Analysis of the Difference Light Curve of the Gravitational Mirage QSO 0957+561 |
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| Authors: | R Gil-Merino LJ Goicoechea M Serra A Oscoz E Mediavilla J Buitrago |
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| Institution: | (1) Departamento de Fisica Moderna, Universidad de Cantabria, Avda. de los Castros, E-39005 Santander Cantabria, (Spain) E-mail;(2) Instituto de Astrofisica de Canarias (IAC) Via Lactea, E-38200 La Laguna Tenerife, (Spain) E-mail |
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| Abstract: | From optical data of Q0957+561 for 1995/1996 seasons (in the g band) and 1996/1997 seasons (in the R band) they are derived
upper limits on the amplitude of the rapid microlensing fluctuations of 0.07 mag and 0.05 mag, respectively. The photometry
in the R band (1996/1997 seasons) was taken at Teide Observatory (IAC-80 Telescope), Instituto de Astrofisica de Canarias,
Spain. In this contribution, we also study the microlensing history (from 1981 to 1996) of the Twin QSO, which is a curious
system with two optical images of similar brightness.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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