0.01 percent above 6000 A. The polarization amplitudes of the clearly
significant lines are listed in a table, and the polarization profiles
of the most interesting cases are illustrated and discussed. It is
shown that the conventional model of dipole and isotropic scattering
is contradicted by the observations of fluorescent scattering within
and between multiplets and of quantum-mechanical interferences between
atomic states with different combinations of total angular momenta.
---------------------------------------------------------
Title: The ground state of molecular hydrogen
Authors: Jennings, D. E.; Brault, J. W.
1983JMoSp.102..265J Altcode:
The v = 0-0 quadrupole spectrum of H<SUB>2</SUB> has been recorded using
a 0.005-cm<SUP>-1</SUP> resolution Fourier transform spectrometer. The
rotational lines S(1) through S(5) are observable in the spectra,
in the region 587 to 1447 cm<SUP>-1</SUP>. The spectral position
for S(0) was also obtained from its v = 1-0 ground-state combination
difference. The high accuracy of the H<SUB>2</SUB> measurements has
permitted a determination of four rotational constants. These are
(in cm<SUP>-1</SUP>) B<SUB>0</SUB> = 59.33455(6); D<SUB>0</SUB>
= 0.045682(4); H<SUB>0</SUB> = 4.854(12) × 10<SUP>-5</SUP>
L<SUB>0</SUB> = -5.41(12) × 10<SUP>-8</SUP>. The hydrogen line
positions will facilitate studies of structure and dynamics in
astrophysical objects exhibiting infrared H<SUB>2</SUB> spectra. The
absolute accuracy of frequency calibration over wide spectral ranges
was verified using 10-μm CO<SUB>2</SUB> and 3.39-μm CH<SUB>4</SUB>
laser frequencies. Standard frequencies for 5-μm CO were found to be
high by 12 MHz (3.9 × 10<SUP>-4</SUP> cm<SUP>-1</SUP>).
---------------------------------------------------------
Title: Simultaneous detection of FC-11, FC-12 and FC-22, through 8
to 13 Micrometers IR solar observations from the ground
Authors: Zander, Rodolphe; Stokes, Gerald M.; Brault, James W.
1983GeoRL..10..521Z Altcode:
High-resolution solar observations covering the 8 to 13 µm atmospheric
window are now being carried out routinely at the Kitt Peak National
Observatory (KPNO), Tucson, Arizona, using a 1 meter-path difference
Fourier transform spectrometer. Such observations allow the simultaneous
measurement of a large number of trace gases. Preliminary results for
the three most important fluorocarbons, FC-11, FC-12 and FC-22 are
reported here. These results, in the form of average mixing ratios,
show the potential and illustrate the performance of the Kitt Peak
interferometer for this application.
---------------------------------------------------------
Title: Laboratory Spectra of CH<SUB>4</SUB> at Low Temperature for
an Improved Determination of the 12C/13C ratio in Jupiter and Saturn
Authors: de Bergh, C.; Johns, J. W. C.; McKellar, A. R. W.; Brault,
J.; Maillard, J. P.
1983BAAS...15..833D Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Solar emission lines near 12 microns
Authors: Brault, J.; Noyes, R.
1983ApJ...269L..61B Altcode:
The newly discovered 12 micron emission lines in the solar spectrum
are found to vary strongly with position on the solar disk. The two
strongest lines strengthen greatly toward the limb and disappear in spot
umbrae. They show pronounced splitting in spot penumbrae and plages,
characteristic of simple Zeeman triplets with g approximately equal
to 1. Their narrow line profiles suggest a chromospheric rather than
coronal origin, but the lines remain unidentified. Forty-one additional
unidentified far-infrared solar emission lines are reported. Potential
uses of the lines for astrophysical investigations are noted.
---------------------------------------------------------
Title: Magnetically-Sensitive Solar Emission Lines Near 12 Microns
Authors: Brault, J. W.; Noyes, R. W.
1983BAAS...15..702B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Line positions and strengths in the (001), (110), and (030)
bands of HDO
Authors: Toth, R. A.; Brault, J. W.
1983ApOpt..22..908T Altcode:
A Fourier transform spectrometer of 0.01/cm resolution has been used to
study the vibration-rotation spectrum of HDO in the 3250-4370/cm region,
and a nonlinear least squares fitting technique has been employed
in measurements of the strengths, positions and pressure-broadening
parameters of over 1400 lines. In addition to determining values of
both the ground state levels and levels in the (001), (110), and (030)
states, an analysis is undertaken of the strengths of 953 lines in
order to establish band strengths, F factor coefficients, and Fermi
interaction parameters. Detailed results are presented in tabular form.
