TITLE: GCN CIRCULAR NUMBER: 24881 SUBJECT: Fermi trigger No 583111521 Global MASTER-Net observations report DATE: 19/06/25 17:32:24 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 GRB190624.98 (trigger No 583111521, 9h 34m 48.00s , - 4d 24m 00.00s, R=28.35) errorbox 61771 sec after trigger time at 2019-06-25 16:34:47 UT, with upper limit up to 18.8 mag. Observations started at twilight. The observations began at zenit distance = 45 deg. The sun altitude is -10.8 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=1056403 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 61862 | 2019-06-25 16:34:47 | MASTER-SAAO | ( 8h 35m 28.00s , - 3d 59m 09.06s) | V | 180 | 17.3 | 62042 | 2019-06-25 16:34:47 | MASTER-SAAO | ( 8h 35m 28.00s , - 3d 59m 09.07s) | V | 540 | 18.4 | Coadd 62073 | 2019-06-25 16:38:19 | MASTER-SAAO | ( 8h 35m 27.80s , - 3d 58m 53.42s) | C | 180 | 18.0 | 62231 | 2019-06-25 16:41:56 | MASTER-SAAO | ( 9h 37m 16.12s , + 8d 8m 36.67s) | C | 60 | 17.7 | 62327 | 2019-06-25 16:43:33 | MASTER-SAAO | ( 9h 44m 24.29s , +12d 9m 06.10s) | C | 60 | 18.0 | 62423 | 2019-06-25 16:45:09 | MASTER-SAAO | ( 9h 53m 25.43s , + 8d 9m 14.36s) | C | 60 | 18.4 | 62517 | 2019-06-25 16:46:42 | MASTER-SAAO | ( 9h 56m 43.16s , +10d 9m 36.70s) | C | 60 | 18.3 | 62612 | 2019-06-25 16:48:18 | MASTER-SAAO | ( 9h 37m 16.04s , + 8d 8m 47.91s) | C | 60 | 18.2 | 62706 | 2019-06-25 16:49:51 | MASTER-SAAO | ( 9h 45m 20.87s , + 8d 8m 46.97s) | C | 60 | 18.2 | 62862 | 2019-06-25 16:51:28 | MASTER-SAAO | ( 8h 35m 27.56s , - 3d 59m 30.76s) | V | 180 | 18.3 | 63074 | 2019-06-25 16:54:59 | MASTER-SAAO | ( 8h 35m 27.45s , - 3d 59m 18.56s) | C | 180 | 18.8 | 63232 | 2019-06-25 16:58:38 | MASTER-SAAO | ( 9h 44m 23.00s , +12d 8m 42.93s) | C | 60 | 18.5 | 63326 | 2019-06-25 17:00:12 | MASTER-SAAO | ( 9h 52m 33.67s , +12d 8m 41.66s) | C | 60 | 18.7 | 63421 | 2019-06-25 17:01:47 | MASTER-SAAO | ( 9h 53m 26.76s , + 8d 8m 48.75s) | C | 60 | 18.7 | 63520 | 2019-06-25 17:03:25 | MASTER-SAAO | ( 10h 1m 31.52s , + 8d 9m 26.27s) | C | 60 | 18.6 | 63615 | 2019-06-25 17:05:01 | MASTER-SAAO | ( 9h 56m 41.92s , +10d 9m 07.71s) | C | 60 | 18.0 | 63709 | 2019-06-25 17:06:34 | MASTER-SAAO | ( 10h 4m 49.06s , +10d 9m 05.65s) | C | 60 | 18.8 | 63805 | 2019-06-25 17:08:10 | MASTER-SAAO | ( 9h 37m 17.39s , + 8d 7m 55.91s) | C | 60 | 18.5 | 63898 | 2019-06-25 17:09:44 | MASTER-SAAO | ( 9h 45m 22.23s , + 8d 8m 34.22s) | C | 60 | 18.4 | 63993 | 2019-06-25 17:11:19 | MASTER-SAAO | ( 9h 44m 23.03s , +12d 8m 22.41s) | C | 60 | 18.6 | 64087 | 2019-06-25 17:12:53 | MASTER-SAAO | ( 9h 52m 33.71s , +12d 8m 20.65s) | C | 60 | 18.7 | 64182 | 2019-06-25 17:14:28 | MASTER-SAAO | ( 9h 53m 26.78s , + 8d 8m 26.88s) | C | 60 | 18.7 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.