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Advances in Astronomy
Volume 2010, Article ID 347935, 7 pages
Research Article

Robotic Monitoring of Gravitationally Lensed Quasars

1Departamento de Física Moderna, Universidad de Cantabria, Avda. de Los Castros s/n, 39005 Santander, Spain
2Institute for Radiophysics and Electronics, National Academy of Sciences of Ukraine, 12 Proskura Street, Kharkov 61085, Ukraine
3Robotic Telescopes Group, Centro de Astrobiología (CSIC-INTA), Ctra de Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain

Received 22 June 2009; Accepted 23 November 2009

Academic Editor: Joshua S. Bloom

Copyright © 2010 Luis J. Goicoechea et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We report on the first observational phase of the Liverpool Quasar Lens Monitoring (LQLM) project. This mainly consisted of the optical follow-up of three lensed quasars using the 2 m Liverpool Robotic Telescope. The observational subprogram started in January 2005 and was completed in July 2007. We also describe our photometric approaches (including two pipelines to extract accurate and reliable fluxes of images of lensed quasars), the performance of the telescope when taking modest nightly exposures of lens systems, and the main scientific results from the observed light curves. The LQLM archive and the current status of the project (second phase) are also outlined.