---------------------------------------------------------
Title: Absorption Lines of Feh in a Sunspot Spectrum
Authors: Wohl, H.; Engvold, O.; Brault, J. W.
1983itab.rept....1W Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Structure and line strengths in extreme jk coupling: An
experimental and theoretical study in Ni II
Authors: Brault, J. W.; Litzén, U.
1983PhyS...28..475B Altcode:
The spectrum emitted from a nickel hollow cathode has been recorded
with a Fourier transform spectrometer. Two dense groups of lines just
above 18 000 Å have been identified as the transitions 3d<SUP>8</SUP>
(<SUP>3</SUP>F)5f-3d<SUP>8</SUP> (<SUP>3</SUP>F)6g and 3d<SUP>8</SUP>
(<SUP>3</SUP>F)5g-3d<SUP>8</SUP> (<SUP>3</SUP>F)6h in Ni II. The level
structure of the configurations involved in these transitions has been
studied by fitting the Slater parameters of the energy matrices to
the observations. The fitted parameters have been used for calculating
the relative line strengths in the transition arrays. Comparisons with
the observed intensities show very good agreement.
---------------------------------------------------------
Title: Absorption lines of FeH in a sunspot spectrum.
Authors: Wöhl, H.; Engvold, O.; Brault, J. W.
1983ITABO..56.....W Altcode:
The strengths of the 8690 Å and 9890 Å bands of the FeH molecule
are measured in the spectrum of a large sunspot. The strongest lines
attain central depths of about 20% of the continuum intensity.
---------------------------------------------------------
Title: Line positions and strengths in the H2 quadrupole spectrum.
Authors: Bragg, S. L.; Brault, J. W.; Smith, W. H.
1982ApJ...263..999B Altcode:
Experimental results from measurements of the number of levels in the
1-0 to 4-0 vibrational bands of molecular hydrogen are reported. The
observations were made with the Kitt Peak solar Fourier transform
spectrometer in conjunction with a 6 m base length White cell. Filters
with 3-6 A bandwidths were employed for the 3-0 and 4-0 lines,
while blocking filters were used for the 1-0 and 2-0 lines. A Galatry
(1961) function was fitted to the lines to ascertain their strengths
and centers. Results are provided for the frequencies of observed
transitions at 2.8 atm and 296 K, for the 1-0 and 2-0 pressure shifts,
and for rotational constants. New ground-state rotational constants
were defined, including B at 59.33451/cm, D at 0.04561/cm, and H
at 0.0000456/cm, which are noted to produce significant changes in
previously calculated high J lines.
---------------------------------------------------------
Title: Ground-based Infrared Spectroscopic Measurements of Atmospheric
Hydrogen Cyanide
Authors: Rinsland, C. P.; Smith, M. A. H.; Rinsland, P. L.; Goldman,
A.; Brault, J. W.; Stokes, G. M.
1982JGR....8711119R Altcode:
A number of lines of the ν<SUB>3</SUB> band of hydrogen cyanide have
been detected in solar absorption spectra recorded near sunrise and
sunset at Kitt Peak National Observatory (elevation 2095 m) with a 0.01
cm<SUP>-1</SUP> resolution Fourier transform spectrometer. Analysis
of two of the strongest and best isolated lines has led to a value
of 2.73×10<SUP>15</SUP> molecules cm<SUP>-2</SUP> for the vertical
column abundance of HCN above Kitt Peak. The accuracy of this value
is estimated as ±25%. This result, combined with the stratospheric
concentration of HCN derived by Coffey, Mankin, and Cicerone (1981),
yields 166 parts per trillion by volume for the average mixing ratio
of HCN between 2 and 12 km. This is the first determination of the
HCN concentration in the nonurban troposphere.
---------------------------------------------------------
Title: Fourier Transform Spectrometry in Relation to Other Passive
Spectrometers
Authors: Brault, J. W.
1982RSPTA.307..503B Altcode: 1982RSLPT.307..503B
The relative merits of Fourier transform spectrometers and alternative
passive spectrometers are explored qualitatively with emphasis on the
quantity, quality, and cost of information flow. This includes a brief
look at throughput, detector considerations and spectral coverage;
resolution and accuracy in intensity and wavelength; and cost of
construction and data reduction. Finally, the possibilities of multiple
detectors and extensions of the technique to the vacuum ultraviolet
by means of all-reflecting wavefront division interferometers are
mentioned.
