Physical Properties of the 0.94-Day Period Transiting Planetary System WASP-18 (2009)
Southworth, John, Hinse, T C, Dominik, M, Glitrup, M, Jørgensen, U G, Liebig, C, ...
We present high-precision photometry of five consecutive transits of WASP-18, an extrasolar planetary system with one of the shortest orbital periods known. Through the use of telescope defocusing we...
Southworth, John, Hinse, T C, Burgdorf, M J, Dominik, M, Hornstrup, A, Jørgensen, U G, ...
We present and analyse light curves of four transits of the Southern hemisphere extrasolar planetary system WASP-4, obtained with a telescope defocused so the radius of each point spread function was...
High-precision photometry by telescope defocusing - I. The transiting planetary system WASP-5 (2009)
Southworth, John, Hinse, T C, Jørgensen, U G, Dominik, M, Ricci, Davide, Burgdorf, M J, ...
We present high-precision photometry of two transit events of the extrasolar planetary system WASP-5, obtained with the Danish 1.54-m telescope at European Southern Obseratory La Silla. In order to...
Ollivier, M, Absil, Olivier, Allard, F, Berger, J-P, Bordé, P, Cassaing, F, ...
PEGASE is a mission dedicated to the exploration of the environment (including habitable zone) of young and solar-type stars (particularly those in the DARWIN catalogue) and the observation of low...
Nakos, Th, Willis, J P, Andreon, S, Surdej, Jean, Riaud, Pierre, Hatziminaoglou, E, ...
Aims. We present a sample of candidate quasars selected using the KX-technique. The data cover 0.68 deg[SUP]2[/SUP] of the X-ray Multi-Mirror (XMM) Large-Scale Structure (LSS) survey area where...
Milli-arcsecond Astrophysics with VSI, the VLTI Spectro-imager in the ELT Era (2009)
Malbet, F, Buscher, D, Weigelt, G, Garcia, P, Gai, M, Lorenzetti, D, ...
Nowadays, compact sources relatively warm like surfaces of nearby stars, circumstellar environments of stars from early stages to the most evolved ones and surroundings of active galactic nuclei can...
Phase Referencing in Optical Interferometry (2008)
Filho, Mercedes E., Garcia, Paulo, Duvert, Gilles, Duchene, Gaspard, Thiebaut, Eric, Young, John, ...
One of the aims of next generation optical interferometric instrumentation is to be able to make use of information contained in the visibility phase to construct high dynamic range images. Radio and...
Phase Closure Image Reconstruction for Future VLTI Instrumentation (2008)
Filho, Mercedes E., Renard, Stephanie, Garcia, Paulo, Duvert, Gilles, Duchene, Gaspard, Thiebaut, Eric, ...
Classically, optical and near-infrared interferometry have relied on closure phase techniques to produce images. Such techniques allow us to achieve modest dynamic ranges. In order to test the...
VSI: the VLTI spectro-imager (2008)
Malbet, F, Buscher, D, Weigelt, G, Garcia, P, Gai, M, Lorenzetti, D, ...
Optical and Infrared Interferometry.
Science case for 1 mas spectro-imagining in the near-infrared (2008)
Garcia, Paulo J V, Berger, Jean-Philippe, Marconi, Alessandro, Krivov, Alexander, Chiavassa, Andrea, Aringer, Bernard, ...
Optical and Infrared Interferometry.
Phase closure image reconstruction for future VLTI instrumentation (2008)
Filho, Mercedes E, Renard, Stephanie, Garcia, Paulo, Duvert, Gilles, Duchene, Gaspard, Thiebaut, Eric, ...
Optical and Infrared Interferometry.
Phase referencing in optical interferometry (2008)
Filho, Mercedes E, Garcia, Paulo, Duvert, Gilles, Duchene, Gaspard, Thiebaut, Eric, Young, John, ...
Optical and Infrared Interferometry.
HST observations of gravitationally lensed QSOs (2008)
The 41st ESLAB Symposium "The Impact of HST on European Astronomy" (June 2007)
Président: Pr. Jean-Pierre Swings (2008)
Olivier Absil, Directeur Pr, Jean Surdej, Examinateurs Dr, Vincent Coudé Foresto
planetary systems using infrared interferometric techniques THÈSE présentée pour l’obtention du diplôme de
Science case for 1 mas spectro-imagining in the near-infrared (2008)
Garcia, Paulo J. V., Berger, Jean-Philippe, Marconi, Alessandro, Krivov, Alexander, Chiavassa, Andrea, Aringer, Bernard, ...
We present the work developed within the science team of the Very Large Telescope Interferometer Spectro-Imager (VSI) during the Phase A studies. VSI aims at delivering ~ 1 milliarcsecond resolution...
Pacaud, F, Pierre, M, Adami, C, Altieri, B, Andreon, S, Chiappetti, L, ...
We present a sample of 29 galaxy clusters from the XMM-LSS survey over an area of some 5 deg(2) out to a redshift of z = 1.05. The sample clusters, which represent about half of the X-ray clusters...
The XMM-Large scale structure catalogue: X-ray sources and associated optical data. Version I (2007)
Pierre, M, Chiappetti, L, Pacaud, F, Gueguen, A, Libbrecht, C, Altieri, B, ...
Following the presentation of the XMM-Large Scale Structure (XMM-LSS) survey X-ray source detection package by Pacaud et al., we provide the source lists for the first surveyed 5.5 deg(2). The...
Garcet, Olivier, Gandhi, P, Gosset, Eric, Sprimont, Pierre-Guillaume, Surdej, Jean, Borkowski, Virginie, ...
Aims. Our goal is to characterize AGN populations by comparing their X-ray and optical classifications within the framework of the standard orientationbased unified scheme. Methods. We present a...
Aims. We propose a method based on the Principal Component Analysis (PCA) to classify and estimate the redshift of an extinction law in a distant gravitational lens galaxy. Such extinction laws are...
Sluse, D, Claeskens, J-F, Hutsemekers, Damien, Surdej, Jean
Aims.We discuss and characterize micro-lensing among the 3 brightest lensed images (A-B-C) of the gravitational lens system RXS J1131-1231 (a quadruply imaged AGN) by means of long slit optical and...
Sluse, D, Claeskens, JF, Hutsemekers, Damien, Surdej, Jean
Aims. We discuss and characterize micro-lensing among the 3 brightest lensed images (A-B-C) of the gravitational lens system RXS J1131-1231 (a quadruply imaged AGN) by means of long slit optical and...
Obscured and unobscured AGN populations in a hard-X-ray selected sample of the XMDS survey (2007)
Tajer, M, Polletta, M, Chiappetti, L, Maraschi, L, Trinchieri, G, Maccagni, D, ...
Aims. Our goal is to probe the populations of obscured and unobscured AGN investigating their optical-IR and X-ray properties as a function of X-ray flux, luminosity and redshift within a hard X-ray...
Mazure, A, Adami, C, Pierre, M, Le Fevre, O, Arnouts, S, Duc, PA, ...
Aims. We investigate structures in the D1 CFHTLS deep field to test the method that will be applied to generate homogeneous samples of clusters and groups of galaxies in order to constrain the...
Garcet, Olivier, Gandhi, P, Gosset, Eric, Sprimont, Pierre-Guillaume, Surdej, Jean, Borkowski, Virginie, ...
Aims.Our goal is to characterize AGN populations by comparing their X-ray and optical classifications within the framework of the standard orientation-based unified scheme. Methods: We present a...
Polletta, M, Tajer, M, Maraschi, L, Trinchieri, G, Lonsdale, C J, Chiappetti, L, ...
