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Simultaneous Estimation of Time Delays and Quasar Structure
Christopher W. Morgan, Michael E. Eyler, C. S. Kochanek +5
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 the…
ZEN2: A narrow J-band search for z~9 Lya emitting galaxies directed towards three lensing clusters
J. P. Willis, F. Courbin, J. P. Kneib +1
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 t…
Slit and integral-field optical spectroscopy of the enigmatic quasar HE0450-2958
G. Letawe, P. Magain, F. Courbin
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…
Microlensing variability in the gravitationally lensed quasar Q2237+0305 = the Einstein Cross, I. Spectrophotometric monitoring with the VLT
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. The goal of this paper…
Spatial decomposition of on-nucleus spectra of quasar host galaxies
Knud Jahnke, Lutz Wisotzki, Frederic Courbin +1
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…
DECPHOT: an optimal deconvolution-based photometric reduction method
M. Gillon, P. Magain, V. Chantry +5
A high accuracy photometric reduction method is needed to take full advantage of the potential of the transit method for the detection and characterization of exoplanets, especiall…