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ATEL # 1990; V. M. Larionov (Astronomical Institute, St.-Petersburg State University, Russia, and Pulkovo Observatory, Russia), M. Villata and C. M. Raiteri (INAF, Osservatorio Astronomico di Torino, Italy), A. A. Arkharov, T. S. Konstantinova, E. N. Kopatskaya, E. G. Larionova, D. Blinov, D. Melnichuk, and I. Troitsky (Astronomical Institute, St.-Petersburg State University, Russia, and Pulkovo Observatory, Russia), for the GASP Collaboration
on 27 Mar 2009; 13:06 UT
Password Certification: Claudia M. Raiteri (firstname.lastname@example.org)
Subjects: Optical, AGN, Quasars
With reference to ATel #1988 (and references therein) on the optical and near-IR brightening of the blazar PKS 1510−08, the GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT) reports that the source has further brightened by almost 1 mag in the last 3 days, reaching R = 14.35 ± 0.03 on March 27.1. As far as we know, this is the brightest optical state ever observed for this object. Observations at all wavelengths are obviously strongly encouraged.