---------------------------------------------------------
Title: Line positions and strengths of HDO in the 2400-3300-cm<SUP>
- 1</SUP> region
Authors: Toth, R. A.; Gupta, V. D.; Brault, J. W.
1982ApOpt..21.3337T Altcode:
The vibration-rotation spectrum of HDO in the 2400-3300 per cm region
has been studied at 0.01 per cm resolution with a Fourier transform
spectrometer. Values of the ground state levels and levels in the (100)
and (020) states have been determined from the data. The ground state
levels are fitted to a Watson-type Hamiltonian from which 17 rotational
constants are obtained. Measurements of the strengths of over 1100
lines have been made using a nonlinear least-squares fitting technique,
and 548 of these lines are analyzed to determine the band strengths,
the coefficients of the F factors, and the Coriolis interaction
parameters. The strengths of the A- and B-type (100) bands and the A-
and B-type (020) bands are 53.2 + or - 0.9, 0.43 + or - 0.07, 6.00 + or
- 0.54, and 2.75 + or - 0.12 per sq cm per atm at 296 K, respectively.
---------------------------------------------------------
Title: High Resolution Spectroscopy in the 6825Å Region.
Authors: de Bergh, C.; Chauville, J.; Brault, J.; Lutz, B. L.; Owen,
T.; Danehy, R.; Maillard, J. P.
1982BAAS...14..733D Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Analysis of the ν<SUB>1</SUB> and ν<SUB>2</SUB> +
ν<SUB>4</SUB> bands of <SUP>12</SUP>CH<SUB>4</SUB>
Authors: Brown, Linda R.; Toth, Robert A.; Robiette, Alan G.; Lolck,
Jens-Erik; Hunt, Robert H.; Brault, James W.
1982JMoSp..93..317B Altcode:
Line assignments, positions, strengths, and experimentally determined
upper states are reported for the ν<SUB>1</SUB> and ν<SUB>2</SUB>
+ ν<SUB>4</SUB> infrared bands of <SUP>12</SUP>CH<SUB>4</SUB>. The
bands have been analyzed using infrared spectra recorded with different
optical densities and temperatures at 0.02- and 0.01-cm<SUP>-1</SUP>
resolution using a four-passed grating spectrometer at Florida
State University and a Fourier transform spectrometer at Kitt Peak
National Observatory. Both ν<SUB>1</SUB> and ν<SUB>2</SUB> +
ν<SUB>4</SUB> lines are assigned through J' = 14. For J' >= 10,
the upper state of the vibrationally infrared inactive ν<SUB>1</SUB>
band interacts strongly with ν<SUB>2</SUB> + ν<SUB>4</SUB> and is
observed in the infrared spectrum with line strengths on the order
of 10<SUP>-3</SUP> cm<SUP>-2</SUP> atm<SUP>-1</SUP>. The upper-state
energies and transition intensities are calculated from the molecular
constants and transition moment matrix elements obtained through a
simultaneous analysis of ν<SUB>1</SUB>, ν<SUB>3</SUB>, ν<SUB>2</SUB>
+ ν<SUB>4</SUB>, 2ν<SUB>4</SUB>, and 2ν<SUB>2</SUB>.
---------------------------------------------------------
Title: Laboratory measurements of the pure rotation S/2/ and S/3/
transitions in H2
Authors: Jennings, D. E.; Brault, J. W.
1982ApJ...256L..29J Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Infrared bands of C2 in the solar photospheric spectrum
Authors: Brault, J. W.; Testerman, L.; Grevesse, N.; Sauval, A. J.;
Delbouille, L.; Roland, G.
1982A&A...108..201B Altcode:
Lines of the C<SUB>2</SUB> Phillips system have been successfully
searched for on new tracings of high resolution solar spectra. From a
rather large number of lines of the (0,0), (1,0), and (0, 1) bands,
we derive empirical values for the band oscillator strengths:
f<SUB>00</SUB> = 1.41 10<SUP>-3</SUP>, f<SUB>10</SUB> = 1.38
10<SUP>-3</SUP>, and f<SUB>01</SUB> = 1.12 10<SUP>-3</SUP>. These
solar f-values are discussed in section 3.1 and compared with recent
laboratory data. <P />For the Ballik-Ramsay system, only a few
unblended solar lines have been available, from which we deduced 0.6
10<SUP>-3</SUP> ≪ f<SUB>00</SUB> ≪ 1.2 10<SUP>-3</SUP>.
