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Author name code: houtgast
ADS astronomy entries on 2022-09-14
author:"Houtgast, Jakob"
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Title: In de schaduw van de maan.
Authors: Houtgast, J.
1981Zenit...8..444H Altcode:
No abstract at ADS
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Title: Report on the Dutch expedition to observe the 1973 June 30
solar eclipse I.
Authors: Houtgast, J.; Namba, O.
1979PRNAA..82..209H Altcode: 1979RNAAS..82..209H
No abstract at ADS
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Title: Report on the Dutch expedition to observe the 1973 June 30
solar eclipse. I, II.
Authors: Houtgast, J.; Namba, O.
1979PKNAW..82..209H Altcode:
No abstract at ADS
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Title: Report on the Dutch expedition to observe the 1973 june 30
solar eclipse (II)
Authors: Houtgast, J.; Namba, O.
1979PRNAA..82..223H Altcode: 1979RNAAS..82..223H
No abstract at ADS
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Title: Book reviews
Authors: van Diggelen, J.; Ne'Eman, Yuval; Nyboer, B. R. A.; Kleczek,
J.; Dobrzycki, Jerzy; Hartmann, G.; Swider, W.; Hempenius, S. A.;
de Jager, C.; 't Hooft, G.; Radelaar, S.; Wisse, J. A.; de Jong, T.;
Houtgast, J.; Bezemer, J.
1978SSRv...21..703V Altcode:
No abstract at ADS
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Title: Report of the Dutch expedition to the 1970 March 7 solar
eclipse.
Authors: Houtgast, J.; Namba, C.; Rutten, R. J.
1976PKNAW..79..221H Altcode:
No abstract at ADS
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Title: Report of the Dutch expedition to the 1970 March 7 solar
eclipse. Ch. 1.
Authors: Houtgast, J.; Namba, O.; Rutten, R. J.
1976seob.conf....3H Altcode:
No abstract at ADS
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Title: Report of the Dutch expedition to the 1970 March 7 solar
eclipse.
Authors: Houtgast, J.; Namba, O.; Rutten, R. J.
1976PRNAA..79..221H Altcode: 1976RNAAS..79..221H
No abstract at ADS
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Title: A 16-mm film "Solar spectrum at the extreme limb observed
during the 1973 June 30 total eclipse at Atar, Mauritania.
Authors: Houtgast, J.; Namba, O.
1975MmArc.105..115H Altcode:
No abstract at ADS
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Title: A 16-mm film "Solar spectrum at the extreme limb observed
during the 1973 June 30 total eclipse at Atar, Mauritania"
Authors: Houtgast, J.; Namba, O.
1975cesra...5..115H Altcode:
No abstract at ADS
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Title: Line-Intensities in the Photosphere-Chromosphere Transition
Region. II: Observational Material from the 1961 Eclipse at Brač
Authors: Van Dessel, E. L.; Houtgast, J.; Koelbloed, D.
1973SoPh...33..375V Altcode:
We present results from eclipse spectra in the wavelength region
4588-4682 Å, taken during the eclipse of February 15, 1961 at Brač,
Yugoslavia. Absolute line intensities have been determined in the
photosphere-chromosphere transition region. The method of reduction is
discussed in Section 2 and the observed variation of the total intensity
as a function of the height is shown for a number of lines in Figures
5-8. The results for the Fe I lines are compared with computations
(as described in Paper I: van Dessel, 1970) for various solar model
atmospheres (Section 4). The model, which combines Holweger's (1967)
temperature distribution for the excitation temperature with the HSRA
model (Gingerich et al., 1971) for the electron temperature, yields
a better agreement than all pure LTE-models.
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Title: The Representation of the Semi-Annual Variation of the
Geomagnetic Activity by an Annual Sine Wave
Authors: Houtgast, J.; Van Sluiters, A.
1973SoPh...31..513H Altcode:
The seasonal variation of the geomagnetic activity shows two sharp
maxima (in March and September) and two broader minima (in June and
December). It can only poorly be described by a double sine wave.
