References of "Gosset, Eric"
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See detailWR 134 line-profile variability : preliminary results of the 1994 campaign
Gosset, Eric ULg; Vreux, Jean-Marie ULg

in Vreux, J.-M.; Detal, Alain; Fraipont-Caro, Denise (Eds.) et al Wolf-Rayet stars in the framework of stellar evolution (1996)

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See detailThe Clover Leaf Quasar H1413+117: New Photometric Light Curves
Remy, M.; Gosset, Eric ULg; Hutsemekers, Damien ULg et al

in Kochanek, C. S.; Hewitt, Jacqueline N (Eds.) Astrophysical applications of gravitational lensing: proceedings of the 173rd Symposium of the International Astronomical Union (1996)

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See detailA new orbital solution for the WNL binary system WR12
Rauw, Grégor ULg; Vreux, Jean-Marie ULg; Gosset, Eric ULg et al

in Liege International Astrophysical Colloquia (1996)

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See detailLine-profile variablity in the spectrum of WR22 around periastron: binary interaction or intrinsic variability ?
Rauw, Grégor ULg; Vreux, Jean-Marie ULg; Gosset, Eric ULg

in Liege International Astrophysical Colloquia (1996)

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See detailA Deep Multicolour CCD Survey for Quasar Candidates with the OCA Schmidt Telescope
Moreau, O.; Gosset, Eric ULg; Royer, P. et al

in ASP Conf. Series (1995), 84

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See detailWR22 as a core hydrogen-burning Wolf-Rayet star
Rauw, Grégor ULg; Vreux, Jean-Marie ULg; Gosset, Eric ULg et al

in Stellar evolution: what should be done; 32nd Liege International Astrophysical Coll. (1995)

The analysis of an extensive sample of high resolution spectra of the Wolf-Rayet binary WR22 recently allowed us to determine a minimum mass of 72 M_solar for the WN7 star. With such a high mass, WR22 is ... [more ▼]

The analysis of an extensive sample of high resolution spectra of the Wolf-Rayet binary WR22 recently allowed us to determine a minimum mass of 72 M_solar for the WN7 star. With such a high mass, WR22 is expected to be a core H-Burning star which has just evolved from a progenitor of at least 90-110 M_solar. [less ▲]

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See detailA seven year campaign on WR 22
Rauw, Grégor ULg; Vreux, Jean-Marie ULg; Gosset, Eric ULg et al

in Wolf-Rayet Stars: Binaries; Colliding Winds; Evolution. International Astronomical Union. Symposium no. 163 (1995)

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See detailFurther results on the line-profile variability of WR 134
Gosset, Eric ULg; Vreux, Jean-Marie ULg; Andrillat, Y.

in Astrophysics & Space Science (1994, November 01), 221

We discuss a few conclusions previously derived from the analysis of the line-profile variability of the Wolf-Rayet star WR 134, some details are made more explicit. In addition, we present a new set of ... [more ▼]

We discuss a few conclusions previously derived from the analysis of the line-profile variability of the Wolf-Rayet star WR 134, some details are made more explicit. In addition, we present a new set of data and briefly comment on recent results deduced from its analysis. [less ▲]

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See detailA dusty nebula around the luminous blue variable candidate HD 168625
Hutsemekers, Damien ULg; van Drom, E.; Gosset, Eric ULg et al

in Astronomy and Astrophysics (1994), 290

On the basis of narrow-band visible and near-infrared imagery as well as high-resolution spectroscopy, we report the discovery of a new LBV-type nebula around the B supergiant HD 168625. We find that it ... [more ▼]

On the basis of narrow-band visible and near-infrared imagery as well as high-resolution spectroscopy, we report the discovery of a new LBV-type nebula around the B supergiant HD 168625. We find that it essentially consists of a dusty expanding shell from which seems to emerge a bipolar emission nebula, the whole embedded in a reflection nebulosity. The inner shell is stratified: the continuum emission arises beyond the ionized gas, and is possibly due to scattering of stellar light by large dust grains or to non-equilibrium dust emission. The unexpected presence of unidentified infrared emission bands (UIRs) in the spectrum of this object is also discussed. We finally report the non-detection of a comparable nebula around the nearby LBV HD 168607. [less ▲]

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See detailPhotometric monitoring of Wolf-Rayet stars: Strömgren uvby and narrow-band photometry
Gosset, Eric ULg; Rauw, Grégor ULg; Manfroid, Jean ULg et al

in NATO ASIC Proc. 436: The Impact of Long-Term Monitoring on Variable Star Research: Astrophysics (1994)

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See detailEtude de la variabilité des étoiles de type Wolf-Rayet
Gosset, Eric ULg; Vreux, Jean-Marie ULg

Book published by Académie royale de Belgique - Académie royale de Belgique (1994)

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See detailSystematic Search for Quasar Candidates using the MAMA Microdensitometer
Moreau, O.; Gosset, Eric ULg; Reboul, H. et al

in Mc Gillivray, H. T.; Thomson, E. B.; Lasker, B. M. (Eds.) et al Astronomy from wide-field imaging (1994)

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See detailOn the linearity of ESO CCD#9 at CAT+CES.
Gosset, Eric ULg; Magain, Pierre ULg

in The Messenger (1993), 73

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See detailGalaxies statistics around highly luminous quasars: the ESO Sample
van Drom, E.; Surdej, Jean ULg; Magain, Pierre ULg et al

in Surdej, Jean; Fraipont-Caro, Denise; Gosset, Eric (Eds.) et al The proceedings of the 31st Liège International Astrophysical Colloquium "Gravitational lenses in the Universe" (1993)

We present observational evidence on the correlation between the positions of Highly Luminous Quasars and those of galaxies for a sample of 136 objects, observed under good seeing conditions.