---------------------------------------------------------
Title: Fundamental vibration-rotation bands and molecular constants
for the ArH<SUP>+</SUP> ground state (<SUP>1</SUP>Σ<SUP>+</SUP>)
Authors: Brault, J. W.; Davis, S. P.
1982PhyS...25..268B Altcode:
Five vibration-rotation bands of the ground state
X<SUP>1</SUP>Σ<SUP>+</SUP> of ArH<SUP>+</SUP> have been observed
in the infrared emission spectrum of a carbon hollow cathode lamp,
using the McMath solar Fourier transform spectrometer at KPNO. The
leading Dunham coefficients are found to be (in cm<SUP>-1</SUP>):
Y<SUB>10</SUB> = 2710.9191, Y<SUB>20</SUB> = -61.630 75, Y<SUB>30</SUB>
= 0.502 654, Y<SUB>40</SUB> = -0.001 091 7; Y<SUB>01</SUB> = 10.461
276, Y<SUB>11</SUB> = -0.378 782, Y<SUB>21</SUB> = 0.003 017 3;
Y<SUB>02</SUB> = -6.230 × 10<SUP>-4</SUP>, Y<SUB>12</SUB> = 0.082
97 × 10<SUP>-4</SUP>; Y<SUB>03</SUB> = 1.584 × 10<SUP>-8</SUP>,
Y<SUB>13</SUB> = -0.0459 × 10<SUP>-8</SUP>; Y<SUB>04</SUB> ~ -0.64
× 10<SUP>-12</SUP>.
---------------------------------------------------------
Title: Detection par Voie Spectroscopique, de l'Acetylene et
de l'Ethane dans l'Atmosphere Terrestre, a partir d'Observations
Solaires Infrarouges au Sol
Authors: Zander, R.; Stokes, G. M.; Brault, J. W.
1982CRASB.295..583Z Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Isotopes of nickel in the sun
Authors: Brault, J. W.; Holweger, H.
1981ApJ...249L..43B Altcode:
High-resolution Fourier transform spectrometer spectra of near-infrared
Ni I lines reveal isotopic structure both in a laboratory source and
in the spectrum of the quiet photosphere. The solar Ni-58/Ni-60 ratio
agrees with that found in terrestrial and meteoritic matter
---------------------------------------------------------
Title: Line assignments and intensities of the nu 2 + nu 3 - nu 2
band of /C-12/H4
Authors: Brown, L. R.; Toth, R. A.; Hunt, R. H.; Brault, J. W.
1981JMoSp..89..528B Altcode: 1981MolPh..89..528B
As part of a comprehensive effort to compile line parameters of
methane from 2400 to 3200 cm <SUP>-1</SUP>, the P and R branches of the
ν<SUB>2</SUB> + ν<SUB>3</SUB> - ν<SUB>2</SUB> band of CH <SUB>4</SUB>
at 3010 cm <SUP>-1</SUP> were assigned through upper state J = 9. The
process utilized the analysis of ν<SUB>2</SUB> + ν<SUB>3</SUB>
at 4544 cm <SUP>-1</SUP> by J. C. Hilico, J. Degni, J. P. Champion,
and G. Guelachvili ( J. Mol. Spectrosc.81, 277-302 (1980)) and the
ν<SUB>2</SUB> levels derived from the infrared spectrum by Margolis (in
preparation) to predict the positions of the hot band. Experimentally
determined lower-state energies were used to confirm assignments, and
line intensities of the 300 transitions assigned are observed on the
order of 10 <SUP>-3</SUP> cm <SUP>-2</SUP> atm <SUP>-1</SUP> or less.
---------------------------------------------------------
Title: On the possible detection of CH3D on Titan and Uranus
Authors: Lutz, B. L.; de Bergh, C.; Maillard, J. -P.; Owen, T.;
Brault, J.
1981ApJ...248L.141L Altcode:
The possible spectral detection of monodeuterated methane, CH3D, in the
atmospheres of Titan and Uranus is reported. The detection was made
on the basis of the identification of a new band centered near 6425
per cm in laboratory spectra of CH3D, which could possibly account
for the strength of the methane absorption near 6400 per cm observed
in the interferometric spectra of Titan and Uranus of Fink and Larson
(1979). On the basis of measurements of the CH3D/CH4 natural abundance
ratio and the estimated band strength of the 6425 per cm band, it is
concluded that approximately 15% of the observed methane absorption
is due to CH3D, rather than a pure temperature effect in CH4.
