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See detailForbidden transitions of Astrophysical Interest in the 5pk (k=1-5) Configurations
Biémont, Emile ULg; Hansen, J. E.; Quinet, Pascal ULg et al

in Astronomy and Astrophysics. Supplement Series (1995), 111

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See detailInteresting Lines in the Infrared Solar Spectrum. II. Unblended Lines between 1.0 and 1.8µm
Ramsauer, J.; Solanki, S. K.; Biémont, Emile ULg

in Astronomy and Astrophysics. Supplement Series (1995), 113

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See detailResonance transitions in Neutral Chlorine
Biémont, Emile ULg; Gebarowski, R.; Zeippen, C. J.

in Astronomy and Astrophysics. Supplement Series (1994), 287

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See detailLongterm Photometry of Variables at ESO - Part Two - the Second Data Catalogue 1986-1990
Sterken, C.; Manfroid, Jean ULg; Anton, K. et al

in Astronomy and Astrophysics. Supplement Series (1993), 102

In this paper we present the second catalogue of photometric data in the Strömgren system obtained during the period October 1986- September 1990 in the framework of the Long-Term Photometry of Variables ... [more ▼]

In this paper we present the second catalogue of photometric data in the Strömgren system obtained during the period October 1986- September 1990 in the framework of the Long-Term Photometry of Variables (LTPV) program at the European Southern Observatory. The catalogue is available in computer readable form at the Centre de Données de Strasbourg. [less ▲]

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See detailThird supplement to the catalogue of observed periods of Ap stars
Catalano, F. A.; Renson, Pierre ULg; Leone, F.

in Astronomy and Astrophysics. Supplement Series (1993), 98

New data on the periods of Ap stars with references are presented. Twelve further stars are introduced for which a periodic variability has recently been discovered or not reported in previous issues of ... [more ▼]

New data on the periods of Ap stars with references are presented. Twelve further stars are introduced for which a periodic variability has recently been discovered or not reported in previous issues of this catalog. For many stars also present in previous issues of the catalog new determinations of the periods are given. Recently attributed variable star names are also quoted. [less ▲]

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See detailAccurate f-values of Astrophysical Interest in neutral Carbon
Hibbert, A.; Biémont, Emile ULg; Godefroid, M. et al

in Astronomy and Astrophysics. Supplement Series (1993), 99

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See detailn < 2 Allowed Transitions in Neutral Sulfur within in the Visible and Infrared Spectral Ranges
Biémont, Emile ULg; Quinet, Pascal ULg; Zeippen, C. J.

in Astronomy and Astrophysics. Supplement Series (1993), 102

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See detailJHKLM standard stars in the ESO system
Bouchet, P.; Schmider, F. X.; Manfroid, Jean ULg

in Astronomy and Astrophysics. Supplement Series (1991), 91

A list of 199 standard stars suitable for the ESO standard photometric system at JHKLM is given. Faint stars (although brighter than K = 7.7) to be used on larger telescopes are included. This list is ... [more ▼]

A list of 199 standard stars suitable for the ESO standard photometric system at JHKLM is given. Faint stars (although brighter than K = 7.7) to be used on larger telescopes are included. This list is based on an analysis of all infrared photometric observations carried out at La Silla from 1979 until 1989 inclusive. The accuracy of the data (about 0.02 mag. at J, H, K, L, and M) is similar to the one achieved at SAAO and CTIO. Comparisons with these systems, as well as with the AAO and MSSO systems, are made: it is shown that the ESO system is very close to the other ones, with the exception of CTIOs. [less ▲]

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See detailA photometric study of the bright cloud B in Sagittarius. VII - 1165 new variable stars and 65 diffuse objects
Terzan, A.; Gosset, Eric ULg

in Astronomy and Astrophysics. Supplement Series (1991), 90

A field in the Sagittarian bright cloud in the direction of the Galactic center is investigated by means of the B, V, and R Schmidt plates at the ESO, and 1165 variable stars are reported. The position, R ... [more ▼]

