TITLE: GCN CIRCULAR NUMBER: 25260 SUBJECT: Fermi trigger No 586574612 Global MASTER-Net observations report DATE: 19/08/04 03:31:08 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 GRB190804.06 (trigger No 586574612, 6h 52m 50.40s , -26d 58m 48.00s, R=5.68) errorbox 3811 sec after trigger time at 2019-08-04 02:26:58 UT, with upper limit up to 18.8 mag. The observations began at zenit distance = 73 deg. The sun altitude is -38.1 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=1095608 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 3842 | 2019-08-04 02:26:58 | MASTER-SAAO | ( 6h 25m 15.97s , -27d 56m 56.20s) | C | 60 | 18.6 | 4137 | 2019-08-04 02:31:54 | MASTER-SAAO | ( 6h 34m 19.46s , -27d 56m 45.26s) | C | 60 | 18.4 | 4236 | 2019-08-04 02:33:33 | MASTER-SAAO | ( 6h 25m 16.35s , -27d 57m 11.58s) | C | 60 | 18.8 | 4536 | 2019-08-04 02:38:33 | MASTER-SAAO | ( 6h 34m 19.72s , -27d 57m 00.21s) | C | 60 | 18.5 | 4789 | 2019-08-04 02:42:45 | MASTER-SAAO | ( 6h 43m 24.42s , -27d 56m 29.10s) | C | 60 | 18.3 | 4888 | 2019-08-04 02:44:25 | MASTER-SAAO | ( 6h 42m 02.29s , -29d 56m 28.82s) | C | 60 | 18.2 | 5085 | 2019-08-04 02:47:42 | MASTER-SAAO | ( 6h 43m 24.62s , -27d 56m 45.80s) | C | 60 | 18.4 | 5184 | 2019-08-04 02:49:20 | MASTER-SAAO | ( 6h 45m 09.76s , -25d 56m 22.68s) | C | 60 | 18.4 | 5283 | 2019-08-04 02:51:00 | MASTER-SAAO | ( 6h 52m 27.73s , -27d 56m 34.87s) | C | 60 | 18.3 | 5381 | 2019-08-04 02:52:37 | MASTER-SAAO | ( 6h 51m 17.85s , -29d 56m 13.96s) | C | 60 | 18.3 | 5479 | 2019-08-04 02:54:16 | MASTER-SAAO | ( 6h 38m 37.10s , -23d 56m 43.26s) | C | 60 | 18.5 | 5578 | 2019-08-04 02:55:54 | MASTER-SAAO | ( 6h 45m 11.29s , -25d 56m 36.08s) | C | 60 | 18.5 | 5675 | 2019-08-04 02:57:32 | MASTER-SAAO | ( 6h 54m 05.11s , -25d 56m 07.20s) | C | 60 | 18.1 | 5773 | 2019-08-04 02:59:10 | MASTER-SAAO | ( 6h 52m 26.68s , -27d 56m 07.23s) | C | 60 | 18.2 | 5871 | 2019-08-04 03:00:47 | MASTER-SAAO | ( 7h 1m 30.07s , -27d 56m 18.56s) | C | 60 | 17.9 | 5976 | 2019-08-04 03:02:32 | MASTER-SAAO | ( 6h 38m 38.84s , -23d 56m 38.16s) | C | 60 | 18.5 | 6074 | 2019-08-04 03:04:11 | MASTER-SAAO | ( 6h 47m 23.94s , -23d 56m 09.28s) | C | 60 | 18.3 | 6172 | 2019-08-04 03:05:49 | MASTER-SAAO | ( 6h 54m 04.23s , -25d 56m 02.45s) | C | 60 | 18.3 | 6371 | 2019-08-04 03:09:07 | MASTER-SAAO | ( 7h 2m 59.29s , -25d 55m 52.16s) | C | 60 | 18.2 | 6568 | 2019-08-04 03:12:25 | MASTER-SAAO | ( 6h 56m 09.31s , -23d 56m 15.64s) | C | 60 | 18.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.