TITLE: GCN CIRCULAR NUMBER: 24588 SUBJECT: Fermi GRB190517.81 Global MASTER-Net observations report DATE: 19/05/17 20:31:33 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D. Vlasenko (Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University) A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory) K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk (Irkutsk State University) V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University, Blagoveschensk) R. Podesta, Carlos Lopez and F. Podesta (Observatorio Astronomico Felix Aguilar (OAFA)) Hugo Levato and Carlos Saffe (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)) R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias) D. Buckley, S. Potter, A. Kniazev, M. Kotze (South African Astronomical Observatory) MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB190517.81 (trigger No 579814215, 17h 59m 24.00s , +25d 54m 36.00s, R=1) errorbox 92 sec after trigger time at 2019-05-17 19:31:42 UT, with upper limit up to 17.7 mag. The observations began at zenit distance = 51 deg. The sun altitude is -23.9 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB190517.81 errorbox 135 sec after trigger time at 2019-05-17 19:32:25 UT, with upper limit up to 15.6 mag. The observations began at zenit distance = 57 deg. The sun altitude is -20.3 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=1021627 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 103 | 2019-05-17 19:31:42 | MASTER-Kislovodsk | ( 18h 2m 43.40s , +25d 11m 59.91s) | P- | 20 | 16.9 | 103 | 2019-05-17 19:31:42 | MASTER-Kislovodsk | ( 18h 2m 48.18s , +24d 44m 08.57s) | P| | 20 | 16.9 | 150 | 2019-05-17 19:32:25 | MASTER-Tavrida | ( 18h 0m 02.12s , +25d 53m 17.83s) | C | 30 | 14.4 | 150 | 2019-05-17 19:32:25 | MASTER-Tavrida | ( 17h 58m 58.93s , +25d 50m 33.56s) | C | 30 | 13.9 | 152 | 2019-05-17 19:32:26 | MASTER-Kislovodsk | ( 18h 2m 43.30s , +25d 12m 01.57s) | P- | 30 | 17.1 | 152 | 2019-05-17 19:32:27 | MASTER-Kislovodsk | ( 18h 2m 48.24s , +24d 44m 11.09s) | P| | 30 | 17.1 | 211 | 2019-05-17 19:33:20 | MASTER-Kislovodsk | ( 18h 2m 43.24s , +25d 12m 03.50s) | P- | 40 | 17.3 | 211 | 2019-05-17 19:33:20 | MASTER-Kislovodsk | ( 18h 2m 48.32s , +24d 44m 13.49s) | P| | 40 | 17.3 | 213 | 2019-05-17 19:33:23 | MASTER-Tavrida | ( 18h 0m 02.16s , +25d 53m 18.31s) | C | 40 | 15.5 | 213 | 2019-05-17 19:33:23 | MASTER-Tavrida | ( 17h 58m 58.94s , +25d 50m 33.91s) | C | 40 | 15.1 | 283 | 2019-05-17 19:33:23 | MASTER-Tavrida | ( 17h 58m 58.94s , +25d 50m 33.97s) | C | 180 | 14.3 | Coadd 280 | 2019-05-17 19:34:24 | MASTER-Kislovodsk | ( 18h 2m 43.17s , +25d 12m 05.69s) | P- | 50 | 17.4 | 280 | 2019-05-17 19:34:24 | MASTER-Kislovodsk | ( 18h 2m 48.39s , +24d 44m 16.24s) | P| | 50 | 17.3 | 284 | 2019-05-17 19:34:29 | MASTER-Tavrida | ( 18h 0m 02.21s , +25d 53m 18.51s) | C | 50 | 13.4 | 284 | 2019-05-17 19:34:29 | MASTER-Tavrida | ( 17h 58m 58.94s , +25d 50m 33.93s) | C | 50 | 13.7 | 363 | 2019-05-17 19:35:38 | MASTER-Kislovodsk | ( 18h 2m 43.06s , +25d 12m 08.17s) | P- | 70 | 17.6 | 364 | 2019-05-17 19:35:38 | MASTER-Kislovodsk | ( 18h 2m 48.48s , +24d 44m 19.26s) | P| | 70 | 17.5 | 463 | 2019-05-17 19:37:12 | MASTER-Kislovodsk | ( 18h 2m 42.91s , +25d 12m 10.49s) | P- | 80 | 17.6 | 463 | 2019-05-17 19:37:12 | MASTER-Kislovodsk | ( 18h 2m 48.56s , +24d 44m 22.06s) | P| | 80 | 17.7 | 476 | 2019-05-17 19:37:21 | MASTER-Tavrida | ( 17h 58m 58.90s , +25d 50m 35.44s) | C | 90 | 14.6 | 477 | 2019-05-17 19:37:21 | MASTER-Tavrida | ( 18h 0m 02.16s , +25d 53m 19.88s) | C | 90 | 14.6 | 632 | 2019-05-17 19:37:21 | MASTER-Tavrida | ( 18h 0m 02.16s , +25d 53m 19.99s) | C | 400 | 15.2 | Coadd 603 | 2019-05-17 19:39:17 | MASTER-Tavrida | ( 17h 58m 58.90s , +25d 50m 36.01s) | C | 110 | 13.7 | 758 | 2019-05-17 19:39:17 | MASTER-Tavrida | ( 17h 58m 58.90s , +25d 50m 35.99s) | C | 420 | 15.1 | Coadd 755 | 2019-05-17 19:41:34 | MASTER-Tavrida | ( 18h 0m 02.13s , +25d 53m 20.83s) | C | 140 | 15.6 | 755 | 2019-05-17 19:41:35 | MASTER-Tavrida | ( 17h 58m 58.92s , +25d 50m 36.19s) | C | 140 | 15.5 | 936 | 2019-05-17 19:44:21 | MASTER-Tavrida | ( 17h 58m 58.94s , +25d 50m 36.49s) | C | 170 | 14.2 | 936 | 2019-05-17 19:44:21 | MASTER-Tavrida | ( 18h 0m 02.15s , +25d 53m 20.87s) | C | 170 | 14.0 | 1138 | 2019-05-17 19:47:38 | MASTER-Tavrida | ( 17h 58m 58.89s , +25d 50m 37.68s) | C | 180 | 14.3 | 1318 | 2019-05-17 19:47:38 | MASTER-Tavrida | ( 17h 58m 58.89s , +25d 50m 37.75s) | C | 540 | 14.7 | Coadd 1138 | 2019-05-17 19:47:38 | MASTER-Tavrida | ( 18h 0m 01.98s , +25d 53m 21.87s) | C | 180 | 14.6 | 1346 | 2019-05-17 19:51:05 | MASTER-Tavrida | ( 18h 0m 01.91s , +25d 53m 22.58s) | C | 180 | 14.5 | 1346 | 2019-05-17 19:51:06 | MASTER-Tavrida | ( 17h 58m 58.90s , +25d 50m 38.31s) | C | 180 | 14.2 | 1552 | 2019-05-17 19:54:32 | MASTER-Tavrida | ( 18h 0m 01.79s , +25d 53m 23.69s) | C | 180 | 14.6 | 1552 | 2019-05-17 19:54:32 | MASTER-Tavrida | ( 17h 58m 58.90s , +25d 50m 39.55s) | C | 180 | 14.6 | 1760 | 2019-05-17 19:57:59 | MASTER-Tavrida | ( 18h 0m 01.71s , +25d 53m 24.03s) | C | 180 | 14.6 | 1760 | 2019-05-17 19:57:59 | MASTER-Tavrida | ( 17h 58m 58.89s , +25d 50m 39.97s) | C | 180 | 14.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.