Eigenbrod, A., Courbin, F., Meylan, G., Agol, E., Anguita, T., Schmidt, R. W., ...
We present the continuation of our long-term spectroscopic monitoring of the gravitationally lensed quasar QSO 2237+0305. We investigate the chromatic variations observed in the UV/optical continuum...
Sluse, D., Courbin, F., Eigenbrod, A., Meylan, G.
We present the first VLT near-IR observations of a gravitationally lensed quasar, using adaptive optics and laser guide star. These observations can be considered as a test bench for future...
Microlensing to probe the quasar structure: spectrophotometry of Q2237+0305 and of J1131-1231 (2008)
Sluse, D., Eigenbrod, A., Courbin, F., Hutsemékers, D., Meylan, G., ...
We present the main results of the first long-term spectrophotometric monitoring of the ``Einstein cross'' Q2237+0305 and of the single-epoch spectra of the lensed quasar J1131-1231. From October...
Microlensing variability in the gravitationally lensed quasar Q2237+0305 = the Einstein Cross (2008)
Eigenbrod, A., Courbin, F., Sluse, D., Meylan, G., Agol, E.
We present the results of the first long-term (2.2 years) spectroscopic monitoring of a gravitationally lensed quasar, namely the Einstein Cross Q2237+0305. We spatially deconvolve deep VLT/FORS1...
Vuissoz, C., Courbin, F., Sluse, D., Meylan, G., Chantry, V., Eulaers, E., ...
Gravitationally lensed quasars can be used to map the mass distribution in lensing galaxies and to estimate the Hubble constant H0 by measuring the time delays between the quasar images. Here we...
Courbin, F., North, P., Eigenbrod, A., Chelouche, D.
We report the first results of a spectroscopic search for Lyman alpha, envelopes around three z=4.5 radio-quiet quasars. Our observational strategy uses the FORS2 spectrograph attached to the UT1 of...
Letawe, Y., Magain, P., Letawe, G., Courbin, F., Hutsemékers, D.
The host galaxies of six nearby QSOs are studied on the basis of high resolution HST optical images and spatially resolved VLT slit spectra. The gas ionization and velocity are mapped as a function...
The Interest In, F. Courbin, C. Lidman, I. Burud, J. Hjorth, P. Magain, ...
this report recent VLT FORS2 observations of HE 1104-1805, a doubly imaged quasar at z=2.319 discovered in the framework of the Hamburg-ESO survey for bright quasars (Wisotzki et al. 1993). The...
Detection of the lensing galaxy in HE 1104-1805 (2007)
Courbin Lidman And, F. Courbin, C. Lidman, P. Magain
. We report on deep IR imaging of the double quasar HE 1104--1805. A new image deconvolution technique has been applied to the data in order to optimally combine the numerous frames obtained. The...
High resolution optical and near-IR imaging of the quadruple quasar RX J0911.4+0551 (2007)
I. Burud, F. Courbin, C. Lidman, A. O. Jaunsen, J. Hjorth, M. I. Andersen, ...
We report the detection of four images in the recently discovered lensed QSO RX J0911.4+0551. With a maximum angular separation of 3:1 00 , it is the quadruply imaged QSO with the widest known...
Image Deconvolution of the Radio Ring PKS 1830--211 (2007)
F. Courbin, C. Lidman, B. L. Frye, P. Magain, T. J. Broadhurst, ...
New high quality Keck and ESO images of PKS 1830--211 are presented. Applying a powerful new deconvolution algorithm to these optical and infrared data, both images of the flat spectrum core of the...
Three photometric methods tested on ground-based data of Q 2237+0305 (2007)
Burud Stabell Magain, I. Burud, R. Stabell, F. Courbin, S. Refsdal, M. Remy
. The Einstein Cross, Q 2237+0305, has been photometrically observed in four bands on two successive nights at NOT (La Palma, Spain) in October 1995. Three independent algorithms have been used to...
The redshift of the gravitationally lensed radio source PKS (2007)
Gamma Lidman, C. Lidman, F. Courbin, G. Meylan, T. Broadhurst, B. Frye, ...