---------------------------------------------------------
Title: Anomalous C-12H4:C-13H4 strengths in 3 NY sub 3
Authors: Brault, J. W.; Fox, K.; Jennings, D. E.; Margolis, J. S.
1981ApJ...247L.101B Altcode:
The C-12:C-13 ratios in the atmospheres of the outer planets are
important parameters with which to test models for isotope formation and
fractionation during the early history of the solar system, yielding
insight into processes occurring in the primitive solar nebula. The
3 ny<SUB>3</SUB> spectra of methane were obtained using the Kitt
Peak Solar Fourier Transform Spectrometer and a 6 m White cell. The
experimental results are summarized in a table. The strength ratios for
the R-branch of 3 ny<SUB>3</SUB> exhibit strong anomalies, with C-13H4
lines consistently weaker than their C-12H4 counterparts. The C-12:C-13
abundance ratios for the atmospheres of Jupiter and Saturn have been
redetermined using the 3 ny<SUB>3</SUB> line-strength ratios measured.
---------------------------------------------------------
Title: Detection of CH<SUB>3</SUB>D and Measurements of the
CH<SUB>3</SUB>D/CH<SUB>4</SUB> Ratio on Titan and Uranus.
Authors: de Bergh, C.; Lutz, B. L.; Lockwood, G. W.; Owen, T.; Brault,
J.; Buriez, J. C.
1981BAAS...13..703D Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Thermal Bifurcation in Solar Calcium Plages
Authors: Ayres, T. R.; Linsky, J. L.; Testerman, L.; Brault, J.
1981BAAS...13..915A Altcode:
No abstract at ADS
---------------------------------------------------------
Title: New Standard Wavelengths for the Radial Velocity Aficionado
Authors: Brault, J.; Hubbard, R.
1981KPNON..16....7B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Quadrupole transitions of the 1<-0 band of N<SUB>2</SUB>
observed in a high resolution atmospheric spectrum.
Authors: Camy-Peyret, C.; Flaud, J. -M.; Delbouille, L.; Roland, G.;
Brault, J. W.; Testerman, L.
1981JPhys..42L.279C Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Identification of the CrH molecule in a sunspot spectrum.
Authors: Engvold, O.; Woehl, H.; Brault, J. W.
1980A&AS...42..209E Altcode:
The <SUP>6</SUP>Σ<SUP>+</SUP> - <SUP>6</SUP>Σ<SUP>+</SUP> infrared
system of the CrH molecule has been identified in the spectrum of a
large sunspot.
---------------------------------------------------------
Title: CH<SUB>3</SUB>D: On its Possible Presence in Outer Planet
Atmospheres
Authors: Lutz, B. L.; Debergh, C.; Maillard, J. P.; Owen, T.;
Brault, J.
1980BAAS...12..837L Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Regions of Weak Methane Absorptions in the Near Infrared :
Laboratory Measurements and Planetary Applications.
Authors: de Bergh, C.; Maillard, J. P.; Brault, J.; Buriez, J. C.;
Lutz, B.; Owen, T.
1980BAAS...12..668D Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Detection of electric quadrupole transitions in the oxygen
A band at 7600 Å
Authors: Brault, James W.
1980JMoSp..80..384B Altcode:
Observations of the sun at low altitude have been used to detect
the <SUP>T</SUP>S (electric quadrupole) branch of the “A” band
of atmospheric oxygen at 7600 Å. Line strengths, line-widths, and
wavenumbers are tabulated for the eight observable lines, N” = 5 to
19. These quadrupole transitions are found to be weaker than the main
magnetic dipole transitions by a factor of 3 × 10<SUP>-6</SUP>. <P
/>Operated by the Association of Universities for Research in Astronomy,
Inc., under contract with the National Science Foundation.
---------------------------------------------------------
Title: A Polarimeter for a Fourier Transform Spectrometer and Initial
Solar Observations
Authors: Harvey, J.; Brault, J.; Stenflo, J.; Zwaan, C.
1980BAAS...12R.476H Altcode:
No abstract at ADS
---------------------------------------------------------
Title: The titanium oxide phi system
Authors: Galehouse, D. C.; Davis, S. P.; Brault, J. W.