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Title: Spectral Lines from Photosphere to Chromosphere, Observed
During the March 1970 Eclipse; A First Comparison with Theory (Papers
presented at the Proceedings of the International Symposium on the
1970 Solar Eclipse, held in Seattle, U. S. A. , 18-21 June, 1971.)
Authors: Houtgast, J.; Namba, O.; Rutten, R. J.; Wijbenga, J. W.
1971SoPh...21..281H Altcode: 1972SoPh...21..281H
A brief report is presented on observations of line profile variations
in the transition region from the photosphere to the chromosphere,
based on high-resolution eclipse spectrograms. We also show some
computations for several lines whose behaviour agrees in general with
the observations.
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Title: The International Symposium on the 1970 solar eclipse.
Authors: Houtgast, J.
1971SoPh...21..259H Altcode: 1971SoPh...21..259.
No abstract at ADS
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Title: Solar Physics at the Utrecht Astronomical INstitute
Authors: Fokker, A. D.; Houtgast, J.; De Jager, C.
1971SoPh...16..227F Altcode:
No abstract at ADS
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Title: Description of an Observational Method for Determining Absolute
Intensities in the Solar Spectrum between λ 2962 Å and λ 4087 Å
Authors: Houtgast, J.
1970SoPh...15..273H Altcode:
The results of measurements of absolute intensities in the spectrum
of the centre of the sun's disk in the wavelength region 2977-4087
Å have already been published (Houtgast 1965, 1968) and use has
been made of them on different occasions. The intensities at 206
spectral points have been given, chosen as much as possible between
the Fraunhofer lines, but well divided over the region. Each strip of
the Utrecht (Minnaert et al., 1940) and Göttingen (Brückner, 1960)
Atlases contains at least two points. Later (Houtgast and Namba, 1968)
four more points were added below λ 2977 Å.
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Title: Variations in Line Profiles from Photosphere to Chromosphere
Authors: Houtgast, J.; Namba, O.; Rutten, R. J.; de Graauw, Th.
1970Natur.226.1144H Altcode:
No abstract at ADS
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Title: M. G. J. Minnaert, died October 26, 1970.
Authors: Houtgast, J.
1970HemD...68..289H Altcode:
No abstract at ADS
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Title: Equator-Pole Effect in the Central Intensities of Some Strong
Solar Fraunhofer Lines
Authors: Burger, Marijke; Houtgast, J.
1969SoPh....9..296B Altcode:
Uncorrected central intensities of the Fraunhofer lines NaD<SUB>1</SUB>
and D<SUB>2</SUB>, Mgb<SUB>1</SUB> and b<SUB>2</SUB>, and Hβ have
been determined at a number of points along the S-W limb of the sun,
from equator to pole, using photographic spectra taken at the Locarno
station of the Göttingen Observatory. No significant pole-equator
variation could be found in excess of the observational errors which
are of the order of 2%.
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Title: De Siberische zonsverduistering van 22 september 1968.
Authors: Houtgast, J.
1969HemD...67...31H Altcode:
No abstract at ADS
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Title: Continuum location and total line absorption in the solar
spectrum from 2988 to 4087 A
Authors: Houtgast, J.; Namba, O.
1968BAN....20...87H Altcode:
No abstract at ADS
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Title: Book review
Authors: Houtgast, J.
1968SoPh....4..126H Altcode: 1968SoPh....4..126.
No abstract at ADS
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Title: The Occurrence and Possible Meaning of the 'nimbus'
Authors: Houtgast, J.
1968IAUS...35..483H Altcode:
No abstract at ADS
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Title: The High-Dispersion Continuous Ultraviolet Solar Spectrum
and the Balmer-Jump
Authors: Houtgast, J.
1968SoPh....3...47H Altcode:
Among the intensities, determined at about 200 wavelengths between λ
3000 and λ 4100 Å in the spectrum of the centre of the sun's disk
(HOUTGAST, 1965), the 32 highest ones (windows) were plotted and
compared with absolute intensities given by other authors.
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Title: The continuum background in the Utrecht Photometric Atlas,
as assumed for the 1966 catalogue
Authors: Houtgast, J.; Minnaert, M. G. J.
1968BANS....2..415H Altcode: 1967BANS....2..415H
No abstract at ADS
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Title: The geomagnetic activity around conjunction and opposition
of planets
Authors: Houtgast, J.; van Sluiters, A.