We report on the spectroscopic identification and the long awaited redshift measurement of the heavily obscured, gravitationally lensed radio source PKS 1830211, which was first observed as a radio...
About the origin of extinction in the gravitational lens system MG J0414+0534 (2007)
C. Vanderriest, F. Courbin, I. Burud, F. Rigaut
. Photometric measurements of the highly reddened gravitational mirage MG J0414+0534 have been carried out either by PSF subtraction or by applying accurate deconvolution algorithms to optical (R, I)...
The geometry of the quadruply imaged quasar PG 1115+080; implications for (2007)
Courbin Magain, F. Courbin, C. R. Keeton, C. S. Kochanek, C. Vanderriest
. Time delay measurements have recently been reported for the lensed quasar PG 1115+080. These measurements can be used to derive H 0 , but only if we can constrain the lensing potential. We have...
Astronomy And Astrophysics (2007)
Pox The, V. Doublier, D. Kunth, F. Courbin, P. Magain
. High resolution, ground based R and I band observations of the ultra compact dwarf galaxy POX 186 are presented. The data, obtained with the ESO New Technology Telescope (NTT), are analyzed using a...
The LMC transition star R 84 and the core of the LH 39 OB association (2007)
Heydari-Malayeri Courbin, M. Heydari-malayeri, F. Courbin, G. Rauw, O. Esslinger, P. Magain
. On the basis of sub-arcsecond imaging obtained at the ESO NTT with SUSI and the ESO ADONIS adaptive optics system at the 3.6 m telescope, we resolve and study the core components of the LMC OB...
Image Deconvolution of the Radio Ring PKS 1830--211 1 (2007)
F. Courbin, C. Lidman, B. L. Frye, P. Magain, T. J. Broadhurst, M. A. Pahre, ...
New high quality Keck and ESO images of PKS 1830--211 are presented. Applying a powerful new deconvolution algorithm to this optical and infrared data, both images of the flat spectrum core of the...
Simultaneous Estimation of Time Delays and Quasar Structure (2007)
Morgan, Christopher W., Eyler, Michael E., Kochanek, C. S., Morgan, Nicholas D., Falco, Emilio E., Vuissoz, Christel, ...
We expand our Bayesian Monte Carlo method for analyzing the light curves of gravitationally lensed quasars to simultaneously estimate time delays and quasar structure including their mutual...
Slit and integral-field optical spectroscopy of the enigmatic quasar HE0450-2958 (2007)
Letawe, G., Magain, P., Courbin, F.
Interest in the quasar HE0450-2958 arose following the publication of the non-detection of its expected massive host, leading to various interpretations. This article investigates the gaseous and...
Eigenbrod, A., Courbin, F., Sluse, D., Meylan, G., Agol, E.
We present the results of the first long-term (2.2 years) spectroscopic monitoring of a gravitationally lensed quasar, namely the Einstein Cross Q2237+0305. The goal of this paper is to present the...
Willis, J. P., Courbin, F., Kneib, J. P., Minniti, D.
We present the results of a continuing survey to detect Lya emitting galaxies at redshifts z~9: the ZEN ("z equals nine'') survey. We have obtained deep VLT/ISAAC observations in the narrow J-band...
Letawe, Géraldine, Magain, Pierre, Courbin, F, Jablonka, P, Jahnke, K, Meylan, G, ...
We present the analysis of a sample of 20 bright low-redshift quasars (M-B < -23 and z < 0.35) observed spectroscopically with the Very Large Telescope (VLT). The Focal Reducer/low dispersion...
Courbin, F, Sluse, D, Meylan, G, Ibrahimov, M, Asfandiyarov, I, ...
Our aim is to measure the time delay between the two gravitationally lensed images of the z(qso) = 1.547 quasar SDSS J1650+ 4251, in order to estimate the Hubble constant H-0.
Discovery of a Probable Physical Triple Quasar (2007)
Djorgovski, S. G., Courbin, F., Meylan, G., Sluse, D., Thompson, D. J., Mahabal, A., ...