1980ApJS...42..241G Altcode:
The phi system of titanium oxide has been studied in emission in the
near-infrared, with the Fourier transform spectrometer, at a resolution
of 800,000. Approximately 3000 lines from 25 bands of this system have
been identified, including all five 0-0 and 0-1 bands corresponding
to the five natural titanium isotopes. Eleven vibrational levels have
been observed, and all bands have been rotationally analyzed. Band
intensities are in agreement with known isotopic abundances and
calculated Franck-Condon factors.
---------------------------------------------------------
Title: Determination of the H2 4-0 S/1/ quadrupole line strength
and pressure shift
Authors: Brault, J. W.; Smith, W. H.
1980ApJ...235L.177B Altcode:
The strength of the 4-0 S(1) transition of H2 is 1.54 plus or minus
0.09 x 0.0001/cm (km amagat). This is in good agreement with theoretical
predictions, but at variance with published laboratory measurements. A
pressure shift for the same transition was measured to be -0.0065
plus or minus 0.0014/cm amagat between 2.58 and 1.65 amagats, which
is close to the predicted value of semiempirical theory.
---------------------------------------------------------
Title: Solar Fourier Transform Spectroscopy
Authors: Brault, J. W.
1980fsoo.conf...33B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Solar Fourier transform spectroscopy.
Authors: Brault, J. W.
1979MmArc.106...33B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Intensity and pressure shift of the H<SUB>2</SUB>(4,0) S(1)
quadrupole line.
Authors: Bergstralh, J. T.; Margolis, J. S.; Brault, J. W.
1978ApJ...224L..39B Altcode:
Results are presented for two laboratory measurements of the intensity
and central frequency of the (4, 0) S(1) quadrupole line of H2, which
were made at pressures of 2.658 and 1.494 atm through a 0.456-km path
length. It is found that the absolute line intensity is significantly
lower than the value predicted from theoretical matrix elements but is
essentially identical to the value derived by Rank et al. (1966). The
central-frequency results are shown to verify the pressure shift
predicted by McKellar (1974). It is concluded that hydrogen abundances
estimated from the equivalent width of the (4,0) S(1) quadrupole line
in the spectra of the outer planets will have to be revised upward by
nearly a factor of 2.
---------------------------------------------------------
Title: High Resolution Laboratory Spectrum of the 2ν<SUB>4</SUB>
Band of Methane
Authors: Brown, L. R.; Toth, R. A.; Hunt, R. H.; Robiette, A. G.;
Brault, J.
1978BAAS...10..558B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Solar Fourier Transform Spectroscopy
Authors: Brault, J. W.
1978fsoo.conf...33B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Laboratory Measurements of the H<SUB>2</SUB> (4,0) Quadrupole
S(1) Line and the 6800 Å Band of CH<SUB>4</SUB>.
Authors: Bergstrahl, J. T.; Brault, J. W.; Margolis, J. S.
1977BAAS....9..515B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Confirmation of the presence of iron hydride in sunspots and
cool stars.
Authors: Wing, R. F.; Cohen, J.; Brault, J. W.
1977ApJ...216..659W Altcode:
A high-resolution sunspot spectrum clearly shows the presence of the
9896-A and 8691-A bands of iron hydride (FeH). At least 332 lines of the
two bands, accounting for 80% of the lines registered in the laboratory,
can be identified with certainty in the spot spectrum; most of these
are unblended. An estimate that the 9896-A band is 2.0 + or - 0.2 times
stronger than the 8691-A band supports the idea, suggested earlier by
laboratory deuteride experiments, that the 9896-A band is the (0, 0)
transition. No evidence for FeH is found in the spectrum of the solar
disk. Image-tube spectrograms of M dwarfs and S stars have been taken
in the near-infrared at 86 A/mm to examine the feature which Nordh,
Lindgren, and Wing (1977) have proposed is due to the 9896-A band of
FeH. At this dispersion enough band structure is evident to confirm
the identification in both kinds of stars.
---------------------------------------------------------
Title: Rapid-scan high-resolution Fourier spectrometer for the
visible.
Authors: Brault, J. W.
1976JOSA...66.1081B Altcode: 1976OSAJ...66.1081B
No abstract at ADS
---------------------------------------------------------
Title: The solar beryllium abundance.
Authors: Chmielewski, Y.; Brault, J. W.; Mueller, E. A.
