TITLE: GCN CIRCULAR NUMBER: 23967 SUBJECT: Fermi trigger 574140965 / GRB190313.15: MASTER Global Robotic Net optical observation DATE: 19/03/15 09:20:01 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, D.Vlasenko, V.Vladimirov, D.Zimnukhov, A.Kuznetsov, P.Balanutsa, A. Chasovnikov, V.Topolev, D.Kuvshinov (Lomonosov Moscow State University, SAI, Physics Department), R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O. Gress, N.M. Budnev, O.Ershova, Yu.Ishmuhametova, S.Yazev (Applied Physics Institute, Irkutsk State University), V. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev (Blagoveschensk Educational State University), A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), R. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico Felix Aguilar OAFA, San Juan National University), H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE, SJNU) MASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, v. 2010, 30L) automatically pointed to Fermi GBM trigger 574140965 (https://gcn.gsfc.nasa.gov/other/574140965.fermi ) error box (RA,Dec(2000) = 05h 31m 52.0s , -35d 06m 00.0s, 1-sigma e.b.=7.8167 deg.) MASTER-SAAO (located in South African Astronomical Observatory) automatically started Fermi trigger 574140965 observations 50499s after notice time (50607 sec after trigger time) at 2019-03-13 17:39:27 UT Observations started at the altitude 78 deg. Sun_Altitude: -9 deg. (twilight) The moon (43 % bright part) altitude was 34 deg. The distance between moon and er.b. was 55 MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU SAI Crimea astronomical station) automatically started inpsect of the FERMI GRB190313.15 error-box 47773s after notice time (47880s after trigger time) at 2019-03-13 16:54:00 UT. The observations started at 19 deg. altitude. The sun altitude was -13.0 deg. The moon altitude was 56 deg. The distance between moon and er.b. was 55deg. MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) automatically started inspect of he FERMI GRB190313.15 error-box 59495 sec after notice time (59603 sec after trigger time) at 2019-03-13 20:09:23 UT. The observations started at 25 deg. altitude. The sun altitude was -13.4 deg. Observations started at twilight. The moon altitude was 68 deg. above the horizon. The distance between moon and er.b. was 55deg MASTER Net cover map is available at http://master.sai.msu.ru/static/GRB190313.15/MASTERFermi574140965GBM.jpg The analysis of automatic reduction will be continued. The message may be cited.