We report the discovery of the first known probable case of a physical triple quasar (not a gravitational lens). A previously known double system, QQ 1429-008 at z = 2.076, is shown to contain a...
On-axis spectroscopy of the host galaxies of 20 optically luminous quasars at z ~ 0.3 (2007)
Letawe, G., Magain, P., Courbin, F., Jablonka, P., Jahnke, K., Meylan, G., ...
We present the analysis of a sample of 20 bright low-redshift quasars (MB < -23 and z < 0.35) observed spectroscopically with the Very Large Telescope (VLT). The Focal Reducer/low dispersion...
Spatial decomposition of on-nucleus spectra of quasar host galaxies (2007)
Jahnke, K., Wisotzki, L., Courbin, F., Letawe, G.
In order to study the host galaxies of type 1 (broad-line) quasars, we present a semi-analytic modelling method to decompose the on-nucleus spectra of quasars into nuclear and host galaxy channels....
Eigenbrod, A., Courbin, F., Meylan, G.
Aims: The knowledge of the redshift of a lensing galaxy that produces multiple images of a background quasar is essential to any subsequent modeling, whether related to the determination of the...
Gillon, Michaël, Pont, F, Moutou, C, Bouchy, F, Courbin, F, Sohy, Sandrine, ...
A high accuracy photometry algorithm is needed to take full advantage of the potential of the transit method for the characterization of exoplanets, especially in deep crowded fields. It has to...
Magain, P., Courbin, F., Gillon, M., Sohy, S., Letawe, G., Chantry, V., ...
A new method is presented for determining the Point Spread Function (PSF) of images that lack bright and isolated stars. It is based on the same principles as the MCS (Magain, Courbin, Sohy, 1998)...
Gillon, M., Pont, F., Moutou, C., Bouchy, F., Courbin, F., Sohy, S., ...
A high accuracy photometry algorithm is needed to take full advantage of the potential of the transit method for the characterization of exoplanets, especially in deep crowded fields. It has to...
Gillon, M., Pont, F., Moutou, C., Bouchy, F., Courbin, F., Sohy, S., ...
A high accuracy photometry algorithm is needed to take full advantage of the potential of the transit method for the characterization of exoplanets, especially in deep crowded fields. It has to...
Vuissoz, C., Courbin, F., Sluse, D., Meylan, G., Ibrahimov, M., Asfandiyarov, I., ...
Aims: Our aim is to measure the time delay between the two gravitationally lensed images of the z = 1.547 quasar SDSS J1650+4251, in order to estimate the Hubble constant H_0. Methods: Our...
On-axis spectroscopy of the host galaxies of 20 optically luminous quasars at z~0.3 (2006)
Letawe, G., Magain, P., Courbin, F., Jablonka, P., Jahnke, K., Meylan, G., ...
We present the analysis of a sample of 20 bright low-redshift quasars (M_B
ZEN and the search for high-redshift galaxies (2006)
Willis, J. P., Courbin, F., Kneib, J-P., Minniti, D.
We present the ZEN (z equals nine) survey: a deep, narrow J-band search for proto-galactic Lya emission at redshifts z=9. In the first phase of the survey, dubbed ZEN1, we combine an exceptionally...
Saha, P., Courbin, F., Sluse, D., Dye, S., Meylan, G.
Aims: To predict time delays for a sample of gravitationally lensed quasars and to evaluate the accuracy that can be realistically achieved on the value of H_0. Methods: We consider 14 lensed quasars...
Gillon, M., Pont, F., Moutou, C., Bouchy, F., Courbin, F., Sohy, S., ...
A high accuracy photometry algorithm is needed to take full advantage of the potential of the transit method for the characterization of exoplanets, especially in deep crowded fields. It has to...
Gillon, M., Pont, F., Moutou, C., Bouchy, F., Courbin, F., Sohy, S., ...
A high accuracy photometry algorithm is needed to take full advantage of the potential of the transit method for the characterization of exoplanets, especially in deep crowded fields. It has to...
