TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2616 SUBJECT: MASTER: GRB 040624 optical observation after 0,48d DATE: 04/06/25 09:50:34 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, A.Krylov, V.Kornilov, G.Borisov, D.Kuvshinov, A.Belinski, M.Kuznetsov, S.Potanin, G.Antipov,E.Gorbovskoy, N.Tyurina Sternberg Astronomical Institute, Alexsandr Krylov Observatory, Moscow We have observed the 6 sq. degrees field around INTEGRAL GRB 040624 with MASTER system (355 mm, http://observ.pereplet.ru). We have 15 unfiltered images of the error box (30s and 60s expositions) started at 24 June 2004 19:37:06 UT (after 0,48 day GRB 040624 time). The limiting magnitude on the each image was about 15m under very bad weather conditions. There is no OT at error circle as reported by INTEGRAL GCN2613. This message may be cited.