TITLE: GCN CIRCULAR NUMBER: 10463 SUBJECT: GRB 100302A: MASTER-Net optical alert observations DATE: 10/03/03 11:31:50 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Yurkov, S.Sergienko, D.Varda, Blagoveschensk Educational State University, Blagoveschensk E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zemnukhov, M. Kornilov Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnih, T.Kopytova, A. Popov Ural State University, Kourovka K.Ivanov, S.Yazev, N.M.Budnev, E.Konstantinov, V.Lenok Irkutsk State University MASTER robotic telescope (MASTER-Net: http://observ.pereplet.ru, 200 mm, FOV=8 square degrees (testing telescope) and Very Wide Field Camera (D=50 mm, 1000 square degrees, 11 Mpx, 36" per pix, mounted on telescope) located at Blagoveschensk was responted to the GRB 100302A (Swift Bat alert, Cummings et al, GCN CIRC 10458) 51 sec after Notice time and 139 s after the GRB time. There is now OT in our images inside Swift XRT error box (Goad et al., GCN CIRC 10460). GRB_time start UT end UT t_exp(s) mlim Coadd? ------------------------------------------------------------------- 139s 19:55:25 19:55:55 30 16.9 no 139s-4046s 19:55:25 21:14:17 4020 18.5 68 The coadded image is available at http://observ.pereplet.ru/images/GRB100302A/GRB_summ.jpg . The message may be cited. mailto: lipunov@sai.msu.ru