VLT on-axis spectroscopy of quasar host galaxies (2006)
Letawe, G., Magain, P., Courbin, F., Jablonka, P., Meylan, G., Jahnke, K., ...
We present the full analysis of our sample of 20 bright low redshift quasars (MB < -23 and z < 0.35), observed spectroscopically with the VLT FORS1, with objectives of characterizing the hosts and...
Eigenbrod, A., Courbin, F., Meylan, G., Vuissoz, C., Magain, P.
Aims: We measure the redshift of the lensing galaxy in eight gravitationally lensed quasars in view of determining the Hubble parameter H_0 from the time delay method. Methods: Deep VLT/FORS1 spectra...
On the potential of extrasolar planet transit surveys (2005)
Gillon, Michaël, Courbin, F, Magain, Pierre, Borguet, Benoît
We analyse the respective benefits and drawbacks of ground-based and space-based transit surveys for extrasolar planets. Based on simple but realistic assumptions about the fraction of lower main...
Eigenbrod, A., Courbin, F., Dye, S., Meylan, G., Sluse, D., Saha, P., ...
(Abridged) We present our VLT/FORS1 deep spectroscopic observations of the gravitationally lensed quasar SDSS J0924+0219, as well as archival HST/NICMOS and ACS images of the same object. The...
A search for clusters and groups of galaxies on the line of sight towards 8 lensed quasars (2005)
Faure, C., Alloin, D., Courbin, F.
In this paper we present new ESO/VLT FORS1 and ISAAC images of the fields around eight gravitationally lensed quasars: CTQ414, HE0230-2130, LBQS1009-0252, B1030+074, HE1104-1805, B1359+154, H1413+117...
LBQS 1429-0053: a binary quasar rather than a lensed quasar (2005)
Faure, C., Alloin, D., Gras, S., Courbin, F., Hudelot, P.
Very deep ESO/VLT FORS1 and ISAAC images, as well as HST NICMOS2 data are used to infer the nature of the quasar pair LBQS 1429-0053 A and B, either a binary quasar or a doubly-imaged lensed quasar....
The lensing system towards the doubly imaged quasar SBS 1520+530 (2005)
Faure, C., Courbin, F., Alloin, D., Bolzonella, M., Burud, I.
The gravitational potential responsible for the lensing effect in SBS 1520+530 is studied over length scales from a few arc-seconds to a few arc-minutes. For this purpose, we use sharply deconvolved...
Courbin, F., Letawe, G., Magain, P., Wisotzki, L., Jablonka, P., Jahnke, K., ...
We present the first result of a comprehensive spectroscopic study of quasar host galaxies. On-axis, spatially resolved spectra of low redshift quasars have been obtained with FORS1, mounted on the...
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...
ZEN and the search for high-redshift galaxies (2005)
Willis, J. P., Courbin, F., Kneib, J-P., Minniti, D.
We present the ZEN (z equals nine) survey: a deep, narrow J-band search for proto-galactic Lya emission at redshifts z=9. In the first phase of the survey, dubbed ZEN1, we combine an exceptionally...
On the potential of extrasolar planet transit surveys (2005)
Gillon, M., Courbin, F., Magain, P., Borguet, B.
We analyse the respective benefits and drawbacks of ground-based and space-based transit surveys for extrasolar planets. Based on simple but realistic assumptions about the fraction of lower main...
Nakos, Th., Courbin, F., Poels, J., Libbrecht, C., Magain, P., Surdej, J., ...
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...
Meylan, G., Courbin, F., Lidman, C., Tacconi-Garman, L. E.
We report on new high-resolution near-infrared images of the gravitationally lensed radio source PKS1830-211, a quasar at z=2.507. These adaptive optics observations, taken with the Very Large...
Eigenbrod, A., Courbin, F., Vuissoz, C., Meylan, G., Saha, P., Dye, S.
We use numerical simulations to test a broad range of plausible observational strategies designed to measure the time delay between the images of gravitationally lensed quasars. Artificial quasar...
ZEN and the search for high-redshift galaxies (2005)
Willis, J. P., Courbin, F., Kneib, J-P., Minniti, D.