We present the SEDs of a hard X-ray selected sample containing 136 sources with F[SUB]2-10keV[/SUB]>10[SUP]-14[/SUP] erg cm[SUP]-2[/SUP] s[SUP]-1[/SUP] 132 are AGNs. The sources are detected in a 1...
The XMM Large-Scale Structure survey: the X-ray pipeline and survey selection function (2006)
Pacaud, F, Pierre, M, Refregier, A, Gueguen, A, Starck, JL, Valtchanov, I, ...
We present the X-ray pipeline developed for the purpose of the cluster search in the XMM Large-Scale Structure (XMM-LSS) survey. It is based on a two-stage procedure via a dedicated handling of the...
Pierre, M, Pacaud, F, Duc, PA, Willis, JP, Andreon, S, Valtchanov, I, ...
We present the XMM Large-Scale Structure Survey (XMM-LSS) cluster catalogue corresponding to the Canada-France-Hawaii Telescope Legacy Survey D1 area. The list contains 13 spectroscopically...
Riaud, Pierre, Mawet, D, Absil, Olivier, Boccaletti, A, Baudoz, P, Herwats, Emilie, ...
Context: .High angular resolution imaging of nearby pre-main sequence stars with ages between 1 and 30 Myr can give valuable information on planet formation mechanisms. This range of ages is thought...
Gandhi, P, Garcet, Olivier, Disseau, L, Pacaud, F, Pierre, M, Gueguen, A, ...
We analyze X-ray sources detected over 4.2 pseudo-contiguous sq. deg. in the 0.5-2 keV and 2-10 keV bands down to fluxes of 2 x 10(-15) and 8 x 10(-15) erg s(-1) cm(-2) respectively, as part of the...
Riaud, P, Mawet, D, Absil, Olivier, Boccaletti, A, Baudoz, P, Herwats, Emilie, ...
Context: High angular resolution imaging of nearby pre-main sequence stars with ages between 1 and 30 Myr can give valuable information on planet formation mechanisms. This range of ages is thought...
VSI: a milli-arcsec spectro-imager for the VLTI (2006)
Malbet, Fabien, Kern, Pierre, Berger, Jean-Philippe, Jocou, Laurent, Garcia, Paulo, Buscher, David, ...
VLTi Spectro-Imager (VSI) is a proposition for a second generation VLTI instrument which is aimed at providing the ESO community with the capability of performing image synthesis at milli-arcsecond...
The 4m international liquid mirror telescope (ILMT) (2006)
Surdej, Jean, Absil, Olivier, Bartczak, Przemyslaw, Borra, E, Chisogne, J-P, Claeskens, J-F, ...
The entire funding has recently been obtained in Belgium for the construction of a 4m Liquid Mirror Telescope. Its prime focus will be equipped with a semi-conventional glass corrector allowing to...
VSI: a milli-arcsec spectro-imager for the VLTI (2006)
Malbet, F, Kern, P Y, Berger, J-P, Jocou, L, Garcia, P, Buscher, D, ...
Advances in Stellar Interferometry - SPIE Conference 6268
Claeskens, JF, Sluse, D, Riaud, P, Surdej, Jean
Aims. High angular resolution images of the complex gravitational lens system RXS J1131-1231 (a quadruply imaged AGN with a bright Einstein ring) obtained with the Advanced Camera for Surveys and...
Claeskens, Jean-François, Smette, Alain, Vandenbulcke, Luc, Surdej, Jean
All-sky, multicolour, medium deep (V similar or equal to 20) surveys have the potentiality of detecting several hundred thousands of quasi-stellar objects (QSOs). Spectroscopic confirmation is not...
Sluse, D, Claeskens, J-F, Altieri, B, Cabanac, R A, Garcet, O, Hutsemekers, Damien, ...
Aims.RXS J113155.4-123155 (z=0.66) is a quadruply imaged lensed quasar with a resolved Einstein Ring. The goal of this paper is to provide a full characterization of this system, and more...
Gravitational lensing and anomalous redshifts (2006)
Surdej, Jean, Claeskens, J*-F, Sluse, D
In this chapter, we should like to address the following question: can we invoke gravitational lensing as a possible explanation for anomalous redshifts? In the rest of the chapter, anomalous...
Sluse, D, Claeskens, J*-F, Altieri, B, Cabanac, R A, Garcet, O, Hutsemekers, Damien, ...
Aims.RXS J113155.4-123155 (z=0.66) is a quadruply imaged lensed quasar with a resolved Einstein Ring. The goal of this paper is to provide a full characterization of this system, and more...
The Butcher-Oemler effect at z similar to 0.35: a change in perspective (2006)
Andreon, S, Quintana, H, Tajer, M, Galaz, G, Surdej, Jean
In this paper we focus on the much debated Butcher-Oemler effect: the increase with redshift of the fraction of blue galaxies in clusters. Considering a representative cluster sample made of seven...
VSI: a milli-arcsec spectro-imager for the VLTI (2006)
Malbet, Fabien, Kern, Pierre, Berger, Jean-Philippe, Jocou, Laurent, Garcia, Paulo, Buscher, David, ...
VLTi Spectro-Imager (VSI) is a proposition for a second generation VLTI instrument which is aimed at providing the ESO community with the capability of performing image synthesis at milli-arcsecond...
VSI: a milli-arcsec spectro-imager for the VLTI (2006)
Malbet, Fabien, Kern, Pierre, Berger, Jean-Philippe, Jocou, Laurent, Garcia, Paulo, Buscher, David, ...
VLTi Spectro-Imager (VSI) is a proposition for a second generation VLTI instrument which is aimed at providing the ESO community with the capability of performing image synthesis at milli-arcsecond...
VSI: a milli-arcsec spectro-imager for the VLTI (2006)
Malbet, Fabien, Kern, Pierre, Berger, Jean-Philippe, Jocou, Laurent, Garcia, Paulo, Buscher, David, ...
VLTi Spectro-Imager (VSI) is a proposition for a second generation VLTI instrument which is aimed at providing the ESO community with the capability of performing image synthesis at milli-arcsecond...
VSI: a milli-arcsec spectro-imager for the VLTI (2006)
Malbet, Fabien, Kern, Pierre, Berger, Jean-Philippe, Jocou, Laurent, Garcia, Paulo, Buscher, David, ...
VLTi Spectro-Imager (VSI) is a proposition for a second generation VLTI instrument which is aimed at providing the ESO community with the capability of performing image synthesis at milli-arcsecond...
Gandhi, P, Garcet, Olivier, Disseau, L, Pacaud, F, Pierre, M, Gueguen, A, ...
We analyze X-ray sources detected over 4.2 pseudo-contiguous sq. deg. in the 0.5-2 keV and 2-10 keV bands down to fluxes of 2× 10[SUP]-15[/SUP] and 8× 10[SUP]-15[/SUP] erg s[SUP]-1[/SUP]...
SEE-COAST: The Super-Earth Explorer (2006)
Schneiders, Jean-Pierre, Riaud, P, Tinetti, G, Schmid, H M, Stam, D, Udry, S, ...
Journees Francaises de l'Astrophysique 2006
Lensing properties of 7 damped Lyman-alpha absorbing galaxy-QSO pairs (2005)
Brun, Vincent Le, Smette, Alain, Surdej, Jean, Claeskens, Jean-Francois
Le Brun et al. (1997) presented the first identifications of the galaxies giving rise to 7 intermediate redshift damped Ly-alpha (DLA) absorption systems. Here, we study the gravitational lensing...
Willis, JP, Pacaud, F, Valtchanov, I, Pierre, M, Ponman, T, Read, A, ...