1975A&A....42...37C Altcode:
An interpretation of high-resolution centerlimb observations of the Be
II resonance lines in the solar spectrum is given. It is shown that to
account for the observed spectrum, it is necessary to allow for (1)
a source of additional opacity in the UV continuum which was derived
empirically for the HSRA (Harvard Smithsonian Reference Atmosphere)
and revised Holweger (1974) models and (2) departures from LTE in the Be
I-Be II system. It is found that the 2p(3)P(0) metastable level of Be I
is significantly underpopulated and that beryllium is more ionized than
expected in the case of local thermodynamic equilibrium. The kinetic
equilibrium calculations yield a logarithmic beryllium abundance of
approximately 1.15 (on the basis of a logarithmic hydrogen abundance
of 12.00), which is in agreement with previous determinations based
on the LTE assumption.
---------------------------------------------------------
Title: The Solar Lithium Abundance. I: Observations of the Solar
Lithium Feature at λ 6707.8 Å
Authors: Brault, J. W.; Mueller, E. A.
1975SoPh...41...43B Altcode:
A detailed observational study of the solar photospheric lithium
feature has been carried out with emphasis on center-limb observations,
continuum location, possible effects of telluric lines, effects of
blending by atomic and molecular lines, and decomposition of the solar
spectrum around λ6707 Å.
---------------------------------------------------------
Title: Absorption Coefficients of Selected Atmospheric Water Lines
Authors: Brault, J. W.; Fender, J. S.; Hall, D. N. B.
1975JQSRT..15..549B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: The Solar Neutral Iron Spectrum. I: Measurement of Solar Fe
I Line Profiles from Center to Limb
Authors: Lites, Bruce W.; Brault, J. W.
1973SoPh...30..283L Altcode:
Mean profiles of eighteen neutral iron lines of varying strengths were
measured at selected positions from the center of the solar disk to the
limb. These profiles were obtained by rapid photoelectric scanning of
the spectrum with a double-pass spectrometer. The Fe I lines selected
are representative of most of the stronger low-lying transitions in the
neutral iron atom. In addition to the iron lines, this observational
program includes center-to-limb measurements of three Ti II lines and
of the Ca I resonance line λ4226.7. The line profiles are presented
here in graphical form after correction for instrumental effects and
normalization to the local disk center continuum.
---------------------------------------------------------
Title: A high precision Fourier spectrometer for the visible.
Authors: Brault, J.
1972ailt.conf..367B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: A First Order Analysis of Variations of the Limb Darkening
and the Shapes for Solar Fraunhofer Lilnes
Authors: Athay, R. G.; Lites, B. W.; White, O. R.; Brault, J. W.
1972SoPh...24...18A Altcode:
New center-to-limb measurements in FeI lines show changes in both
the line profiles and the limb darkening curves that appear to be
characteristic of many other solar lines. Here we seek the constraints
placed on the atmospheric model by these effects. We find that in
addition to a depth varying source function we must also allow the
ratio of the continuous absorption coefficient to the total absorption
coefficient to pass through a minimum in the mid-photosphere. Such an
effect is consistent with inward increases of the Doppler width and
damping constant in the upper photosphere and an inward increase of
the ionization for both iron and hydrogen in the low photosphere.
---------------------------------------------------------
Title: Measurements of the limb darkening in the forbidden Mg i line
at 4571.1 Å
Authors: White, O. R.; Altrock, R. C.; Brault, J. W.; Slaughter, C. D.
1972SoPh...23...18W Altcode:
We report high resolution measurements of the center-to-limb variation
of the MgI line at 4571.1 Å. This forbidden line is of interest because
it should be formed in LTE. Comparison of our measurements with the
Harvard-Smithsonian Reference Atmosphere show that the line center
radiation originates in the temperature minimum region from 330 to 550
km above the point where τ<SUB>continuum</SUB> = 1. Observations near
the limb confirm that the temperature minimum is ∼4200K.
---------------------------------------------------------
Title: Kitt Peak solar atlas
Authors: Brault, J.
1972kpsa.book.....B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: On the Abundance of Chlorine in the Sun
Authors: Lambert, D. L.; Mallia, E. A.; Brault, J.
1971SoPh...19..289L Altcode:
A low-noise photoelectric scan which
includes the predicted position of the ClI transition
4s<SUP>4</SUP>P<SUB>5/2</SUB>-4<SUB>p</SUB><SUP>4</SUP>D<SUP>0</SUP><SUB>7/2</SUB>
provides inconclusive evidence for the presence of the line in the solar
photospheric spectrum. An upper limit logN(Cl) ⩽ 5.5 is derived. It
is pointed out that the fundamental vibration rotation band of HC1 at
3.3 μ should be detectable in the sunspot spectrum unless logN(Cl)
< 4.6. Sunspot spectra may also provide the isotopic abundance
ratio N(Cl<SUP>35</SUP>)/N(Cl<SUP>37</SUP>).