We present the ZEN (z equals nine) survey: a deep, narrow J-band search for proto-galactic Lya emission at redshifts z=9. In the first phase of the survey, dubbed ZEN1, we combine an exceptionally...
ZEN and the search for high-redshift galaxies (2005)
Willis, J. P., Courbin, F., Kneib, J-P., Minniti, D.
We present the ZEN (z equals nine) survey: a deep, narrow J-band search for proto-galactic Lya emission at redshifts z=9. In the first phase of the survey, dubbed ZEN1, we combine an exceptionally...
Nakos, T., Courbin, F., Poels, J., Libbrecht, C., Magain, P., Surdej, J., ...
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...
An optical time delay for the double gravitational lens system FBQ 0951+2635. (2005)
Jakobsson, P., Hjorth, J., Burud, I., Letawe, G., Lidman, C., Courbin, F.
Nakos, T., Courbin, F., Poels, J., Libbrecht, C., Magain, P., Surdej, J., ...
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...
Nakos, T., Courbin, F., Poels, J., Libbrecht, C., Magain, P., Surdej, J., ...
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...
Nakos, T., Courbin, F., Poels, J., Libbrecht, C., Magain, P., Surdej, J., ...
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...
Nakos, T., Courbin, F., Poels, J., Libbrecht, C., Magain, P., Surdej, J., ...
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...
A deep, narrow J-band search for proto-galactic Lyman Alpha emission at redshifts z~9 (2004)
We present a deep, narrow J-band search for proto--galactic Lyman Alpha emission at redshifts z~9. We combine an exceptionally deep image of the Hubble Deep Field South, obtained using a narrow band...
An optical time delay for the double gravitational lens system FBQ 0951+2635 (2004)
Jakobsson, P., Hjorth, J., Burud, I., Letawe, G., Lidman, C., Courbin, F.
We present optical R-band light curves of the double gravitationally lensed quasar FBQ 0951+2635 from observations obtained at the Nordic Optical Telescope between March 1999 and June 2001. A time...
A search for clusters and groups of galaxies on the line of sight towards 8 lensed quasars (2004)
Faure, C., Alloin, D., Courbin, F.
In this paper we present new ESO/VLT FORS1 and ISAAC images of the fields around eight gravitationally lensed quasars: CTQ414, HE0230-2130, LBQS1009-0252, B1030+074, HE1104-1805, B1359+154, H1413+117...
Letawe, G., Courbin, F., Magain, P., Hilker, M., Jablonka, P., Jahnke, K., ...
VLT on-axis optical spectroscopy of the z=0.144 radio-loud quasar HE 1434-1600 is presented. The spatially resolved spectra of the host galaxy are deconvolved and separated from those of the central...
A search for clusters and groups of galaxies on the line of sight towards 8 lensed quasars (2004)
Faure, C., Alloin, D., Courbin, F.
In this paper we present new ESO/VLT FORS1 and ISAAC images of the fields around eight gravitationally lensed quasars: CTQ414, HE0230-2130, LBQS1009-0252, B1030+074, HE1104-1805, B1359+154, H1413+117...
A search for clusters and groups of galaxies on the line of sight towards 8 lensed quasars (2004)
Faure, C., Alloin, D., Courbin, F.
In this paper we present new ESO/VLT FORS1 and ISAAC images of the fields around eight gravitationally lensed quasars: CTQ414, HE0230-2130, LBQS1009-0252, B1030+074, HE1104-1805, B1359+154, H1413+117...
A quadruply imaged quasar with an optical Einstein ring candidate: 1RXS J113155.4-123155 (2003)
Sluse, D., Surdej, J., Hutsemekers, D., 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...
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...
Quasar Lensing: the Observer's Point of View (2003)
The determination of the Hubble parameter H_0 is probably one of the most important applications of quasar lensing. The method, based on the measurement of the so-called ``time-delay'' between the...
LBQS 1429-0053: a binary quasar rather than a lensed quasar (2003)
Faure, C., Alloin, D., Gras, S., Courbin, F., Hudelot, P.