We present X-ray and optical spectroscopic observations of 12 galaxy groups and clusters identified within the X-ray Multi-Mirror (XMM) Large-Scale Structure (LSS) survey. Groups and clusters are...
Nakos, Th, Courbin, F, Poels, Joël, Libbrecht, C, Magain, Pierre, Surdej, Jean, ...
We present the results of two-band CCD photometric monitoring of the gravitationally lensed quasar Q 0142-100 (UM 673). The data, obtained at ESO-La Silla with the 1.54 m Danish telescope in the Gunn...
The XMM-LSS survey - The XMDS/VVDS 4 sigma catalogue (2005)
Chiappetti, L, Tajer, M, Trinchieri, G, Maccagni, D, Maraschi, L, Paioro, L, ...
We present a first catalogue of X-ray sources resulting from the central area of the XMM-LSS (Large Scale Structure survey). We describe the reduction procedures and the database tools we developed...
Moreau, O, Libbrecht, C, Lee, DW, Surdej, Jean
Using an optimal image subtraction technique, we have derived the V and R light curves of the four lensed QSO components of Q2237+0305 from the monitoring CCD frames obtained by the GLITP...
The XMM-LSS survey - First high redshift galaxy clusters: Relaxed and collapsing systems (2004)
Valtchanov, I, Pierre, M, Willis, J, Dos Santos, S, Jones, L, Andreon, S, ...
We present five newly found galaxy clusters at z > 0.6 from the XMM Large-Scale Structure Survey (XMM-LSS). All five objects are extended X-ray sources in the XMM images. For three of them we have...
The XMM-LSS survey : Survey design and first results* (2004)
Pierre, Marguerite, Valtchanov, Ivan, Altieri, Bruno, Andreon, Stefano, Bolzonella, Micol, Bremer, Malcolm, ...
A quadruply imaged quasar with an optical Einstein ring candidate: 1RXS J113155.4-123155 (2003)
Sluse, D, Surdej, Jean, Claeskens, J-F, Hutsemekers, Damien, Jean, C, Courbin, F, ...
We report the discovery of a new quadruply imaged quasar surrounded by an optical Einstein ring candidate. Spectra of the different components of 1RXS J113155.4-123155 reveal a source at z= 0.658. Up...
Close pairs of quasars with different redshifts: New observations and results (2003)
Sluse, D, Surdej, Jean, Claeskens, JF, De Rop, Yves, Lee, DW, Iovino, A, ...
Burbidge et al. (1997) argue that the observed number of quasar pairs with small angular separations and different redshifts (typically Deltatheta less than or equal to 5" and Deltaz > 0.1) is not...
HST STIS observations of four QSO pairs (2002)
Aracil, B, Petitjean, P, Smette, A, Surdej, Jean, Mucket, JP, Cristiani, S
We present HST STIS observations of four quasar pairs with redshifts 0.84
Alcalde, D, Mediavilla, E, Moreau, O, Munoz, JA, Libbrecht, C, Goicoechea, LJ, ...
We present VR observations of QSO 2237+ 0305 conducted by the Gravitational Lensing International Time Project collaboration from 1999 October 1 to 2000 February 3. The observations were made with...
Vangeyte, B, Manfroid, Jean, Surdej, Jean
The image deformations induced by the time-delay integration (TDI) mode, used with a CCD camera at the prime focus of a Liquid Mirror Telescope (LMT), can be corrected for by a system of lenses,...
Optimal extraction of multiple overlapping spectra using a maximum entropy algorithm (2002)
A general algorithm of slit spectra extraction for a system of point-like sources (e.g. multiple lensed images of a quasar) has been developed, assuming that the point-spread function (PSF) induced...
Gravitational lensing in quasar samples (2002)
The first cosmic mirage was discovered approximately 20 years ago as the double optical counterpart of a radio source. This phenomenon had been predicted some 70 years earlier as a consequence of...
Jean, C, Claeskens, J *-F, Surdej, Jean
Gravitational lensing: recent progress and future goals
Weighing nearby stars with GAIA ? (2001)
Dib, S, Surdej, Jean, Claeskens, J-F
Conference "European meeting, Census of the Galaxy: Challenges for photometry and spectrometry with GAIA"
HST and ground-based observations of the gravitational lens system Q1009-0252 A & B (2001)
Claeskens, J-F, Khmil, S V, Lee, Dong Wook, Sluse, D, Surdej, Jean
In this paper, we propose a critical study of direct images and spectra obtained for the doubly imaged QSO Q1009-0252 A & B (=LBQS1009-0252 A & B). First, we report new observations with the WFPC2...
Quasar pairs with arcminute angular separations (2001)
We use the Véron-Cetty & Véron (\cite {veron}) catalog (VV) of 13 213 quasars to investigate their possible physical grouping over angular scales 10arcsec
The 4-m International Liquid Mirror Telescope Project (ILMT) (poster) (2001)
Poels, Joël, Borra, E, Claeskens, J F, Jean, C, Manfroid, Jean, Montfort, Francis, ...
Astronomical Data Analysis Software & Systems X Conference
Determination of the mass of nearby stars from astrometric microlensing observations (2001)
Dib, S, Claeskens, J-F, Surdej, Jean
Proceedings of the 36th Liège International Astrophysical Colloquium: “From optical to millimetric interferometry, scientific and technological challenges”
The GL bibliography and an interactive database (Poster contribution) (2001)
Pospieszalska-Surdej, A, Surdej, Jean, Detal, Alain, Jean, C
Gravitational lensing: recent progress and future goals
Surdej, Jean, Swings, Jean-Pierre, Caro, Denise, Detal, Alain
Call number: QB461 .C65 2001
Microlensing observations with the 4-m International Liquid Mirror Telescope (2001)
Claeskens, J C, Jean, C, Surdej, Jean
Conference “Microlensing 2000: A New Era of Microlensing Astrophysics”
Surveys with the 4-m International Liquid Mirror Telescope Project (ILMT) (poster) (2001)
Poels, Joël, Moreau, O, Manfroid, Jean, Surdej, Jean, Borra, H, Claeskens, J F, ...
MPA/ESO/MPE Joint Astronomy Conference “Mining the Sky”
Extent of Lyman-alpha complexes from HST observations of four pairs of quasars (2001)
Aracil, B, Petitjean, P, Smette, A, Surdej, Jean, Mücket, J
The 17th IAP Colloquium "Gaseous matter in galaxies and intergalactic space. Observational and theoretical results, with special emphasis on new data from FUSE, HST and VLT'
QSO colors in the proposed GAIA photometric systems (2001)
GAIA Workshop in Copenhagen
Lensing properties of 7 damped Lyman-alpha absorbing galaxy-QSO pairs (2000)
Brun, Vincent Le, Smette, Alain, Surdej, Jean, Claeskens, Jean-Francois
Le Brun et al. (1997) presented the first identifications of the galaxies giving rise to 7 intermediate redshift damped Ly-alpha (DLA) absorption systems. Here, we study the gravitational lensing...
Lensing properties of 7 damped Lyman-alpha absorbing galaxy-QSO pairs (2000)
Brun, Vincent Le, Smette, Alain, Surdej, Jean, Claeskens, Jean-Francois
Le Brun et al. (1997) presented the first identifications of the galaxies giving rise to 7 intermediate redshift damped Ly-alpha (DLA) absorption systems. Here, we study the gravitational lensing...
Lensing properties of 7 damped Lyman-alpha absorbing galaxy-QSO pairs (2000)
Brun, Vincent Le, Smette, Alain, Surdej, Jean, Claeskens, Jean-Francois
Le Brun et al. (1997) presented the first identifications of the galaxies giving rise to 7 intermediate redshift damped Ly-alpha (DLA) absorption systems. Here, we study the gravitational lensing...