---------------------------------------------------------
Title: The Analysis and Restoration of Astronomical Data via the
Fast Fourier Transform
Authors: Brault, J. W.; White, O. R.
1971A&A....13..169B Altcode:
Since the powerful techniques developed in communications theory
have been little used to Fourier analyze astronomical measurements
and correct them for smearing, we discuss the application of
Fourier transforms and the Fast Fourier Transform algorithm to these
problems. Basic sampling theory and the discrete Fourier transform are
presented flsst, and then applied to the analysis of solar time series
and to the correction of line spectra for observational smearing. The
solution of the empirical restoration problem is based on a fflter
technique, which suppresses the noise and corrects for smearing in
an optimum fashion. Key words: restoration - power spectra - Fourier
transform - sampling
---------------------------------------------------------
Title: True Central Intensities of Fraunhofer Lines
Authors: Brault, J. W.; Slaughter, C. D.; Pierce, A. K.; Aikens, R. S.
1971SoPh...18..366B Altcode:
From observations made at Kitt Peak the true central intensities
of 40 Fraunhofer lines distributed between λλ 3083-7699, for the
center of the solar disk, are derived and given in tabular form. The
paper includes a description of the optical system - telescope and
spectrograph. The methods of observation and reduction of the data
are discussed.
---------------------------------------------------------
Title: Observations of the 5000-Å Water Vapor Band
Authors: Brault, J. W.
1969BAAS....1S.234B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: The Solar Wavelength Program-Kitt Peak National Observatory
Authors: Brault, J. W.; Breckinridge, J. B.; Pierce, A. K.
1969BAAS....1Q.235B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Phase Linearizing the Low Pass Butterworth Design
Authors: Aikens, R. S.; Brault, J. W.
1969ElDes..17...74A Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Sur la transformation numérique de Hankel et son application
à la réduction de profils instrumentaux bidimensionnels
Authors: Brault, J.
1968AnAp...31..323B Altcode:
No abstract at ADS
---------------------------------------------------------
Title: Search for a Stokes' Shift in the R<SUB>1</SUB> Lines of Ruby
Authors: Warter, Peter J., Jr.; Martinelli, Ramon U.; Brault, James W.
1965JAP....36..468W Altcode:
Virtually simultaneous measurements of the emission and absorption
profiles of the ruby R<SUB>1</SUB> line show that no significant Stokes'
shift is present. Observations were made on rubies of 0.0055% and
0.0186% Cr by weight with both crystallographic orientations and both
polarizations in the temperature range from 77° to 153°K. The position
of the peaks in the absorption line matched those of the emission line
to within 0.002 cm<SUP>-1</SUP>. Shifts of this size or smaller cause
no significant change in the operating characteristics of a laser.
---------------------------------------------------------
Title: Shuttle-Streaming: Synchronization with Heat Production in
Slime Mold
Authors: Allen, Robert D.; Reid Pitts, W., Jr.; Speir, David;
Brault, James
1963Sci...142.1485A Altcode:
Two small blobs and a channel excised from a slime mold plasmodium
were allowed to fuse into a dumbbell-shaped mass in a thermally
insulated Kamiya double chamber equipped with naked bead thermistors
in contact with the blobs. Cyclic temperature differences of from 1
× 10<SUP>-4</SUP> to 5 × 10<SUP>-2</SUP> deg Celsius were recorded
by a sensitive lock-in amplifier method with a basal noise level of
less than 2 × 10<SUP>-5</SUP> deg Celsius and a time constant of 0.5
second. The temperature differences were caused by periodic bursts of
heat production synchronized perfectly with the shuttle-streaming cycle
and invariably localized at the source rather than the destination
of the streaming cytoplasm. The results support the theory that the
motive force for cytoplasmic streaming in the slime mold is pressure,
probably generated by contraction of elements in the channel walls.
---------------------------------------------------------
Title: A New Method of Polarization Microscopic Analysis: I. Scanning
with a Birefringence Detection System
Authors: Allen, R. D.; Brault, J. W.; Moore, R. D.
1963JCBio..18..223A Altcode:
No abstract at ADS
---------------------------------------------------------
Title: The Gravitational Red Shift in the Solar Spectrum.
Authors: Brault, James William
1962PhDT........57B Altcode:
No abstract at ADS