Very deep ESO/VLT FORS1 and ISAAC images, as well as HST NICMOS2 data are used to infer the nature of the quasar pair LBQS 1429-0053 A and B, either a binary quasar or a doubly-imaged lensed quasar....
LBQS 1429-0053: a binary quasar rather than a lensed quasar (2003)
Faure, C., Alloin, D., Gras, S., Courbin, F., Hudelot, P.
Very deep ESO/VLT FORS1 and ISAAC images, as well as HST NICMOS2 data are used to infer the nature of the quasar pair LBQS 1429-0053 A and B, either a binary quasar or a doubly-imaged lensed quasar....
LBQS 1429-0053: a binary quasar rather than a lensed quasar (2003)
Faure, C., Alloin, D., Gras, S., Courbin, F., Hudelot, P.
Very deep ESO/VLT FORS1 and ISAAC images, as well as HST NICMOS2 data are used to infer the nature of the quasar pair LBQS 1429-0053 A and B, either a binary quasar or a doubly-imaged lensed quasar....
Courbin, F., Letawe, G., Magain, P., Wisotzki, L., Jablonka, P., Jahnke, K., ...
We present the first result of a comprehensive spectroscopic study of quasar host galaxies. On-axis, spatially resolved spectra of low redshift quasars have been obtained with FORS1, mounted on the...
Courbin, F., Saha, P., Schechter, P. L.
Massive structures, such as galaxies, act as strong gravitational lenses on background sources. When the background source is a quasar, several lensed images are seen, as magnified or de-magnified...
Time delay and lens redshift for the doubly imaged BAL quasar SBS1520+530 (2002)
Burud, I., Hjorth, J., Courbin, F., Cohen, J. G., Magain, P., Jaunsen, A. O., ...
We present optical R-band light curves of the gravitationally lensed quasar SBS1520+530 derived from data obtained at the Nordic Optical Telescope. A time delay of 130+/-3 days (1 sigma) is...
Cosmic alignment towards the radio Einstein ring PKS 1830-211 ? (2002)
Courbin, F., Meylan, G., Kneib, J. P., Lidman, C.
Optical and near-IR Hubble Space Telescope and Gemini-North adaptive optics images, further improved through deconvolution, are used to explore the gravitationally lensed radio source PKS 1830-211....
The lensing system towards the doubly imaged quasar SBS 1520+530 (2002)
Faure, C., Courbin, F., Kneib, J. P., Alloin, D., Bolzonella, M., Burud, I.
The gravitational potential responsible for the lensing effect in SBS 1520+530 is studied over length scales from a few arc-seconds to a few arc-minutes. For this purpose, we use sharply deconvolved...
The lensing system towards the doubly imaged quasar SBS 1520+530 (2002)
Faure, C., Courbin, F., Alloin, D., Bolzonella, M., Burud, I.
The gravitational potential responsible for the lensing effect in SBS 1520+530 is studied over length scales from a few arc-seconds to a few arc-minutes. For this purpose, we use sharply deconvolved...
Courbin, F., Letawe, G., Magain, P., Wisotzki, L., Jablonka, P., Jahnke, K., ...
We present the first result of a comprehensive spectroscopic study of quasar host galaxies. On-axis, spatially resolved spectra of low redshift quasars have been obtained with FORS1, mounted on the...
The lensing system towards the doubly imaged quasar SBS 1520+530 (2002)
Faure, C., Courbin, F., Alloin, D., Bolzonella, M., Burud, I.
The gravitational potential responsible for the lensing effect in SBS 1520+530 is studied over length scales from a few arc-seconds to a few arc-minutes. For this purpose, we use sharply deconvolved...
Courbin, F., Letawe, G., Magain, P., Wisotzki, L., Jablonka, P., Jahnke, K., ...
We present the first result of a comprehensive spectroscopic study of quasar host galaxies. On-axis, spatially resolved spectra of low redshift quasars have been obtained with FORS1, mounted on the...
An Optical Time-Delay for the Lensed BAL Quasar HE2149-2745 (2001)
Burud, I., Courbin, F., Magain, P., Lidman, C., Hutsemekers, D., ...
