TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5056 SUBJECT: GRB 060502B: MASTER optical observations DATE: 06/05/02 19:34:26 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, N.Tyurina, A.Belinski, D.Kuvshinov, E.Gorbovskoy, A.Krylov, G.Borisov, A.Sankovich, V.Vladimirov, P.Gritsyk, S.Korobkin Sternberg Astronomical Institute, Moscow Union 'Optic' MASTER robotic system (http://observ.pereplet.ru) responded to GRB060502B (GRB_TIME is 2006-05-02 17:24:41.07, E. Troja et al. GCN5055) by unfiltered, BVR-filtered, spectral and high time resolution cameras. The first image was at 2006-05-02 17:25:50.11 UT, 69 s after the GRB time on the bright evening sky. The first images with more or less good limit was at 82 min after the GRB time at high air mass. The unfiltered image is calibrated relative to USNO A2.0 (0.8 R + 0.2 B). The robot not find OT-candidate in error box brighter then 16.0 (s/n=5) at Swift XRT position. This work is supported by RFFI 04-02-16411 grant. This message can be cited. Mailto: lipunov@sai.msu.ru