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See detailSystematic search for gravitational mirages among general quasar samples
Moreau, O.; Claeskens, Jean-François ULg; Gosset, Eric ULg et al

in Surdej, Jean; Fraipont-Caro, Denise; Gosset, Eric (Eds.) et al The proceedings of the 31st Liège International Astrophysical Colloquium "Gravitational lenses in (1993)

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See detailThe cloverleaf quasar H1413+117: a preliminary light curve
Arnould, P.; Remy, M.; Gosset, Eric ULg et al

in Surdej, Jean; Fraipont-Caro, Denise; Gosset, Eric (Eds.) et al The proceedings of the 31st Liège International Astrophysical Colloquium "Gravitational lenses in the Universe" (1993)

The cloverleaf quasar H1413+117 was discovered to be a gravitational lens system in 1988. Since then, it has been photometrically monitored essentially as part of the ESO key-program Gravitational lensing ... [more ▼]

The cloverleaf quasar H1413+117 was discovered to be a gravitational lens system in 1988. Since then, it has been photometrically monitored essentially as part of the ESO key-program Gravitational lensing: we present here a first preliminary lightcurve for its four individual images. [less ▲]

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See detail'Gravitational lenses in the Universe', The proceedings of the 31st Liège International Astrophysical Colloquium
Surdej, Jean ULg; Fraipont-Caro, D.; Gosset, Eric ULg et al

Book published by Université de Liège (1993)

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See detailPhotometric accuracy - The impact of extrapolation in differing color-transformation schemes
Manfroid, Jean ULg; Sterken, C.; Gosset, Eric ULg

in Astronomy and Astrophysics (1992), 264

We discuss photometric errors that arise from the use of differing color-transformation schemes when extrapolating outside the range of the standard values that define the system. An example based on data ... [more ▼]

We discuss photometric errors that arise from the use of differing color-transformation schemes when extrapolating outside the range of the standard values that define the system. An example based on data from the Long-Term Photometry of Variables project (LTPV) at ESO is analyzed. Practically, the extrapolation errors are most evident as systematic brightness jumps of some program stars, seen when monitored over several observing runs. Conclusions are drawn about the choice of standard stars in the Stromgren system. [less ▲]

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See detailThe Beta Pictoris circumstellar disk. XIII - Survey of the variable CA II lines
Lagrange-Henri, A. M.; Gosset, Eric ULg; Beust, H. et al

in Astronomy and Astrophysics (1992), 264

Over 200 Ca II K and H spectra of Beta Pictoris taken between September 19, 1989 and December 19, 1990 are presented. Many new variable features are observed, at low and high redshifts, together with a ... [more ▼]

Over 200 Ca II K and H spectra of Beta Pictoris taken between September 19, 1989 and December 19, 1990 are presented. Many new variable features are observed, at low and high redshifts, together with a few blueshifted ones. The time scales for the variations are shown to be strongly dependent on the redshift of the variable lines. A rate of events of about 200/yr is derived; it is also shown that in some cases the absorbing cloud covers less than 40 percent of the stellar surface. The observed variations are analyzed and compared to those observed in the UV. These observations make it possible to test the present scenario of evaporating infalling bodies, in terms of velocity of variable lines, occurrence of variable events, small time-scale variations, and size of the absorbing cloud. It is shown that the observed velocity range for the variable components may be explained by the present scenario, as well as the size of the absorbing clouds. [less ▲]

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See detailWR 134 line-profile variability revisited
Vreux, Jean-Marie ULg; Gosset, Eric ULg; Bohannan, B. et al

in Astronomy and Astrophysics (1992), 256

Line profile variations of WR 134 are analyzed on more than 200 spectra collected at Haute Provence Observatory and at Kitt Peak National Observatory. No conclusive evidence is found for a periodic ... [more ▼]

Line profile variations of WR 134 are analyzed on more than 200 spectra collected at Haute Provence Observatory and at Kitt Peak National Observatory. No conclusive evidence is found for a periodic behavior. However, for some frequencies, for example, the ones close to nu = (n x 0.5)/d, the data are ill-distributed, and the existence of a related periodic phenomenon cannot be completely ruled out. This does not mean that the variability presents a purely random behavior. Several new characteristics of the observed deformations are extracted from the analysis of the spectra and it is tentatively suggested that these could be the signature of a bipolar flow. [less ▲]

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