Claeskens, J-F, Lee, D-W, Remy, M, Sluse, D, Surdej, Jean
New constraints on the mass of quasars are derived from gravitational lensing studies of the QSO pairs Q1548+114 A & B and Q1148+0055 A & B, for which new ground-based and Hubble Space Telescope...
Lensing properties of 7 damped Lyalpha absorbing galaxy-QSO pairs (2000)
Le Brun, V, Smette, A, Surdej, Jean, Claeskens, J-F
Le Brun et al. (1997) presented the first identifications of the galaxies giving rise to 7 intermediate redshift damped Lyalpha (DLA) absorption systems. Here, we study the gravitational lensing...
Surveys with a 4 m Liquid Mirror Telescope (1999)
Jean, C, Claeskens, J*-F, Surdej, Jean
Looking Deep in the Southern Sky, Proceedings of the ESO/Australia Workshop
Gravitational Lensing by Damped LY alpha Absorbers (1999)
Smette, A, Claeskens, J-F, Surdej, Jean
Highly Redshifted Radio Lines, ASP Conf. Series Vol. 156
HST Observations of the QSO pair Q1026-0045A,B (1998)
Petitjean, Patrick, Surdej, Jean, Smette, Alain, Shaver, Peter, Muecket, Jan, Remy, Marc
The spatial distribution of the Ly$\alpha$ forest is studied using new HST data for the quasar pair Q~1026--0045 A and B at $z_{em}$ = 1.438 and 1.520 respectively. The angular separation is 36...
Detection of the lensing galaxy for the double QSO HE 1104-1805 (1998)
Remy, M., Surdej, Jean, Hjorth, J., Refsdal, S., Wucknitz, O., ...
High angular resolution ground-based direct imaging (V, R, I_c) of the double QSO HE 1104-1805 has been obtained with the NOT and NTT telescopes. Analysis of these data led to the first detection of...
Light rays from a multiply imaged quasar usually sample different path lengths across the deflector. Extinction in the lensing galaxy may thus lead to a differential obscuration and reddening between...
Close projected QSO-Galaxy associations: are they real? (1998)
The present status of close projected associations between high redshift quasars and foreground galaxies is reviewed in the framework of gravitational lensing, adopting both an observational and a...
Determination of the redshift of an invisible lens (1998)
Oslo workshop 'Gravitational lensing', 10-12 June 1998, 1998
Spatial distribution of the Ly-alpha forest (1998)
Petitjean, P, Surdej, Jean, Remy, M, Smette, A, Mucket, J, Shaver, P
The Young Universe: Galaxy Formation and Evolution at Intermediate and High Redshift ASP Conference Series; Vol. 146
Gravitational lens studies with a LMT (1998)
International workshop “Science with Liquid Mirror Telescopes”
ESO & NOT photometric monitoring of the Cloverleaf quasar (1997)
Ostensen, R, Remy, M, Lindblad, P O, Refsdal, S, Stabell, R, Surdej, Jean, ...
The Cloverleaf quasar, H1413+117, has been photometrically monitored at ESO (La Silla, Chile) and with the NOT (La Palma, Spain) during the period 1987--1994. All good quality CCD frames have been...
Wiggs, M, Baggett, S, Surdej, Jean, Tullos, C
The 1997 HST Calibration Workshop with a new generation of instruments
WFPC2 Photometry from Subtraction of Observed PSFs (1997)
Surdej, Jean, Baggett, S, Remy, M, Wiggs, M
1997
WFPC2 photometry from subtraction of TinyTim PSFs (1997)
Remy, M, Surdej, Jean, Baggett, S, Wiggs, M
Based upon the subtraction of TinyTim Point Spread Function (PSFs) from Principle Component Image (PC1) point-like objects, a method has been developed to determine the optimal values for the...
HST confirmation of the lensed quasar J03.13. (1997)
Surdej, Jean, Remy, M., Refsdal, S., Pirenne, B., Prieto, A., ...
In order to definitely prove the claim by Claeskens et al. (1996A&A...305L...9C) that J03.13 is a doubly imaged quasar, WFPC2 direct imaging and FOS spectroscopy of this compact system have been...
Surveys of ultraviolet-excess quasar candidates in large fields (1997)
Gosset, Eric, Moreau, O, Surdej, Jean, Swings, J-P, Arp, H C
We describe the results of a survey for moderately bright quasars performed in a 20.6-square-degree field around the galaxy NGC 450. The quasar candidates were selected on the basis of their...
Damped LYalpha Absorbers and Gravitational Lensing (1997)
Smette, Alain, Claeskens, Jean*-François, Surdej, Jean
Structure and Evolution of the Intergalactic Medium from QSO Absorption Line System
J03.13 A and B: a new multiply imaged QSO candidate. (1996)
Claeskens, J-F, Surdej, Jean, Remy, M
Careful analysis of direct R CCD frames obtained for selected Highly Luminous Quasars in March 1993 with the MPI/ESO 2.2m telescope has revealed that the quasar J03.13 consists of at least two...
Formation of Giant Luminous Arcs and Arclets Using an Optical Gravitational Lens Experiment (1996)
Surdej, Jean, Refsdal, S, Pospieszalska-Surdej, A
Astrophysical applications of gravitational lensing: International Astronomical Union. Symposium no. 173
Gravitational Lenses and Damped Ly-alpha Systems (1996)
Smette, A, Claeskens, J-F, Surdej, Jean
Astrophysical applications of gravitational lensing: the 173rd Symposium of the International Astronomical Union
J03.13 AB: A New Multiply Imaged QSO Candidate (1996)
Claeskens, J F, Surdej, Jean, Remy, M
Astrophysical applications of gravitational lensing: the 173rd Symposium of the International Astronomical Union
Gravitational Lenses Among Highly Luminous Quasars: Large Optical Surveys (1996)
Claeskens, J F, Jaunsen, A O, Surdej, Jean
Astrophysical applications of gravitational lensing: the 173rd Symposium of the International Astronomical Union
The 'Gravitational Lensing' Bibliography (1996)
Pospieszalska-Surdej, A, Surdej, Jean, Veron, P
Astrophysical applications of gravitational lensing: International Astronomical Union. Symposium no. 173
Ground-based and HST Direct Imaging of HLQs (1996)
Surdej, Jean, Jaunsen, A O, Claeskens, J*-F, Gonzaga, S, Pospieszalska-Surdej, A, Pirenne, B, ...
IAU Symposium 173, “Gravitational Lensing”
The Clover Leaf Quasar H1413+117: New Photometric Light Curves (1996)
Remy, M, Gosset, Eric, Hutsemekers, Damien, Revenaz, B, Surdej, Jean
Astrophysical applications of gravitational lensing: the 173rd Symposium of the International Astronomical Union
Science with the Hubble Space Telescope - II. Proceedings of a workshop held in Paris
Willis, J P, Pacaud, F, Valtchanov, I, Pierre, M, Ponman, T, Read, A, ...
Not Available
Integral Field Spectroscopy of Selected Extragalactic Objects with FUEGOS (1995)
Surdej, Jean, Vanderriest, C, Angonin-Willaime, M-C, Claeskens, J-F, Felenbok, P
1995, in the proceedings of the ESO workshop on ’Science with the VLT’
Detal, Alain, Hainaut, O, Pospieszalska-Surdej, A, Schils, P, Schober, H J, Surdej, Jean
Asteroids 624 Hektor and 43 Ariadne have been observed photometrically at the European Southern Observatory (La Silla, Chile) in order to determine their pole orientation. The lightcurves (1984 and...
