TITLE: GCN CIRCULAR NUMBER: 24975 SUBJECT: Fermi trigger No 583854113 Global MASTER-Net observations report DATE: 19/07/03 17:17:31 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias) D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB190703.57 (trigger No 583854113, 15h 1m 40.08s , +33d 49m 01.20s, R=50) errorbox 10752 sec after trigger time at 2019-07-03 16:41:00 UT, with upper limit up to 19.0 mag. Observations started at twilight. The observations began at zenit distance = 73 deg. The sun altitude is -11.5 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1064231 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 10783 | 2019-07-03 16:41:00 | MASTER-SAAO | ( 12h 28m 50.60s , + 2d 16m 44.30s) | V | 60 | 17.9 | 10843 | 2019-07-03 16:41:00 | MASTER-SAAO | ( 12h 28m 50.61s , + 2d 16m 44.30s) | V | 180 | 18.7 | Coadd 10873 | 2019-07-03 16:42:31 | MASTER-SAAO | ( 12h 28m 49.18s , + 2d 16m 44.37s) | V | 60 | 18.0 | 10963 | 2019-07-03 16:44:01 | MASTER-SAAO | ( 12h 28m 49.23s , + 2d 16m 23.52s) | V | 60 | 18.0 | 11116 | 2019-07-03 16:45:34 | MASTER-SAAO | ( 12h 28m 50.69s , + 2d 16m 22.37s) | V | 180 | 19.0 | Coadd The observation and reduction will continue. The message may be cited.