1967maco.conf..399H Altcode:
No abstract at ADS
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Title: The solar spectrum 2935 A to 8770 A
Authors: Moore, Charlotte E.; Minnaert, M. G. J.; Houtgast, J.
1966sst..book.....M Altcode:
No abstract at ADS
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Title: Uncertainties in the Determination of Equivalent Widths
Authors: Houtgast, J.
1966IAUS...26...38H Altcode:
No abstract at ADS
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Title: Report of the Working Group on Solar Eclipses
Authors: Houtgast, J.
1966IAUTB..12..170H Altcode:
No abstract at ADS
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Title: Hα-absorption in the solar flare nimbus of June 1, 1960
Authors: Houtgast, J.
1963BAN....17...56H Altcode:
No abstract at ADS
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Title: A New Estimate of the Strength of the Magnetic Field of the
Planet Venus
Authors: Houtgast, J.; van Sluiters, A.
1962Natur.196..462H Altcode:
IN some earlier publications<SUP>1</SUP>, attention was directed to
the behaviour of the geomagnetic activity around the dates of lower
conjunction of Venus. It appeared that, especially at times of weak
solar activity and with conjunctions, where Venus passed the Sun at
a small angular distance, seen from the Earth, a screening effoct of
Venus on the solar corpuscula was found from 6 days before up to 1
day after the date of conjunction. An estimate of the strength of the
magnetic field of Venus met with difficulties.
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Title: Absolute intensities of strong chromospheric emission lines
of H He and Ca II at the eclipse of 30 June 1954
Authors: Houtgast, J.
1962BAN....16..115H Altcode:
No abstract at ADS
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Title: Report of the Netherlands expedition for the observation of
the total solar eclispe on February 15, 1961.
Authors: Houtgast, J.
1962PRNAA..65..313H Altcode: 1962RNAAS..65..313H
No abstract at ADS
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Title: Report of the Netherlands expedition for the observation of
the total solar eclipse on october 2, 1959.
Authors: Houtgast, J.
1960PRNAA..63..611H Altcode: 1960RNAAS..63..611H
No abstract at ADS
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Title: Quantitative photometric measurements with a Lyot filter
Authors: van Griethuysen, I. G.; Houtgast, J.
1959BAN....14..279V Altcode:
No abstract at ADS
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Title: Line intensities in the flash spectrum of the total solar
eclipse at Khartoum, February 25, 1952.
Authors: Houtgast, Jakob
1957lifs.book.....H Altcode: 1957QB4.U8l13p3....
No abstract at ADS
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Title: Line intensities in the flash spectrum of the total solar
eclipse at Khartoum, February 25, 1952
Authors: Houtgast, Jakob
1957RAOU....3.....H Altcode:
No abstract at ADS
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Title: The influence of the inner planets on the earth's magnetic
field
Authors: Houtgast, J.
1956sei..conf..302H Altcode:
No abstract at ADS
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Title: Report of the Netherlands expedition to Ceylon.
Authors: Houtgast, J.
1956PRNAA..59..335H Altcode: 1956RNAAS..59..335H
No abstract at ADS
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Title: Indication of a Magnetic Field of the Planet Venus
Authors: Houtgast, J.
1955Natur.175..678H Altcode:
IF Venus had a magnetic field, it would at inferior conjunctions
influence the corpuscular streams from the sun to the earth. We
should expect a variation, probably a decrease, of the corpuscular
intensity, which could reflect itself in the international daily
magnetic character figures.
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Title: Absolute intensities in high dispersion solar spectra between
3000 and .4000 Angstrom.
Authors: Houtgast, J.
1955PRNAA..58..306H Altcode: 1955RNAAS..58..306H
No abstract at ADS
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Title: Preliminary report concerning the eclipse of June 30 1954
and the Dutch expedition to Gotland.
Authors: Houtgast, J.; van Heel, A. C. S.; Minnaert, M. G. J.
1954PRNAA..57..596H Altcode: 1954RNAAS..57..596H
No abstract at ADS
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Title: Observations and computations about centre limb variations
of Fraunhofer lines
Authors: Houtgast, J.