We present optical V and i-band light curves of the gravitationally lensed BAL quasar HE2149-2745. The data, obtained with the 1.5m Danish Telescope (ESO-La Silla) between October 1998 and December...
Rejkuba, M., Minniti, D., Courbin, F., Silva, D. R.
We used the direct CCD camera at the Magellan I telescope at Las Campanas Observatory and FORS1 at Antu VLT at ESO Paranal Observatory to image fields centered on the inner and outer optical...
The FALCON concept: multi-object spectroscopy combined with MCAO in near-IR (2001)
Hammer, F., Sayède, F., Gendron, E., Fusco, T., Burgarella, D., Cayatte, V., ...
A large fraction of the present-day stellar mass was formed between z=0.5 and z~3 and our understanding of the formation mechanisms at work at these epochs requires both high spatial and high...
Lidman, C., Courbin, F., Golse, G., Castander, F., Soucail, G.
Using FORS2, mounted on Kueyen (UT2 of the VLT), we have obtained the redshift of the lensing galaxy in the gravitational lens system HE1104-1805. We measure z=0.729, in good agreement with previous...
Exploring the gravitationally lensed system HE 1104-1805: Near-IR Spectroscopy (2000)
Courbin, F., Lidman, C., Meylan, G., Magain, P.
(Abridged) A new technique for the spatial deconvolution of spectra is applied to near-IR (0.95 - 2.50 micron) NTT/SOFI spectra of the lensed, radio-quiet quasar HE 1104-1805. The continuum of the...
Resolved Stellar Populations of Super-Metal-Rich Star Clusters in the Bulge of M31 (2000)
Jablonka, P., Courbin, F., Meylan, G., Sarajedini, A., Bridges, T. J., Magain, P.
We have applied the MCS image deconvolution algorithm (Magain, Courbin & Sohy 1998) to HST/WFPC2 V, I data of three M31 bulge globular clusters (G170, G177, and G198) and control fields near each...
Discovery of the optical counterpart and early optical observations of GRB 990712 (2000)
Sahu, K.C., Vreeswijk, P.M., Bakos, G., Menzies, J.W., Bragaglia, A., Frontera, F., ...
Discovery of the Optical Counterpart and Early Optical Observations of GRB 990712 (2000)
Sahu, KC, Vreeswijk, P, Bakos, G, Menzies, JW, Bragaglia, A, Frontera, F, ...
A method for spatial deconvolution of spectra (1999)
Courbin, F., Magain, P., Kirkove, M., Sohy, S.
A method for spatial deconvolution of spectra is presented. It follows the same fundamental principles as the ``MCS image deconvolution algorithm'' (Magain, Courbin, Sohy, 1998) and uses information...
The redshift of the gravitationally lensed radio source PKS1830-211 (1999)
Lidman, C., Courbin, F., Meylan, G., Broadhurst, T., Frye, B., Welch, W. J. W.
We report on the spectroscopic identification and the long awaited redshift measurement of the heavily obscured, gravitationally lensed radio source PKS 1830-211, which was first observed as a radio...
POX 186: the ultracompact Blue Compact Dwarf Galaxy reveals its nature (1999)
Doublier, V., Kunth, D., Courbin, F., Magain, P.
High resolution, ground based R and I band observations of the ultra compact dwarf galaxy POX 186 are presented. The data, obtained with the ESO New Technology Telescope (NTT), are analyzed using a...
Three photometric methods tested on ground-based data of Q 2237+0305 (1998)
Burud, I., Stabell, R., Magain, P., Courbin, F., Ostensen, R., Refsdal, S., ...
The Einstein Cross, Q~2237+0305, has been photometrically observed in four bands on two successive nights at NOT (La Palma, Spain) in October 1995. Three independent algorithms have been used to...
High resolution optical and near-IR imaging of the quadruple quasar RX J0911.4+0551 (1998)
Burud, I., Courbin, F., Lidman, C., Jaunsen, A., Hjorth, J., Ostensen, R., ...
