74 citations · 74 across the 1 of their papers we have counts for
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Discovery of a bright quasar without a massive host galaxy
Pierre Magain, Geraldine Letawe, Frederic Courbin +4
Quasars are thought to be powered by the infall of matter onto a supermassive black hole at the centre of massive galaxies. As the optical luminosity of quasars exceeds that of the…
A novel approach for extracting time-delays from lightcurves of lensed quasar images
I. Burud, P. Magain, S. Sohy +1
We present a new method to estimate time delays from light curves of lensed quasars. The method is based on chi^2 minimization between the data and a numerical model light curve. A…
The Old Halo metallicity gradient: the trace of a self-enrichment process
G. Parmentier, E. Jehin, P. Magain +2
Based on a model of globular cluster self-enrichment published in a previous paper, we present an explanation for the metallicity gradient observed throughout the galactic Old Halo…
An optical time-delay estimate for the double gravitational lens system B1600+434
I. Burud, J. Hjorth, A. O. Jaunsen +7
We present optical I-band light curves of the gravitationally lensed double QSO B1600+434 from observations obtained at the Nordic Optical Telescope (NOT) between April 1998 and No…
Exploring the gravitationally lensed system HE 1104-1805: Near-IR Spectroscopy
F. Courbin, C. Lidman, G. Meylan +2
(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…
Resolved Stellar Populations of Super-Metal-Rich Star Clusters in the Bulge of M31
P. Jablonka, F. Courbin, G. Meylan +3
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 f…