1952BAN....11..475H Altcode:
No abstract at ADS
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Title: A Photometric Investigation of the Sky-Light from Sunset
to Sunrise
Authors: Houtgast, J.
1952LIACo...3..117H Altcode:
No abstract at ADS
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Title: Observations du rayonnement solaire sur la longueur d'onde
de 55 centimètres
Authors: Laffineur, Marius; Houtgast, Jakob
1949AnAp...12..137L Altcode:
No abstract at ADS
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Title: The self-recording microphotometer of the Utrecht Observatory
Authors: Houtgast, J.
1948BAN....10..417H Altcode:
No abstract at ADS
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Title: Statistical investigations concerning the magnetic fields of
sunspots I
Authors: Houtgast, J.; van Sluiters, A.
1948BAN....10..325H Altcode:
No abstract at ADS
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Title: Visual intensity estimates on atmospheric lines of water-vapour
in the solar spectrum
Authors: Houtgast, J.; Hollander, J. A.; Boomsma, L. D.
1948BAN....10..334H Altcode:
No abstract at ADS
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Title: The variations in the profiles of strong Fraunhofer lines
along a radius of the solar disc
Authors: Houtgast, Jakob
1942PhDT........12H Altcode: 1942vpsf.book.....H; 1942QB551.H68......
No abstract at ADS
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Title: L'Atlas Photometrique de Spectre Solaire.
Authors: Mulder, G. -F. -W.; Houtgast, J.; Chalonge, D.
1942LAstr..56..166M Altcode:
No abstract at ADS
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Title: Photometric Atlas of the solar Spectrum (Observatoire <<
Sonnenborgh >>)
Authors: Minnaert, M.; Mulders, G. F. W.; Houtgast, J.
1941AnAp....4..136M Altcode:
No abstract at ADS
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Title: Bestimmung der Dämpfung zweier FeMultipletts für Mitte
und Rand der Sonnenscheibe. (Mitteilungen des Astrophysikalischen
Observatoriums, Potsdam, Nr. 7. ) Mit 6 Abbildungen.
Authors: ten Bruggencate, P.; Houtgast, J.
1941ZA.....20..149T Altcode:
No abstract at ADS
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Title: Photometric atlas of the solar spectrum from [lambda] 3612 to
[lambda] 8771 with an appendix from [lambda] 3332 to [lambda] 3637
Authors: Minnaert, M.; Houtgast, J.; Mulders, G. F. W.
1940pass.book.....M Altcode:
No abstract at ADS
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Title: Beobachtungs- und Reduktionstechnik bei den Potsdamer
Sspektralphotometrischen Untersuchungen von Fraunhoffer-Linien
Authors: ten Bruggencate, Paul; Houtgast, Jakob; von Kluber, Harald
1939POPot...3.....T Altcode: 1939POPot...3.....B
No abstract at ADS
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Title: Number 96. Band 29. Heft 3. Beobachtungs-und reduktionstechnik
bei den potsdamer spektral photometrischen untersuchungen von
fraunhofer-linien
Authors: Bruggencate, P.; Houtgast, J.; Kluber, H.
1939POPot..29C...1B Altcode:
No abstract at ADS
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Title: Beobachtungen der Mitte-Randänderungen von starken FRAUNHOFER
schen Linien. Mit 4 Abbildungen.
Authors: Houtgast, J.
1938ZA.....16...43H Altcode:
No abstract at ADS
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Title: Direct Registration of Intensities in Spectrophotometric
Work. Mit 3 Abbildungen.
Authors: Minnaert, M.; Houtgast, J.
1938ZA.....15..354M Altcode:
No abstract at ADS
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Title: Flügelprofile von starken Fraunhoferschen Linien als Funktion
des Abstandes vom Zentrum der Sonnenscheibe. Mit 8 Abbildungen.
Authors: Minnaert, M.; Houtgast, J.
1936ZA.....12...81M Altcode:
No abstract at ADS
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Title: Photometrische Untersuchungen über das Funkeln der
Fixsterne. (Mitteilung aus dem Heliophysikalischen Institutdes
Physikalischen Laboratoriums Utrecht.) Mit 11 Abbildungen.
Authors: Minnaert, M.; Houtgast, J.
1935ZA.....10...86M Altcode:
No abstract at ADS
