TITLE: GCN CIRCULAR NUMBER: 18385 SUBJECT: R: GRB 151001B: MASTER-NET early optical observations. DATE: 15/10/02 19:05:35 GMT FROM: Remo Rufinni at ICRA Prof. Remo Ruffini Director of ICRANet Piazza della Repubblica 10 65122 Pescara (PE) Italy mobile: +39 339 4752566 Tel. Rome +39 06 49914304 Tel. Pescara +39 085 23054201 Fax: +39 085 4219252 e-mail: ruffini@icra.it ________________________________________ Da: GCN Circulars [gcncirc@capella2.gsfc.nasa.gov] Inviato: venerd? 2 ottobre 2015 11.31 A: Remo Ruffini - Icra Oggetto: GRB 151001B: MASTER-NET early optical observations. TITLE: GCN CIRCULAR NUMBER: 18380 SUBJECT: GRB 151001B: MASTER-NET early optical observations. DATE: 15/10/02 09:22:48 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk E. Gorbovskoy, V. Lipunov, M.Pruzhinskaya, V.Kornilov, D.Kuvshinov, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, D.Denisenko, A.Sankovich Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB151001B 20 sec after notice time and 96 sec after trigger time at 2015-10-01 18:31:13 UT. On our first (20s exposure) set we haven`t found optical transient within SWIFT error-box (Krimm et. al GCN 18374). The 5-sigma upper limit has been about 18.0 mag The message may be cited.