TITLE: GCN CIRCULAR NUMBER: 18007 SUBJECT: MASTER OT Detection during Fermi Trigger 458235025 inspection DATE: 15/07/10 20:00:46 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs N.Tyurina, E. Gorbovskoy, V. Lipunov, V.Kornilov, P.Balanutsa,A.Kuznetsov, E.Popova, D. Kuvshinov, Lomonosov Moscow State University, Sternberg Astronomical Institute K.Ivanov, O.Gres, N.M.Budnev, S.Yazev, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory Rafael Rebolo, Miquel Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov, A.Gabovich Blagoveschensk Educational State University, Blagoveschensk V.Krushinski, I.Zalozhnih Ural Federal University, Kourovka 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) MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka was pointed to the GRB150710.65 130 sec after notice time and 3592 sec after trigger time at 2015-07-10 16:30:13 UT. On our first (180s exposure) set we found OT MASTER J071803.26+644745.0 within FERMI error-box (ra=08 55 31 dec=+48 54 00 r=11.670000). The OT unfiltered magnitude is 14.5m (limit 17.2m). Coordinates OT source (RA, Dec) = 07h 18m 03.26s +64d 47m 45.0s on 2015-07-10.74346 UT. This OT is identical to USNO-B1 star with B2=17.93, R2=17.97, I=17.66; also is a GALEX source (18.863) and a source from SDSS DR10 catalogue of candidate quasars (Brescia+, 2015) . Previous outburst was detected as ASASSN-15bq and classified like UG The message may be cited.