Frédéric Courbin

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Publications associées (229)

Slit and integral-field optical spectroscopy of the enigmatic quasar HE 0450-2958

Frédéric Courbin

Context. Interest in the quasar HE 0450-2958 arose following the publication of the non-detection of its expected massive host, leading to various interpretations. ...

2008

COSMOGRAIL: the COSmological MOnitoring of GRAvItational lenses - VII. Time delays and the Hubble constant from WFI J2033-4723

Georges Meylan, Christel Vuissoz, Frédéric Courbin

Gravitationally lensed quasars can be used to map the mass distribution in lensing galaxies and to estimate the Hubble constant H-0 by measuring the time delays between the quasar images. Here we report the measurement of two independent time delays in the ...

2008

Understanding the relations between QSOs and their host galaxies from combined HST imaging and VLT spectroscopy

Frédéric Courbin

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 of the distance to the central QSO. In the majority of the cas ...

2008

An exploratory search for z greater than or similar to 6 quasars in the ukidss early data release

Georges Meylan, Alexander Patrick Eigenbrod, Frédéric Courbin

We conducted an exploratory search for quasars at z similar to 6-8, using the Early Data Release (EDR) from the United Kingdom Infrared Deep Sky Survey (UKIDSS) cross-matched to panoramic optical imagery. High-redshift quasar candidates are chosen using mu ...

2008

A sharp look at the gravitationally lensed quasar SDSS J0806+2006 with laser guide star adaptive optics at the VLT

Georges Meylan, Alexander Patrick Eigenbrod, Frédéric Courbin

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 systematic observations of lensed quasars with adaptive optics, ev ...

2008

ZEN2: a narrow J-band search for z similar to 9 Ly alpha emitting galaxies directed towards three lensing clusters

Frédéric Courbin, Jean-Paul Richard Kneib

We present the results of a continuing survey to detect Ly alpha emitting galaxies at redshifts z similar to 9: the z equals nine' (ZEN) survey. We have obtained deep VLT Infrared Spectrometer and Array Camera observations in the narrow J-band filter NB119 ...

Blackwell Publishing Ltd, Oxford2008

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Frédéric Courbin

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Slit and integral-field optical spectroscopy of the enigmatic quasar HE 0450-2958

COSMOGRAIL: the COSmological MOnitoring of GRAvItational lenses - VII. Time delays and the Hubble constant from WFI J2033-4723

Understanding the relations between QSOs and their host galaxies from combined HST imaging and VLT spectroscopy

An exploratory search for z greater than or similar to 6 quasars in the ukidss early data release

A sharp look at the gravitationally lensed quasar SDSS J0806+2006 with laser guide star adaptive optics at the VLT

ZEN2: a narrow J-band search for z similar to 9 Ly alpha emitting galaxies directed towards three lensing clusters

Spatial decomposition of on-nucleus spectra of quasar host galaxies

On-axis spectroscopy of the host galaxies of 20 optically luminous quasars at z ∼ 0.3

A deep, narrow J-band search for protogalactic Lyα emission at redshifts z ∼ 9