According to Einstein's general theory of relativity, a gravitational field bends electromagnetic waves in much the same way as low atmospheric air layers curve the trajectory of a propagating light...
Gravitational Lensing as a Tool: Future Observational Prospects (1994)
Frontiers of Space and Ground-Based Astronomy: The Astrophysics of the 21st century
Lists of accepted and proposed gravitational lens systems (1993)
Gravitational Lenses in the Universe, Proceedings of the 31st Liege International Astrophysical Colloquium (LIAC 93)
Gravitational lensing statistics based on a large sample of highly luminous quasars (1993)
Surdej, Jean, Claeskens, J F, Crampton, D, Filippenko, A V, Hutsemekers, Damien, Magain, Pierre, ...
Results on gravitational lensing statistics applied to a sample of 469 highly luminous quasars are reported. The objects were directly imaged, either from the ground under optimal seeing conditions,...
Erratum - Q:1208+1011 - the Most Distant Multiply Imaged Quasar or a Binary (1993)
Magain, Pierre, Surdej, Jean, Vanderriest, C, Pirenne, B, Hutsemekers, Damien
In the title of this Letter, the word "multiply" was accidentally omitted. The correct title is shown above.
Surdej, Jean, Remy, M, Smette, A, Claeskens, J-F, Magain, Pierre, Refsdal, S, ...
Gravitational Lenses in the Universe
The optical gravitational lens experiment (1993)
Surdej, Jean, Refsdal, S, Pospieszalska-Surdej, A
Gravitational Lenses in the Universe, 31st Liege International Astrophysical Colloquium (LIAC 93)
Optical imaging of the gravitational lens system B 1422+231 (1993)
Surdej, Jean, Smette, A, Claeskens, J-F
Direct optical images (Bessel V, R and Gunn i; average seeing of 0.88 seconds) of B1422+231, obtained in March 1993 at European Southern Observatory (ESO) (La Silla), have been decomposed by fitting...
Optical imaging of gravitational lenses B1422+231 (1993)
Remy, M, Surdej, Jean, Smette, A, Claeskens, J F
Gravitational Lenses in the Universe, Proceedings of the 31st Liege International Astrophysical Colloquium (LIAC 93)
Surdej, Jean, Remy, M, Smette, A, Magain, Pierre, Refsdal, S, ...
31st Liège International Astrophysical Colloquium "Gravitational lenses in the Universe"
Systematic search for gravitational mirages among general quasar samples (1993)
Moreau, O, Gosset, Eric, Reboul, H, Surdej, Jean
31st Liège International Astrophysical Colloquium "Gravitational lenses in the Universe"
List of accepted and proposed gravitational lens systems (1993)
31st Liège International Astrophysical Colloquium "Gravitational lenses in the Universe"
Invited talk "Observing gravitational lenses" (1993)
2nd Oslo mini-workshop on "Gravitational lenses", Oslo (Norway)
Hutsemekers, Damien, Surdej, Jean, Van Drom, E
Gravitational Lenses in the Universe, Proceedings of the 31st Liege International Astrophysical Colloquium (LIAC 93)
Gravitational lensing as a tool: future observational prospects (1993)
Invited talk: Second general meeting of the European Astronomical Society "Extragalactic astronomy and observational cosmology"
Galaxies statistics around highly luminous quasars: the ESO Sample (1993)
Van Drom, E, Surdej, Jean, Magain, Pierre, Hutsemekers, Damien, Gosset, Eric, Claeskens, J F, ...
31st Liège International Astrophysical Colloquium "Gravitational lenses in the Universe"
The cloverleaf quasar H1413+117: a preliminary light curve (1993)
Arnould, P, Remy, M, Gosset, Eric, Hainaut, O, Hutsemekers, Damien, Magain, Pierre, ...
31st Liège International Astrophysical Colloquium "Gravitational lenses in the Universe"
Claeskens, J F, Crampton, D, Filippenko, A V, Hutsemekers, Damien, Magain, Pierre, Pirenne, B, ...
31st Liège International Astrophysical Colloquium "Gravitational lenses in the Universe"
The relative photometric lightcurve of UM673 A&B (1993)
Daulie, G, Hainaut, O, Hutsemekers, Damien, Magain, Pierre, Remy, M, Smette, A, ...
31st Liège International Astrophysical Colloquium "Gravitational lenses in the Universe"
ESO key programme, gravitational lensing: quasars and radio galaxies; a status report (1992)
Surdej, Jean, Angonin, M C, Arnaud, J, Bauer, T, Borgeest, U, Hainaut, O, ...
Distribution of Matter in the Universe, 2nd DAEC mtg
A spectroscopic study of UM 673 A and B - On the size of Lyman-alpha clouds (1992)
Smette, A, Surdej, Jean, Shaver, P A, Foltz, C B, Chaffee, F H, Weymann, R J, ...
The Ly-alpha forest spectra obtained for the A and B images of the gravitationally lensed high-redshift quasar UM 673 are investigated, and higher resolution data of the brightest (A) image are...
The new gravitational lens candidate Q 1208+1011 and the importance of high quality data. (1992)
Magain, Pierre, Surdej, Jean, Vanderriest, C, Pirenne, B, Hutsemekers, Damien
Not Available
Q 1208 + 1011 - The most distant imaged quasar, or a binary? (1992)
Magain, Pierre, Surdej, Jean, Vanderriest, C, Pirenne, B, Hutsemekers, Damien
The paper reports the discovery of a new gravitational lens candidate: the high redshift (z = 3.803) and highly luminous (V = 17.5, M[SUB]V[/SUB] = -30.3) quasar Q 1208 + 1011. As derived from the...
Surdej, Jean, Remy, M, Haubold, H
Science with the Hubble Space Telescope
Optical observations of gravitational lenses (1992)
Surdej, Jean, Claeskens, J F, Hutsemekers, Damien, Magain, Pierre, Pirenne, B
Hamburg conference on ’Gravitational Lenses’, Lecture Notes in Physics 406
A Search for Gravitational Lenses Using Sky Survey Plate Scans (1992)
Meylan, G, Djorgovski, S, Surdej, Jean, Pirenne, B, Weir, W N, Beaulieu, S
Hamburg conference on ’Gravitational Lenses’
Detal, Alain, Collette, P, Hainaut, O, Ibrahim-Denis, A, Pospieszalska-Surdej, A, Schils, P, ...
"Observations and physical properties of small solar system bodies", 30th Liège International Astrophysical Colloquium, Institut d’Astrophysique, Liège
FAS: A new method for deriving the pole orientation and shape parameters of asteroids (1992)
Detal, Alain, Schils, P, Collette, P, Hainaut, O, Surdej, Jean
30th Liège International Astrophysical Colloquium
Deformation of P Cygni line profiles by gravitational microlensing effects (1992)
Hutsemekers, Damien, Surdej, Jean, Vandrom, E
Gravitational Lenses
Surdej, Jean, Claeskens, J F, Crampton, D, Filippenko, A V, Hutsemekers, Damien, Magain, Pierre, ...
"Science with the Hubble Space Telescope", ESO Conference
MG1131 + 0456 - Discovery of the optical Einstein ring with the NTT (1991)
Hammer, F, Angonin, M C, Le Fevre, O, Meylan, G, Smette, A, Surdej, Jean
Deep optical imaging and spectroscopy have been obtained for the well known radio Einstein ring MG1131 + 0456 with the ESO/NTT. The direct CCD frames show a red emission excess at the exact location...