A field in the Sagittarian bright cloud in the direction of the Galactic center is investigated by means of the B, V, and R Schmidt plates at the ESO, and 1165 variable stars are reported. The position, R magnitudes, epochs, and amplitudes of variation are given for each star, and the surface density per square degree of variable stars increases from 1.7 to 65. The number of variables in the present field is similar to that for field A, and variables of type L and/or M are more densely numerous toward the center of the Galaxy than at other locations. Of the objects listed, 65 are given with potential classifications based on morphological data from the B and R Schmidt plates. The preliminary observations suggest a success rate of 42 percent on the precise prediction of the object types. [less ▲]

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See detailThe photometric variations of the Ap star HD34631
Manfroid, Jean ULg; Renson, Pierre ULg; Catalano, F. A. et al

in Astronomy and Astrophysics. Supplement Series (1991), 90

The photometric behavior in the uvby system of the Ap star HD34631 has been reanalyzed on the basis of data collected over a time span of 16 years. A more accurate value of the period is deduced: P = 2 ... [more ▼]

The photometric behavior in the uvby system of the Ap star HD34631 has been reanalyzed on the basis of data collected over a time span of 16 years. A more accurate value of the period is deduced: P = 2.20269 +/-0.00004d. The lightcurves show a double-wave shape. The variations are smallest in the v band. [less ▲]

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See detailGeneral catalogue of Ap and Am stars
Renson, Pierre ULg; Gerbaldi, M.; Catalano, F. A.

in Astronomy and Astrophysics. Supplement Series (1991), 89

A catalog of all the known Ap and Am stars, containing a total of 6684 objects, was prepared. The few stars that were wrongly considered as Ap or Am star are noted as well as some others for which their ... [more ▼]

A catalog of all the known Ap and Am stars, containing a total of 6684 objects, was prepared. The few stars that were wrongly considered as Ap or Am star are noted as well as some others for which their identity as Ap or Am stars is not yet well established. The catalog gives the identificators and the main observational data for each star, including the magnitude, color, spectral type, duplicity, periodicity, magnetic field, and projected rotational velocity. [less ▲]

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See detailStromgren six-colour photometry of SN 1987 A. I - Days 1 to 330
Helt, B. E.; Bibo, E. A.; Cuypers, J. et al

in Astronomy and Astrophysics. Supplement Series (1991), 89

Results are presented of photometric observations of SN1987A with the Danish 0.5-m telescope at La Silla for the period February 1987-January 1988, including color lines and magnitudes from day 1 to day ... [more ▼]

Results are presented of photometric observations of SN1987A with the Danish 0.5-m telescope at La Silla for the period February 1987-January 1988, including color lines and magnitudes from day 1 to day 300. For the first time, flux calibrations for H-beta passbands were derived. Included are also improved flux calibrations for the uvby passbands. [less ▲]

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See detailA database of Ap stars
Renson, Pierre ULg; Kobi, D.; North, P.

in Astronomy and Astrophysics. Supplement Series (1991), 89

A database for 3195 Ap stars, which can be used on an IBM-compatible personal computer, is described. It is essentially based on Renson's general catalogue of Ap and Am stars, but contains much additional ... [more ▼]

A database for 3195 Ap stars, which can be used on an IBM-compatible personal computer, is described. It is essentially based on Renson's general catalogue of Ap and Am stars, but contains much additional information. It operates within the Dbase III Plus system. [less ▲]

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See detailLong-term photometry of variables at ESO. I - The first data catalogue (1982-1986)
Manfroid, Jean ULg; Sterken, C.; Bruch, A. et al

in Astronomy and Astrophysics. Supplement Series (1991), 87

This paper presents the catalog of photometric data in the Stromgren system obtained during the first four years (October 1982 - September 1986) of the Long-Term Photometry of Variables (LTPV) program at ... [more ▼]

This paper presents the catalog of photometric data in the Stromgren system obtained during the first four years (October 1982 - September 1986) of the Long-Term Photometry of Variables (LTPV) program at ESO. The data are available in computer-readable form. [less ▲]

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See detailSecond supplement to the catalogue of observed periods of Ap stars
Catalano, F. A.; Renson, Pierre ULg; Leone, F.

