2 papers
astro-ph2004
New VR magnification ratios of QSO 0957+561
L. J. Goicoechea, R. Gil-Merino, A. Ullan +5
We present VR magnification ratios of QSO 0957+561, which are inferred from the GLITP light curves of Q0957+561A and new frames taken with the 2.56m Nordic Optical Telescope about…
astro-ph2003
GLITP Optical Monitoring of QSO 0957+561: VR Light Curves and Variability
Aurora Ullan, Luis J. Goicoechea, Jose A. Munoz +6
The GLITP collaboration observed the first gravitational lens system (QSO 0957+561) from 2000 February 3 to 2000 March 31. The daily VR observations were made with the 2.56-m Nordi…