Nemry, F, Surdej, Jean, Hernaiz, A
It is reported that the main pollution in the spectral ranges 1270-1500 and 1500-1860 A is caused by photospheric absorption lines of FeV and FeIV, respectively. Making use of the first order moment...
A Spectroscopic Study of UM673 A &B: on the size of Lyman- alpha Clouds (1991)
Smette, A, Surdej, Jean, Shaver, P A, Foltz, C B, Chaffee, F H, Weymann, R J, ...
Quasar Absorption Lines, Proceedings of the ESO Mini-Workshop held
The Liege GRISM search for quasars (1991)
Gosset, Eric, Surdej, Jean, Cheng, F H, Swings, Jean-Pierre
"The Space Distribution of Quasars", ASP Conference Series, Vol. 21
First invited discourse during the XXIst General Assembly of the International Astronomical Union, IAU ’Highlights of Astronomy’ Vol. 9
Miscellaneous spectroscopic observations of quasars and quasar candidates (1990)
Veron, P, Veron-Cetty, M-P, Djorgovski, S, Magain, Pierre, Meylan, G, Surdej, Jean
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...
New observations and gravitational lens models of the Cloverleaf quasar H1413 + 117 (1990)
Kayser, R, Surdej, Jean, Condon, J J, Kellermann, K I, Magain, Pierre, Remy, M, ...
New optical and radio observations of the quadruple quasar H1413 + 117, the Cloverleaf, are presented. VLA data show radio counterparts at the positions of the four optical images and an additional...
Formation of P Cygni line profiles in relativistically expanding atmospheres (1990)
Hutsemekers, Damien, Surdej, Jean
The probabilistic approach of Surdej (1979) is followed to generalize the Sobolev (1958) formalism to the case of special relativity, in order to interpret accurately the P Cygni line profiles...
The nth order moment W(n)D of a resonance doublet P Cygni line profile (1990)
Surdej, Jean, Hutsemekers, Damien
The theory of the nth order moment W(n)D of a P Cygni line profile due to a resonance doublet line transition is developed here in the framework of the Sobolev approximation. It is shown that, in the...
First spectroscopic evidence of microlensing on a BAL quasar? The case of H 1413 + 117 (1990)
Angonin, M-C, Vanderriest, C, Remy, M, Surdej, Jean
New data has been obtained for the quadruply lensed quasar H 1413 + 117 using the bidimensional spectrograph SILFID at the CFH telescope. The spectra recorded for each of the four individual images...
Further observations of the light echoes from SN 1987 A (1990)
Detal, Alain, Surdej, Jean, Hutsemekers, Damien, Remy, M, Van Drom, E
Further direct observations of the light echoes from SN 1987 A were obtained on November 12 1988 with the 3.6-m telescope and EFOSC at ESO. In agreement with predictions made from earlier...
Bidimensional spectrography of the "clover leaf'' H1413+117 at sub-arcsec. Spatial resolution (1990)
Angonin, M C, Vanderriest, C, Surdej, Jean
"Gravitational lensing"
Swings, Jean-Pierre, Magain, Pierre, Remy, M, Surdej, Jean, Smette, A, Hutsemekers, Damien, ...
"Gravitational lensing"
Preliminary analysis of high-resolution spectra for UM 673 A & B (1990)
Smette, A, Surdej, Jean, Shaver, P A, Foltz, C B, Magain, Pierre
"Gravitational lensing"
A search for gravitational lensing among highly luminous quasars - New results (1990)
Magain, Pierre, Remy, M, Surdej, Jean, Swings, J-P, Smette, A
"Gravitational lensing"
Determination of the Spin Vector of a Synthetic Asteroid (1990)
Karttunen, H, Cellino, A, Detal, Alain, Drummond, J, Hainaut, O, Surdej, Jean, ...
Asteroids, comets, meteors III, Meeting (AMC 89) held at the Astronomical Observatory of the Uppsala University
Determination of pole orientations and shapes of asteroids. (1990)
Magnusson, P, Barucci, M A, Drummond, J D, Lumme, K, Ostro, S J, Surdej, Jean, ...
The principles of asteroid lightcurve inversion and the information available from photometry are reviewed. General tools as well as specific techniques for shape and pole determinations are...
Revisited mass-loss rates for a sample of central stars of planetary nebulae (1989)
Hutsemekers, Damien, Surdej, Jean
Using improved relations for the first order moment of a P Cygni line profile, mass-loss rates have been rederived for a sample of seventeen central stars of planetary nebulae observed with IUE in...
Profiles of a Key Programme: Gravitational Lensing (1989)
Surdej, Jean, Arnaud, J, Borgeest, U, Djorgovski, S, Fleischmann, F, Hammer, F, ...
Prior to Professor van der Laan's enquiry, in the March 1988 issue of the Messenger, on the general interest among astronomers from the European community to possibly participate in Key Programmes...
Revisited Mass-Loss Rates of Planetary Nebula Nuclei Observed with IUE (1989)
Hutsemekers, Damien, Surdej, Jean
Planetary Nebulae. Proceedings of the 131st. Symposium of the International Astronomical Union
Observations of the new gravitational lens system UM 673 = Q 0142-100 (1988)
Surdej, Jean, Magain, Pierre, Swings, J-P, Borgeest, U, Courvoisier, T J-L, Kayer, R, ...
The authors have recently initiated a high resolution direct imaging survey of a selected sample of highly luminous quasars (HLQs). The observations are carried out with the 2.2 m telescope at ESO,...
Surveys of Ultraviolet Excess Quasar Candidates in Three Large Fields (1988)
Swings, Jean-Pierre, Surdej, Jean, Gosset, Eric
Workshop on Optical Surveys for Quasars
Search for Gravitational Lensing from a Survey of Highly Luminous Quasars (1988)
Surdej, Jean, Swings, J-P, Magain, Pierre, Borgeest, U, Kayser, R, Refsdal, S, ...
Optical Surveys for Quasars, ASP Conference Series
Surdej, Jean, Magain, Pierre, Swings, Jean-Pierre, Remy, M, Borgeest, U, Kayser, R, ...
First D.A.E.C. workshop on "Large Scale Structures"
Surdej, Jean, Hutsemekers, Damien
The possibility that the observed broad absorption line (BAL) profiles are formed in spherically symmetric atmospheres is investigated, and it is found that BAL and non-BAL QSOs form two distinct...
Hutsemekers, Damien, Surdej, Jean
The authors present the results of numerical calculations for the first order moment W[SUB]1[/SUB] of subordinate P Cygni line profiles as a function of the parameter...
Is There an Alignment of Quasars Near NGC 520? (1987)
Gosset, Eric, Surdej, Jean, Swings, Jean-Pierre
Observational Cosmology
Spectroscopy of the QSSOs Q0118-031 A, B, C (1986)
Robertson, J G, Shaver, P A, Surdej, Jean, Swings, Jean-Pierre
Optical spectroscopy of the three quasars Q0118-031A, B, C is presented. These objects which have emission redshifts of 12.445, 2.112 and 1.165 respectively, form a triplet on the plane of the sky...
OPTOPUS observations of Halley’s comet (1986)
The multiobject spectrograph OPTOPUS, for use at the 3.6-m ESO telescope with the CCD detector, is described, and preliminary results of spectra obtained in December 1985 of selected regions in the...
Surdej, Jean, Pospieszalska-Surdej, A, Michalowski, T, Schober, H J
Abstract image available at: http://esoads.eso.org/abs/1986A&A...170..167S
Further investigation of the pair of quasars Q0107 - 025 A and B (1986)
Surdej, Jean, Arp, H, Gosset, Eric, Kruszewski, A, Robertson, J G, Shaver, P A, ...
