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Microlensing variability in the gravitationally lensed quasar QSO 2237+0305 = the Einstein Cross. II. Energy profile of the accretion disk
A. Eigenbrod, F. Courbin, G. Meylan +4
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…
Microlensing to probe the quasar structure: spectrophotometry of Q2237+0305 and of J1131-1231
D. Sluse, A. Eigenbrod, F. Courbin +5
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 J1131-123…
A sharp look at the gravitationally lensed quasar SDSS J0806+2006 with Laser Guide Star Adaptive Optics
D. Sluse, F. Courbin, A. Eigenbrod +1
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 f…
Microlensing variability in the gravitationally lensed quasar Q2237+0305 = the Einstein Cross
A. Eigenbrod, F. Courbin, D. Sluse +2
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…
An Exploratory Search for z~6 Quasars in the UKIDSS Early Data Release
Eilat Glikman, Alexander Eigenbrod, S. G. Djorgovski +4
We conducted an exploratory search for quasars at z~ 6 - 8, using the Early Data Release from United Kingdom Infrared Deep Sky survey (UKIDSS) cross-matched to panoramic optical im…
Deep optical spectroscopy of extended Lyman alpha emission around three radio-quiet z=4.5 quasars
F. Courbin, P. North, A. Eigenbrod +1
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 atta…