//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24137 SUBJECT: Fermi GRB190420.98 Global MASTER-Net observations report DATE: 19/04/21 01:16:24 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-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 GRB190420.98 ( 21h 17m 09.60s , -66d 24m 36.00s, R=2.04) errorbox 106 sec after trigger time at 2019-04-20 23:34:11 UT, with upper limit up to 16.1 mag. The observations began at zenit distance = 64 deg. The sun altitude is -65.8 deg. MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB190420.98 errorbox 241 sec after trigger time at 2019-04-20 23:36:26 UT, with upper limit up to 15.6 mag. The observations began at zenit distance = 83 deg. The sun altitude is -19.3 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=1000093 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 117 | 2019-04-20 23:34:11 | MASTER-SAAO | ( 21h 15m 02.47s , -66d 17m 01.71s) | C | 20 | 13.1 | 152 | 2019-04-20 23:34:11 | MASTER-SAAO | ( 21h 14m 52.69s , -66d 16m 57.23s) | C | 90 | 13.6 | Coadd 175 | 2019-04-20 23:35:04 | MASTER-SAAO | ( 21h 15m 02.72s , -66d 16m 59.47s) | C | 30 | 13.7 | 175 | 2019-04-20 23:35:04 | MASTER-SAAO | ( 20h 59m 30.81s , -66d 52m 18.70s) | B | 30 | 12.5 | 241 | 2019-04-20 23:36:05 | MASTER-SAAO | ( 21h 15m 02.85s , -66d 16m 57.91s) | C | 40 | 13.9 | 266 | 2019-04-20 23:36:26 | MASTER-OAFA | ( 21h 4m 55.68s , -66d 21m 53.68s) | C | 50 | 14.3 | 321 | 2019-04-20 23:37:16 | MASTER-SAAO | ( 21h 15m 03.08s , -66d 16m 56.04s) | C | 60 | 13.8 | 321 | 2019-04-20 23:37:16 | MASTER-SAAO | ( 20h 59m 31.19s , -66d 52m 16.03s) | B | 60 | 12.5 | 390 | 2019-04-20 23:38:20 | MASTER-OAFA | ( 21h 4m 17.59s , -66d 19m 09.69s) | C | 70 | 13.6 | 422 | 2019-04-20 23:38:46 | MASTER-SAAO | ( 21h 15m 03.37s , -66d 16m 53.96s) | C | 80 | 14.8 | 422 | 2019-04-20 23:38:46 | MASTER-SAAO | ( 20h 59m 31.47s , -66d 52m 14.31s) | B | 80 | 13.6 | 529 | 2019-04-20 23:40:43 | MASTER-SAAO | ( 21h 7m 25.58s , -66d 2m 15.42s) | C | 60 | 14.9 | 529 | 2019-04-20 23:40:43 | MASTER-SAAO | ( 20h 52m 02.65s , -66d 37m 36.33s) | B | 60 | 13.4 | 642 | 2019-04-20 23:42:07 | MASTER-SAAO | ( 21h 25m 56.36s , -66d 27m 22.99s) | C | 120 | 15.3 | 807 | 2019-04-20 23:42:07 | MASTER-SAAO | ( 21h 25m 56.37s , -66d 27m 22.99s) | C | 450 | 15.3 | Coadd 642 | 2019-04-20 23:42:07 | MASTER-SAAO | ( 21h 10m 17.75s , -67d 2m 45.54s) | B | 120 | 13.4 | 659 | 2019-04-20 23:42:23 | MASTER-OAFA | ( 21h 15m 44.66s , -66d 32m 08.29s) | C | 