in Astronomy and Astrophysics. Supplement Series (1991), 87

Supplementary data on the periods of Ap stars with references are presented 20 new stars are introduced for which a periodic variability has been discovered since 1987 or it was known before but it was ... [more ▼]

Supplementary data on the periods of Ap stars with references are presented 20 new stars are introduced for which a periodic variability has been discovered since 1987 or it was known before but it was not reported in the previous issues of this catalogue. For many of the stars in the previous catalogues new determinations of the period are introduced. Recently attributed variable star names are also reported. [less ▲]

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See detailMiscellaneous spectroscopic observations of quasars and quasar candidates
Veron, P.; Veron-Cetty, M.-P.; Djorgovski, S. et al

in Astronomy and Astrophysics. Supplement Series (1990), 86

Spectroscopic observations are presented for 11 quasar candidates, as well as 19 quasars with uncertain redshift, three BL Lac candidates, and 11 objects located within a few arcsec of a quasar. The ... [more ▼]

Spectroscopic observations are presented for 11 quasar candidates, as well as 19 quasars with uncertain redshift, three BL Lac candidates, and 11 objects located within a few arcsec of a quasar. The spectra indicate than nine of the 11 quasar candidates are stars, while the remaining two are low-redshift galaxies. The individual objects studied and commented on include KPNO 1, CFHT 2, Q 0010+023, UM 232, UM 473, WEE 124, UM 644, PKS 1514+197, MC3 1639+155, and WEE 185. [less ▲]

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See detailThe chemical composition of the extreme halo stars. III - Equivalent widths of 20 dwarfs
Zhao, G.; Magain, Pierre ULg

in Astronomy and Astrophysics. Supplement Series (1990), 86

In the first two papers of this series the chemical composition of 20 extreme halo stars was discussed. The abundances of a number of elements were determined using model atmosphere analysis of equivalent ... [more ▼]

In the first two papers of this series the chemical composition of 20 extreme halo stars was discussed. The abundances of a number of elements were determined using model atmosphere analysis of equivalent widths. In this paper a tabulation of the equivalent width data is presented. A comparison of the measurements with the equivalent widths from different sources is used to assess the quality of the data. [less ▲]

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See detailAnalysis of the light variations of the Wolf-Rayet star WR16
Gosset, Eric ULg; Vreux, Jean-Marie ULg; Manfroid, Jean ULg et al

in Astronomy and Astrophysics. Supplement Series (1990), 84

This paper presents new data sets of Stromgren differential photometry observations of the Wolf-Rayet star WR16, collected at the ESO (La Silla, Chile). Results of detailed data analyses support previous ... [more ▼]

This paper presents new data sets of Stromgren differential photometry observations of the Wolf-Rayet star WR16, collected at the ESO (La Silla, Chile). Results of detailed data analyses support previous findings concerning the variability of WR16, with dominating power at frequencies below 1.5/d. The variations were found to be positively correlated on time lags up to about two days, a characteristic delay larger than the time of replacement of a typical WR star wind. A simple stochastic model is developed for the low frequency variability of the star, which is able to explain the available observations. [less ▲]

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See detailInfrared photometry and spectrophotometry of SN 1987A. I - March to October 1987 observations
Bouchet, P.; Slezak, E.; Le Bertre, T. et al

in Astronomy and Astrophysics. Supplement Series (1989), 80

IR (1-20 micron) observations, photometry, and narrow band spectrophotometry of SN 1987A obtained between March 16 and October 12, 1987, are presented. Variations of the bolometric luminosity are ... [more ▼]

IR (1-20 micron) observations, photometry, and narrow band spectrophotometry of SN 1987A obtained between March 16 and October 12, 1987, are presented. Variations of the bolometric luminosity are determined from IR and optical photometry. The spectral energy distribution, effective radius, and effective temperature of the hotter component are derived. Also, observations of hydrogen lines and CO emission are discussed. [less ▲]

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See detailErratum et addendum- Catalogue of Ap-Stars and Am-Stars in Open Clusters
Renson, Pierre ULg

in Astronomy and Astrophysics. Supplement Series (1989), 78

Not Available

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