TITLE: GCN CIRCULAR NUMBER: 24781 SUBJECT: Fermi trigger No 581889628 Global MASTER-Net observations report DATE: 19/06/10 21:31:11 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 GRB190610.83 (trigger No 581889628, 20h 59m 19.20s , -15d 55m 48.00s, R=11.23) errorbox 1363 sec after trigger time at 2019-06-10 20:23:06 UT, with upper limit up to 18.3 mag. The observations began at zenit distance = 82 deg. The sun altitude is -58.8 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=1044830 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 1393 | 2019-06-10 20:23:06 | MASTER-SAAO | ( 20h 23m 47.02s , -18d 1m 41.23s) | C | 60 | 17.6 | 1625 | 2019-06-10 20:26:58 | MASTER-SAAO | ( 20h 21m 31.53s , -20d 1m 31.69s) | C | 60 | 18.1 | 1721 | 2019-06-10 20:28:33 | MASTER-SAAO | ( 20h 23m 47.60s , -18d 1m 31.28s) | C | 60 | 18.0 | 1845 | 2019-06-10 20:30:37 | MASTER-SAAO | ( 20h 32m 11.91s , -18d 1m 24.77s) | C | 60 | 17.7 | 1943 | 2019-06-10 20:32:15 | MASTER-SAAO | ( 20h 21m 31.84s , -20d 1m 01.74s) | C | 60 | 18.3 | 2040 | 2019-06-10 20:33:52 | MASTER-SAAO | ( 20h 30m 02.25s , -20d 1m 37.21s) | C | 60 | 18.1 | 2137 | 2019-06-10 20:35:29 | MASTER-SAAO | ( 20h 32m 12.17s , -18d 1m 39.51s) | C | 60 | 17.9 | 2234 | 2019-06-10 20:37:07 | MASTER-SAAO | ( 20h 38m 33.48s , -20d 1m 31.09s) | C | 60 | 18.0 | 2333 | 2019-06-10 20:38:46 | MASTER-SAAO | ( 20h 40m 36.96s , -18d 1m 53.36s) | C | 60 | 17.7 | 2442 | 2019-06-10 20:40:34 | MASTER-SAAO | ( 20h 30m 04.07s , -20d 1m 11.43s) | C | 60 | 18.2 | 2980 | 2019-06-10 20:49:32 | MASTER-SAAO | ( 20h 39m 00.46s , -20d 1m 46.36s) | C | 60 | 18.3 | 3077 | 2019-06-10 20:51:09 | MASTER-SAAO | ( 20h 47m 04.70s , -20d 1m 39.43s) | C | 60 | 18.2 | 3174 | 2019-06-10 20:52:47 | MASTER-SAAO | ( 20h 40m 35.31s , -18d 1m 24.28s) | C | 60 | 18.3 | 3268 | 2019-06-10 20:54:21 | MASTER-SAAO | ( 20h 48m 59.64s , -18d 1m 58.87s) | C | 60 | 18.1 | 3366 | 2019-06-10 20:55:58 | MASTER-SAAO | ( 20h 57m 25.80s , -18d 1m 52.73s) | C | 60 | 17.8 | 3462 | 2019-06-10 20:57:35 | MASTER-SAAO | ( 20h 47m 03.73s , -20d 1m 32.52s) | C | 60 | 18.3 | 3560 | 2019-06-10 20:59:13 | MASTER-SAAO | ( 20h 55m 35.96s , -20d 2m 07.79s) | C | 60 | 18.2 | 3657 | 2019-06-10 21:00:49 | MASTER-SAAO | ( 20h 49m 01.50s , -18d 1m 33.33s) | C | 60 | 18.2 | 3758 | 2019-06-10 21:02:31 | MASTER-SAAO | ( 20h 57m 24.72s , -18d 1m 47.82s) | C | 60 | 18.0 | 3855 | 2019-06-10 21:04:08 | MASTER-SAAO | ( 21h 5m 49.42s , -18d 2m 22.23s) | C | 60 | 17.9 | 3954 | 2019-06-10 21:05:47 | MASTER-SAAO | ( 20h 55m 36.34s , -20d 2m 02.53s) | C | 60 | 18.2 | 4050 | 2019-06-10 21:07:23 | MASTER-SAAO | ( 21h 4m 07.13s , -20d 1m 57.09s) | C | 60 | 18.1 | 4149 | 2019-06-10 21:09:02 | MASTER-SAAO | ( 21h 0m 43.56s , -16d 2m 08.69s) | C | 60 | 17.8 | 4247 | 2019-06-10 21:10:39 | MASTER-SAAO | ( 21h 5m 50.80s , -18d 2m 17.14s) | C | 60 | 18.1 | 4346 | 2019-06-10 21:12:19 | MASTER-SAAO | ( 21h 5m 29.62s , -14d 1m 54.00s) | C | 60 | 17.6 | 4639 | 2019-06-10 21:17:12 | MASTER-SAAO | ( 21h 9m 04.51s , -16d 1m 57.71s) | C | 60 | 17.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.