120 | 14.9 | 809 | 2019-04-20 23:44:39 | MASTER-SAAO | ( 21h 25m 56.85s , -66d 27m 19.76s) | C | 150 | 13.4 | 809 | 2019-04-20 23:44:39 | MASTER-SAAO | ( 21h 10m 18.35s , -67d 2m 42.31s) | B | 150 | 13.2 | 864 | 2019-04-20 23:45:28 | MASTER-OAFA | ( 21h 15m 07.74s , -66d 29m 35.40s) | C | 160 | 15.6 | 1006 | 2019-04-20 23:47:40 | MASTER-SAAO | ( 21h 25m 57.19s , -66d 27m 17.28s) | C | 180 | 14.9 | 1006 | 2019-04-20 23:47:40 | MASTER-SAAO | ( 21h 10m 18.62s , -67d 2m 40.24s) | B | 180 | 13.2 | 1098 | 2019-04-20 23:49:13 | MASTER-OAFA | ( 21h 15m 45.77s , -66d 32m 14.82s) | C | 180 | 14.3 | 1217 | 2019-04-20 23:51:11 | MASTER-SAAO | ( 21h 10m 19.24s , -67d 2m 36.66s) | B | 180 | 13.2 | 1217 | 2019-04-20 23:51:11 | MASTER-SAAO | ( 21h 25m 57.83s , -66d 27m 13.42s) | C | 180 | 14.0 | 1344 | 2019-04-20 23:53:18 | MASTER-OAFA | ( 21h 15m 07.72s , -66d 29m 34.47s) | C | 180 | 14.2 | 1372 | 2019-04-20 23:54:47 | MASTER-SAAO | ( 21h 30m 47.16s , -68d 2m 39.19s) | C | 60 | 14.0 | 1372 | 2019-04-20 23:54:47 | MASTER-SAAO | ( 21h 14m 03.34s , -68d 38m 04.95s) | B | 60 | 12.2 | 1468 | 2019-04-20 23:56:23 | MASTER-SAAO | ( 21h 7m 29.61s , -66d 1m 42.57s) | C | 60 | 13.9 | 1564 | 2019-04-20 23:57:59 | MASTER-SAAO | ( 21h 25m 31.67s , -64d 2m 18.10s) | C | 60 | 12.9 | 1660 | 2019-04-20 23:59:35 | MASTER-SAAO | ( 21h 46m 51.68s , -66d 3m 10.84s) | C | 60 | 12.7 | 1756 | 2019-04-21 00:01:11 | MASTER-SAAO | ( 21h 30m 48.50s , -68d 2m 32.64s) | C | 60 | 14.1 | 1756 | 2019-04-21 00:01:11 | MASTER-SAAO | ( 21h 14m 04.41s , -68d 37m 58.98s) | B | 60 | 12.8 | 1855 | 2019-04-21 00:02:49 | MASTER-SAAO | ( 20h 48m 04.60s , -68d 0m 55.44s) | C | 60 | 15.9 | 1949 | 2019-04-21 00:04:23 | MASTER-SAAO | ( 20h 48m 03.84s , -68d 0m 55.17s) | C | 60 | 16.1 | 2046 | 2019-04-21 00:06:01 | MASTER-SAAO | ( 21h 25m 33.19s , -64d 2m 32.87s) | C | 60 | 15.5 | 2046 | 2019-04-21 00:06:01 | MASTER-SAAO | ( 21h 11m 16.33s , -64d 37m 45.55s) | B | 60 | 14.1 | 2143 | 2019-04-21 00:07:38 | MASTER-SAAO | ( 21h 46m 54.42s , -66d 3m 04.20s) | C | 60 | 15.6 | 2143 | 2019-04-21 00:07:38 | MASTER-SAAO | ( 21h 31m 29.98s , -66d 38m 24.72s) | B | 60 | 13.7 | 2273 | 2019-04-21 00:09:47 | MASTER-OAFA | ( 21h 12m 38.43s , -70d 4m 57.01s) | C | 60 | 13.8 | 2337 | 2019-04-21 00:10:51 | MASTER-SAAO | ( 20h 49m 03.33s , -64d 1m 04.84s) | C | 60 | 14.4 | 2696 | 2019-04-21 00:16:51 | MASTER-OAFA | ( 21h 13m 17.47s , -70d 7m 04.03s) | C | 60 | 14.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.