TITLE: GCN CIRCULAR NUMBER: 25446 SUBJECT: Fermi GBM-190816: MASTER-Net optical observation report DATE: 19/08/22 11:27:39 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, F.Balakin, E. Gorbovskoy, V. Kornilov, N.Tyurina, P.Balanutsa,A.Kuznetsov, F.Balakin, V. Vladimirov, D. Vlasenko, I. Gorbunov,D.Zimnukhov, V.Senik, A.Chasovnikov, A.Pozdnyakov, A.Chasovnikov, V.Topolev, D.Kuvshinov(Lomonosov Moscow State University, SAI, Physics Department), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias IAC), 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), D. Buckley (South African Astronomical Observatory SAAO), O. Gress, 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 Global Robotic Net ( http://observ.pereplet.ru, Lipunov et al.,2010,Advances in Astronomy, vol. 2010, 30L) started Fermi GBM-190816 (LIGO/Fermi-GBM GCN 25406) inspect 73 sec after trigger time at 2019-08-16 21:23:26 UT . MASTER-IAC robotic telescope, located in Spain (IAC Teide Observatory) started inspect of Fermi GBM-190816 errorbox 73 sec after trigger time at 2019-08-16 21:23:26 UT,with upper limit up to 19.7 mag. The observations began at zenit distance = 49 deg. The sun altitude is -21.7 deg. MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of Fermi GBM-190816 errorbox 5470 sec after trigger time at 2019-08-16 22:53:23 UT, with upper limit up to 18.4 mag. Observations started at twilight. The observations began at zenit distance = 49 deg. The sun altitude is -10.0 deg. MASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) started inspect of Fermi GBM-190816 errorbox 9193 sec after trigger time at 2019-08-16 23:55:26 UT,with upper limit up to 19.4 mag. The observations began at zenit distance = 60 deg. The sun altitude is -65.3 deg. MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of Fermi GBM-190816 errorbox 11053 sec after trigger time at 2019-08-17 00:26:26 UT, with upper limit up to 19.0 mag. The observations began at zenit distance = 60 deg. The sun altitude is -18.4 deg. MASTER-Tunka robotic telescope located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GBM-190816 errorbox 58429 sec after trigger time at 2019-08-17 13:36:02 UT, with upper limit up to 18.7 mag. Observations started at twilight. The observations began at zenit distance = 53 deg. The sun altitude is -10.4 deg. MASTER-Amur robotic telescope located in Russia (BSPU) started inspect of Fermi GBM-190816 errorbox 1 days 57077 sec after trigger time at 2019-08-18 13:13:30 UT, with upper limit up to 18.3 mag. The observations began at zenit distance = 53 deg. The sun altitude is -19.6 deg. MASTER auto-detection system didn't find OT, that could be connected with GRB/GW events (AGN flares, known cataclismic variables found during inspect are excluded from candidates to the counterpart) Reduction and analysis will be continued. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/ligo_1.php?id=10721 We obtain the following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 103 | 2019-08-16 21:23:26 | MASTER-IAC | ( 14h 5m 10.35s , +46d 7m 39.34s) | C | 60 | 17.8 | 104 | 2019-08-16 21:23:26 | MASTER-IAC | ( 14h 17m 00.51s , +46d 3m 24.59s) | C | 60 | 17.7 | 237 | 2019-08-16 21:25:39 | MASTER-IAC | ( 14h 5m 08.91s , +46d 7m 38.46s) | C | 60 | 17.7 | 237 | 2019-08-16 21:25:39 | MASTER-IAC | ( 14h 16m 59.07s , +46d 3m 23.79s) | C | 60 | 17.5 | 374 | 2019-08-16 21:27:57 | MASTER-IAC | ( 13h 36m 03.92s , +44d 7m 27.38s) | C | 60 | 16.8 | 434 | 2019-08-16 21:27:57 | MASTER-IAC | ( 13h 36m 03.92s , +44d 7m 27.37s) | C | 180 | 17.4 | Coadd 379 | 2019-08-16 21:28:01 | MASTER-IAC | ( 13h 47m 29.17s , +44d 3m 16.24s) | C | 60 | 16.9 | 439 | 2019-08-16 21:28:01 | MASTER-IAC | ( 13h 47m 29.17s , +44d 3m 16.18s) | C | 180 | 17.9 | Coadd 505 | 2019-08-16 21:30:08 | MASTER-IAC | ( 13h 36m 05.04s , +44d 7m 25.49s) | C | 60 | 16.6 | 505 | 2019-08-16 21:30:08 | MASTER-IAC | ( 13h 47m 30.28s , +44d 3m 14.84s) | C | 60 | 17.3 | 641 | 2019-08-16 21:32:24 | MASTER-IAC | ( 13h 36m 05.02s , +44d 7m 43.84s) | C | 60 | 16.8 | 642 | 2019-08-16 21:32:24 | MASTER-IAC | ( 13h 47m 30.34s , +44d 3m 33.27s) | C | 60 | 17.5 | 779 | 2019-08-16 21:34:42 | MASTER-IAC | ( 13h 43m 06.20s , +10d 7m 56.62s) | C | 60 | 16.6 | 839 | 2019-08-16 21:34:42 | MASTER-IAC | ( 13h 43m 06.20s , +10d 7m 56.62s) | C | 180 | 17.2 | Coadd 779 | 2019-08-16 21:34:42 | MASTER-IAC | ( 13h 51m 24.48s , +10d 3m 50.81s) | C | 60 | 16.6 | 839 | 2019-08-16 21:34:42 | MASTER-IAC | ( 13h 51m 24.48s , +10d 3m 50.77s) | C | 180 | 17.5 | Coadd 911 | 2019-08-16 21:36:53 | MASTER-IAC | ( 13h 51m 24.47s , +10d 3m 26.97s) | C | 60 | 16.9 | 911 | 2019-08-16 21:36:53 | MASTER-IAC | ( 13h 43m 06.16s , +10d 7m 33.08s) | C | 60 | 16.6 | 1050 | 2019-08-16 21:39:13 | MASTER-IAC | ( 13h 51m 25.89s , +10d 3m 24.47s) | C | 60 | 16.9 | 1050 | 2019-08-16 21:39:13 | MASTER-IAC | ( 13h 43m 07.61s , +10d 7m 30.25s) | C | 60 | 16.4 | 1194 | 2019-08-16 21:41:37 | MASTER-IAC | ( 13h 48m 44.63s , +12d 7m 45.96s) | C | 60 | 16.8 | 1254 | 2019-08-16 21:41:37 | MASTER-IAC | ( 13h 48m 44.62s , +12d 7m 45.93s) | C | 180 | 17.2 | Coadd 1308 | 2019-08-16 21:43:30 | MASTER-IAC | ( 13h 48m 43.18s , +12d 7m 44.31s) | C | 60 | 16.5 | 1308 | 2019-08-16 21:43:30 | MASTER-IAC | ( 13h 57m 04.90s , +12d 3m 37.82s) | C | 60 | 16.7 | 1446 | 2019-08-16 21:45:49 | MASTER-IAC | ( 13h 48m 43.18s , +12d 7m 22.49s) | C | 60 | 16.5 | 1449 | 2019-08-16 21:45:51 | MASTER-IAC | ( 13h 57m 04.95s , +12d 3m 16.28s) | C | 60 | 16.8 | 1583 | 2019-08-16 21:48:06 | MASTER-IAC | ( 14h 3m 53.91s , +14d 3m 11.38s) | C | 60 | 17.0 | 1643 | 2019-08-16 21:48:06 | MASTER-IAC | ( 14h 3m 53.91s , +14d 3m 11.44s) | C | 180 | 17.3 | Coadd 1583 | 2019-08-16 21:48:06 | MASTER-IAC | ( 13h 55m 27.96s , +14d 7m 18.21s) | C | 60 | 16.8 | 1643 | 2019-08-16 21:48:06 | MASTER-IAC | ( 13h 55m 27.96s , +14d 7m 18.13s) | C | 180 | 17.3 | Coadd 1715 | 2019-08-16 21:50:18 | MASTER-IAC | ( 14h 3m 53.89s , +14d 3m 30.30s) | C | 60 | 16.4 | 1715 | 2019-08-16 21:50:18 | MASTER-IAC | ( 13h 55m 27.96s , +14d 7m 37.20s) | C | 60 | 16.5 | 1852 | 2019-08-16 21:52:34 | MASTER-IAC | ( 13h 55m 26.50s , +14d 7m 35.65s) | C | 60 | 16.7 | 1852 | 2019-08-16 21:52:34 | MASTER-IAC | ( 14h 3m 52.46s , +14d 3m 29.14s) | C | 60 | 16.7 | 1989 | 2019-08-16 21:54:52 | MASTER-IAC | ( 13h 42m 05.48s , +46d 6m 59.38s) | C | 60 | 16.3 | 2049 | 2019-08-16 21:54:52 | MASTER-IAC | ( 13h 42m 05.48s , +46d 6m 59.42s) | C | 180 | 17.3 | Coadd 1989 | 2019-08-16 21:54:52 | MASTER-IAC | ( 13h 53m 55.01s , +46d 2m 49.01s) | C | 60 | 16.7 | 2049 | 2019-08-16 21:54:52 | MASTER-IAC | ( 13h 53m 55.02s , +46d 2m 48.95s) | C | 180 | 17.8 | Coadd 2122 | 2019-08-16 21:57:04 | MASTER-IAC | ( 13h 42m 06.87s , +46d 7m 00.29s) | C | 60 | 17.0 | 2122 | 2019-08-16 21:57:05 | MASTER-IAC | ( 13h 53m 56.53s , +46d 2m 50.30s) | C | 60 | 17.3 | 2255 | 2019-08-16 21:59:17 | MASTER-IAC | ( 13h 42m 06.86s , +46d 7m 20.30s) | C | 60 | 17.0 | 2255 | 2019-08-16 21:59:18 | MASTER-IAC | ( 13h 53m 56.63s , +46d 3m 10.34s) | C | 60 | 17.5 | ... the full list of optical limits is https://master.sai.msu.ru/site/master2/ligo_1.php?id=10721