Low and intermediate dispersion spectroscopy of Q0107 - 025 A and B obtained at ESO, AAT, and MMT provide evidence for spectral differences between these two quasars. A redshift difference of 0.004...
Gosset, Eric, Surdej, Jean, Swings, Jean-Pierre
Quasars; Proceedings of the IAU Symposium, Bangalore, India, Dec. 2-6, 1985. Edited by Govind Swarup and V. K. Kapahi. Symposium sponsored by IAU, Tata Institute of Fundamental Research, Department...
The structure and spectral characteristics of the low-excitation planetary nebula HD 316248 (1985)
Hutsemekers, Damien, Surdej, Jean
Analysis of two medium dispersion (39 Å/mm) optical spectra of the compact planetary nebula HD 316248 is reported here. When compared with observations collected in 1968 - 70, the authors' data...
Radial velocities along the light curve of the peculiar emission-line star GG Carinae (1985)
Gosset, Eric, Hutsemekers, Damien, Swings, Jean-Pierre, Surdej, Jean
Measurements of the radial velocities of several emission and absorption lines in a large series of high dispersion spectra of the peculiar emission-line object GG Carinae are combined with the...
Swings, Jean-Pierre, Surdej, Jean, Henry, A, Gosset, Eric, Arp, H C
Abstract image available at: http://esoads.eso.org/abs/1985RMxAA..10...91S
Analysis of P Cygni line profiles - Generalization of the nth order moment WN (1985)
The generalization of the nth order moment W[SUB]n[/SUB] of a P Cygni line profile leads to a new approach of deriving the various physical quantities which characterize the phenomenon of mass-loss...
Pospieszalska-Surdej, A, Surdej, Jean
Near the opposition of a minor planet the geometrical approximation essentially constitutes a good representation of the Hapke-Irvine relation for describing the scattering properties of a surface...
CPD - 59 deg 2857 - A new red variable star (1985)
Gosset, Eric, Hutsemekers, Damien, Surdej, Jean
Two (C3 and C4) of the four comparison stars monitored during the photometric study of the peculiar emission-line star GG Car (Gosset et al., 1984) have been found to be variable. Available...
Two quasars seen near the spiral galaxy NGC 470 (1984)
Arp, H, Surdej, Jean, Swings, Jean-Pierre
The discovery of two quasars with 16arcsec separation from each other on the sky and within 95arcsec of the nucleus of the spiral galaxy NGC 470 is reported. The quasars were discovered in a search...
The structure and physical conditions characterizing the emission-line galaxy He 2-10 (1984)
Hutsemekers, Damien, Surdej, Jean
Direct plates taken through interference (Halpha+[N II] and [O III]) and broad band (B, R) filters at the prime focus of the ESO 3.6 m telescope reveal the structure of the emission-line galaxy He...
Photoelectric photometry of the peculiar emission-line star GG Carinae (1984)
Gosset, Eric, Surdej, Jean, Swings, J-P
The first extensive sets of photoelectric observations of the peculiar emission-line star GG Carinae were obtained from 1977 to 1981, in both the standard UBV and Strömgren systems. A Fourier...
Photoelectric lightcurves and rotation period of the minor planet 201 Penelope (1983)
Surdej, Jean, Louis, B, Cramer, N, Rufener, F, Waelkens, C, Barbier, R, ...
Results of photoelectric observations of the asteroid 201 Penelope carried out at the European Southern Observatory and Perth Observatory during the 1980 opposition of the asteroid between October 6...
UBV photometry of the minor planets 86 Semele, 521 Brixia, 53 Kalypso and 113 Amalthea (1983)
Surdej, Jean, Surdej, A, Louis, B
The asteroids were observed photometrically during the 1980 and 1981 oppositions, respectively. The V lightcurve of 86 Semele displays two asymmetric maxima and minima with a total amplitude DeltaV =...
For the case of optically thin lines, we show that the relation existing between the first order moment W1 ~ j (E(2)/E~ - 1)(2 - 212) d2 of a P Cygni profile and the quantity ii~in(1eve1), where M is...
Using realistic expressions for the velocity and opacity distributions in rapidly expanding atmospheres, the author presents numerical results for the first order moment W[SUB]1[/SUB] of a P Cygni...
Surdej, Jean, Swings, Jean-Pierre
Different equivalent widths and line displacements of Hbeta and Fe II are observed in spectra of two condensations located within the reflection nebula surrounding HD 87643: they indicate important...
IAUS 103 Planetary Nebulae
A new very interesting pair of quasars - Q0107 - 025 A and B (1983)
Surdej, Jean, Swings, Jean-Pierre, Henry, A, Arp, H, Kruszewski, A, Pedersen, H
Quasars and gravitational lenses
24th Liege International Astrophysical Colloquia "Quasars and gravitational lenses"
The far-UV spectrum of the low-excitation planetary nebula HD 138403 (1982)
Two high-resolution far-UV spectra of the low-excitation planetary nebula HD 138403 are analyzed which were obtained with the IUE satellite over the wavelength range from 1170 to 2070 A. It is shown...
The relationship between the first order moment and the mass loss rate is investigated within the framework of the Sobolev approximation (1947, 1957, 1958) under various physical and geometrical...
Surdej, A, Surdej, Jean, Swings, Jean-Pierre
Spectral variations detected within the last three decades for He II 4686 A, forbidden lines O III and other high excitation lines in the low-excitation planetary nebula HD 138403, are shown to...
The six-day rotation period of 1689 Floris-Jan - A new record among slowly rotating asteroids (1982)
Schober, H J, Surdej, Jean, Harris, A W, Young, J W
Abstract image available at: http://esoads.eso.org/abs/1982A&A...115..257S
Surdej, Jean, Swings, Jean-Pierre, Arp, H C, Barbier, R
A large field (approximately 25 sq deg) around NGC 5334 was searched for QSO candidates with ultraviolet-excess, in order to investigate the space density, distribution, and luminosity of quasars...
Quasars in a control field far from bright galaxies (1982)
The density of quasars in a control field of the sky selected to be free of bright galaxies is investigated in order to derive a value for the average background density of quasars and to analyze...
Asteroid rotation - Hunting for a record: 1689 Floris-Jan (1982)
Last year, in June 1981 - ESO Messenger No. 24, p. 22-23 - H. J. Schober published areport on "Spinning Asteroids and Photometry". There he mainly gave a general introduction about what can be done...
Further spectroscopic observations of 25 quasi-stellar objects (1981)
Surdej, Jean, Swings, Jean-Pierre
Spectroscopic observations are reported for 25 quasars suspected of having line profiles which are indicative of mass outflow from the central quasar. The quasars were selected on the basis of...
Formation of P Cygni profiles with limb darkening of the stellar core (1981)
In the framework of the Sobolev approximation, the effects of limb darkening of the stellar core on the formation of line profiles in rapidly expanding envelopes are investigated. For the case of...
Decelerated flows of matter around the quasars PHL 5200 and RS 23 (1981)
Surdej, Jean, Swings, Jean-Pierre
Line profile calculations are performed within the framework of the Sobolev approximation in order to simulate the P Cygni-like profiles observed for the resonance doublets of C IV and Si IV in the...
The Reflection Nebula Surrounding HD87643 (1981)
Surdej, A, Surdej, Jean, Swings, Jean-Pierre, Wamsteker, W
Direct plates in narrow bands (H , [0 NI], [S Ii]) and in the broad (B)-band show that the nebula surrounding the nova- like object HD 87643 is of reflective origin. Furthermore, a spectrogram of the...