We report the detection of four images in the recently discovered lensed QSO RX J0911.4+0551. With a maximum angular separation of 3.1", it is the quadruply imaged QSO with the widest known angular...
BIMA and Keck Imaging of the Radio Ring PKS 1830-211 (1998)
Frye, B. L., Courbin, F., Broadhurst, T., Welch, W. J. W., Lidman, C., Magain, P., ...
We discuss BIMA (Berkeley Illinois Maryland Association) data and present new high quality optical and near-IR Keck images of the bright radio ring PKS 1830-211. Applying a powerful new deconvolution...
Image Deconvolution of the Radio Ring PKS 1830-211 (1998)
Courbin, F., Lidman, C., Frye, B., Magain, P., Broadhurst, T. J., Pahre, M. A., ...
New high quality Keck and ESO images of PKS 1830-211 are presented. Applying a powerful new deconvolution algorithm to these optical and infrared data, both images of the flat spectrum core of the...
The LMC transition star R 84 and the core of the LH 39 OB association. (1997)
Heydari-Malayeri, M, Courbin, F, Rauw, Grégor, Esslinger, O, Magain, Pierre
On the basis of sub-arcsecond imaging obtained at the ESO NTT with SUSI and the ESO ADONIS adaptive optics system at the 3.6m telescope, we resolve and study the core components of the LMC OB...
Detection of the lensing galaxy in HE 1104-1805 (1997)
Courbin, F., Lidman, C., Magain, P.
We report on deep IR imaging of the double quasar HE 1104-1805. A new image deconvolution technique has been applied to the data in order to optimally combine the numerous frames obtained. The...
Stellar populations from adaptive optics observations: four test cases (1997)
Bedding, T. R., Minniti, D., Courbin, F., Sams, B.
We describe a first attempt to apply adaptive optics to the study of resolved stellar populations in galaxies. Advantages over traditional approaches are (i) improved spatial resolution and...
The LMC transition star R84 and the core of the LH 39 OB association (1997)
Heydari-Malayeri, M., Courbin, F., Rauw, G., Esslinger, O., Magain, P.
On the basis of sub-arcsecond optical imaging we resolve and study the core components of the LMC OB association LH 39. The central star of the association, the rare transition object R84, is also...
The geometry of the quadruply imaged quasar PG 1115+080; implications for Ho (1997)
Courbin, F., Magain, P., Keeton, C. R., Kochanek, C. S., Vanderriest, C., Jaunsen, A. O., ...
Time delay measurements have recently been reported for the lensed quasar PG 1115+080. These measurements can be used to derive Ho, but only if we can constrain the lensing potential. We have applied...
Deconvolution with correct sampling (1997)
Magain, P., Courbin, F., Sohy, S.
A new method for improving the resolution of astronomical images is presented. It is based on the principle that sampled data cannot be fully deconvolved without violating the sampling theorem. Thus,...
The geometry of the quadruply imaged quasar PG1115+080; implications for H0 (1997)
F. Courbin, P. Magain, C. R. Keeton, C. S. Kochanek, C. Vanderriest
. Time delay measurements have recently been reported for the lensed quasar PG 1115+080. These measurements can be used to derive H 0 , but only if we can constrain the lensing potential. We have...
Sub-arcsecond imaging and spectroscopy of the radio-loud highly polarized quasar PKS 1610-771 (1996)
Courbin, F., Hutsemekers, D., Meylan, G., Magain, P., Djorgovski, S. G.
We report on imaging and spectroscopic observations of the radio-loud, highly polarized quasar PKS 1610-771 (z = 1.71). Our long-slit spectroscopy of the companion 4.55 arcseconds NW of the quasar...
Photometric monitoring (1987 to 1994) of the gravitational lens candidate UM 425 (1995)
Courbin, F., Magain, P., Remy, M., Smette, A., S, J. F. Claesken, Hainaut, O., ...
We present the results of a 7 year long photometric monitoring of two components (A and B) of UM 425, thought to be images, separated by 6.5", of the same z = 1.47 quasar. These components have been...