West, R M, Surdej, Jean, Schuster, H-E, Muller, A B, Laustsen, S, Borchkhadze, T M
Abstract image available at: http://esoads.eso.org/abs/1981A&AS...46...57W
IAUC 3527 available at Central Bureau for Astronomical Telegrams.
Rotation period and photoelectric lightcurves of asteroids 68 Leto and 563 Suleika (1980)
Abstract image available at: http://esoads.eso.org/abs/1980A&AS...41..335S
Correlations between line-profile and photometric variations in the B 2 IV /e/ star HD 45677 (1980)
Swings, Jean-Pierre, Klutz, M, Surdej, A, Barbier, R, Surdej, Jean
Abstract image available at: http://esoads.eso.org/abs/1980A&A....90..116S
On the structure of the nebula M 2-9 (1980)
The structure of planetary nebula M 2-9 has been investigated on direct plates taken with the ESO 3.6 m-telescope in 1977-78. Compared with the photographs from 1952, 1971, and 1973 the main...
Formation of resonance doublet profiles in rapidly expanding envelopes (1980)
Sobolev's escape probability method is used to investigate the transfer of spectral line radiation for a resonance doublet in a rapidly expanding envelope. A three-level atom model is used to derive...
Abstract image available at: http://esoads.eso.org/abs/1979A&AS...38..269S
Photoelectric observations of two unusual asteroids - 1978 CA and 1978 DA (1979)
Schuster, H E, Surdej, A, Surdej, Jean
The two fast-moving asteroids 1978 CA and 1978 DA, discovered in February 1978 with the ESO Schmidt telescope at La Silla (Chile), were observed with a photoelectric photometer attached to the 1-m...
Photoelectric lightcurves and rotation period of the minor planet 148 Gallia (1979)
Abstract image available at: http://esoads.eso.org/abs/1979A&AS...37..471S
Period and Spectroscopic Orbit of TU Hor (1979)
Duerbeck, H W, Surdej, A, Surdej, Jean
Abstract image available at: http://esoads.eso.org/abs/1979A&AS...36..283D
Line profiles in expanding envelopes (1979)
An attempt is made to show how the physical and geometrical parameters prevailing in an expanding stellar envelope can be inferred from an analysis of one or more observed line profiles. Attention is...
Short-term optical variability of HD 153919 = 4U1700-37 (1979)
Kruszewski, A, Zalewski, J, Surdej, Jean, Semeniuk, I
Photometric observations of HD 153919 are presented, which indicate optical cyclic variations with an amplitude of up to 0.02 mag, and a strong dependence of the amplitude on the orbital plane. From...
Simultaneous Photometry and Spectroscopy of the B2/E Variable Star HD45677 (1979)
Barbier, R, Klutz, N, Surdej, A, Surdej, Jean, Swings, Jean-Pierre
Changing Trends in Variable Star Research
Photoelectric lightcurves and rotation period of the minor planet 59 Elpis (1978)
Debehogne, H, Surdej, A, Surdej, Jean
Abstract image available at: http://esoads.eso.org/abs/1978A&AS...33....1D
Photometric observations of 1978CA and 1978DA (1978)
UBV photometric observations of the earth-crossing asteroid 1978 CA and the Mars-crosser 1978 DA are reported. Light curves are plotted which indicate that 1978 CA has a rotation period of...
Asteroid lightcurves simulated by the rotation of a three-axes ellipsoid model (1978)
A triaxial-ellipsoid model is used to simulate the smooth and nearly symmetric light curves that are usually characteristic of asteroids which exhibit large brightness variations. The mathematical...
Debehogne, H, Surdej, A, Surdej, Jean
The results are presented of photographic observations of asteroid positions made in August 1976 at La Silla, Chile. The quality of the sky characteristics made it possible to record objects with the...
IAUC 3290 available at Central Bureau for Astronomical Telegrams.
Comet Bradfield (1978c) (1978)
Surdej, Jean, Surdej, A, Herald, D, Seargent, D, Maley, P, Bouchet, P
IAUC 3185 available at Central Bureau for Astronomical Telegrams.
West, R M, Pizarro, O, Surdej, Jean
IAUC 3164 available at Central Bureau for Astronomical Telegrams.
Bergwall, N A S, Ekman, A B G, Lauberts, A, Westerlund, B E, Borchkhadze, T M, Breysacher, J, ...
Abstract image available at: http://esoads.eso.org/abs/1978A&AS...33..243B
The escape probability method developed by Sobolev (1947) is applied to the case of a two-level atom. The numerical applications are based on a previous work concerning a general theory of...
Photoelectric lightcurves of the minor planets 29 Amphitrite, 121 Hermione and 185 Eunike (1978)
Debehogne, H, Surdej, A, Surdej, Jean
Abstract image available at: http://esoads.eso.org/abs/1978A&AS...32..127D
Radiative forces in expanding envelopes (1978)
The escape probability method introduced by Sobolev (1957) is applied to derive expressions for the radiative forces acting on atoms by the resonance scattering of radiation in envelopes which expand...
Observations of high redshift QSO’s (1978)
Swings, Jean-Pierre, Surdej, Jean
Time-consuming observations with existing large telescopes have shown that the spectra of quasistellar objects are exceedingly complex. A VLT is needed to obtain the highest spectral resolution and...
Rotation period and photoelectric lightcurves of Asteroid 471 Papagena (1977)
Asteroid 471 Papagena was observed during the 1976 opposition with a photoelectric photometer attached to the 61-cm Bochum telescope at the European Southern Observatory. The light curve shows a very...
Orientation and structure of different components in the tail of comet West /1975n/ (1977)
The orientation and structure of various components in the tail of comet West are studied from plates obtained March 4-11, 1976, with a 60-cm Schmidt telescope. A wavelike structure appears on March...
Debehogne, H, Surdej, A, Surdej, Jean
Asteroids 599 Luisa and 128 Nemesis were observed photometrically at the European Southern Observatory during the 1976 opposition. The light curve of 599 Luisa shows two well-shaped minima and maxima...
The escape probability method introduced by Sobolev (1947) is used to derive the mean intensity of the radiation field at any point of an envelope which expands spherically with a positive or...
Surdej, Jean, Swings, Jean-Pierre
Abstract image available at: http://esoads.eso.org/abs/1977A&A....54..219S
Klutz, M, Surdej, A, Surdej, Jean, Swings, Jean-Pierre
IAU Colloquium 42 "THE INTERACTION OF VARIABLE STARS WITH THEIR ENVIRONMENT"
Periodic Comet d'Arrest (1976e) (1976)
Debehogne, H, Surdej, Jean, Surdej, A, Roman, G, Pizarro, M, Hers, J, ...
IAUC 3010 available at Central Bureau for Astronomical Telegrams.
Periodic Comet d'Arrest (1976e) (1976)
Jekabsons, C, Jekabsons, P, Candy, M P, Harwood, D, Helin, E, Bus, S J, ...
IAUC 2990 available at Central Bureau for Astronomical Telegrams.
Surdej, Jean, Swings, Jean-Pierre
Abstract image available at: http://esoads.eso.org/abs/1976A&A....47..113S
Surdej, Jean, Swings, Jean-Pierre
Abstract image available at: http://esoads.eso.org/abs/1976A&A....47..121S
Those tumbling asteroids (1976)
Once a small planet has been discovered (see 1. inst. Messenger No. 6, Sept. 1976) and its orbit determined, we can keep track of it and find it again in the sky at any time as a faint speck of...
Surdej, Jean, Swings, Jean-Pierre
IAU Symposium on "Be and Shell Stars"