TITLE: GCN CIRCULAR NUMBER: 31807 SUBJECT: Fermi GRB 220330A: Global MASTER-Net observations report DATE: 22/03/30 13:30:29 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs lipunov@xray.sai.msu.ru

V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin (Lomonosov Moscow State University, SAI, Physics Department),

R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA),

R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),

D. Buckley (South African Astronomical Observatory),

O.A. Gres, N.M. Budnev (Irkutsk State University, API),

L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory),

A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),

A. Gabovich, V.Yurkov (Blagoveschensk Educational State University)

MASTER-OAGH robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Mexico (OAGH National Institute for Astrophysics, Optics and Electronics) started inspect of the Fermi GRB 220330A ( Fermi GBM team, GCN 31806) errorbox 37 sec after notice time and 66 sec after trigger time at 2022-03-30 12:29:15 UT, with upper limit up to 17.1 mag. Observations started at twilight. The observations began at zenith distance = 47 deg. The sun altitude is -9.6 deg.

MASTER-Amur robotic telescope located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 220330A errorbox 51 sec after notice time and 80 sec after trigger time at 2022-03-30 12:29:29 UT, with upper limit up to 17.9 mag. The observations began at zenith distance = 67 deg. The sun altitude is -23.1 deg.

The galactic latitude b = 8 deg., longitude l = 103 deg.

Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1927341

We obtain a following upper limits.

Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________

71 | 2022-03-30 12:29:15 | MASTER-OAGH | (21h 20m 30.17s , +62d 49m 52.5s) | C | 10 | 16.9 | 91 | 2022-03-30 12:29:29 | MASTER-Amur | (21h 30m 59.44s , +63d 07m 26.5s) | C | 20 | 16.9 | 107 | 2022-03-30 12:29:46 | MASTER-OAGH | (21h 21m 26.31s , +62d 20m 46.1s) | C | 20 | 17.0 | 107 | 2022-03-30 12:29:46 | MASTER-OAGH | (21h 20m 25.32s , +62d 49m 09.0s) | C | 20 | 17.1 | 130 | 2022-03-30 12:30:09 | MASTER-Amur | (21h 30m 52.87s , +63d 06m 20.1s) | C | 20 | 16.9 | 148 | 2022-03-30 12:30:27 | MASTER-OAGH | (21h 20m 25.46s , +62d 50m 10.3s) | C | 20 | 16.8 | 148 | 2022-03-30 12:30:27 | MASTER-OAGH | (21h 21m 26.38s , +62d 21m 47.1s) | C | 20 | 16.9 | 175 | 2022-03-30 12:30:49 | MASTER-Amur | (21h 30m 58.51s , +63d 06m 22.2s) | C | 30 | 17.2 | 194 | 2022-03-30 12:31:08 | MASTER-OAGH | (21h 20m 30.63s , +62d 49m 11.9s) | C | 30 | 16.8 | 194 | 2022-03-30 12:31:08 | MASTER-OAGH | (21h 21m 31.38s , +62d 20m 48.4s) | C | 30 | 16.8 | 230 | 2022-03-30 12:31:38 | MASTER-Amur | (21h 30m 55.74s , +63d 08m 05.0s) | C | 40 | 17.3 | 250 | 2022-03-30 12:31:59 | MASTER-OAGH | (21h 20m 25.76s , +62d 48m 12.7s) | C | 40 | 16.8 | 250 | 2022-03-30 12:31:59 | MASTER-OAGH | (21h 21m 26.33s , +62d 19m 48.6s) | C | 40 | 16.7 | 294 | 2022-03-30 12:32:38 | MASTER-Amur | (21h 30m 55.02s , +63d 06m 11.5s) | C | 50 | 17.4 | 321 | 2022-03-30 12:33:00 | MASTER-OAGH | (21h 20m 31.69s , +62d 48m 40.7s) | C | 60 | 16.6 | 321 | 2022-03-30 12:33:00 | MASTER-OAGH | (21h 21m 32.12s , +62d 20m 15.8s) | C | 60 | 16.7 | 373 | 2022-03-30 12:33:47 | MASTER-Amur | (21h 30m 57.89s , +63d 07m 45.6s) | C | 70 | 17.5 | 407 | 2022-03-30 12:34:21 | MASTER-OAGH | (21h 20m 28.95s , +62d 50m 12.7s) | C | 70 | 16.5 | 407 | 2022-03-30 12:34:21 | MASTER-OAGH | (21h 21m 29.28s , +62d 21m 47.0s) | C | 70 | 16.5 | 461 | 2022-03-30 12:35:20 | MASTER-Amur | (21h 05m 02.96s , +64d 18m 58.6s) | C | 60 | 17.9 | 494 | 2022-03-30 12:35:52 | MASTER-OAGH | (21h 22m 29.00s , +62d 02m 47.9s) | C | 60 | 16.0 | 494 | 2022-03-30 12:35:52 | MASTER-OAGH | (21h 23m 27.73s , +61d 34m 24.7s) | C | 60 | 16.1 | 541 | 2022-03-30 12:36:40 | MASTER-Amur | (21h 23m 22.59s , +64d 18m 08.6s) | C | 60 | 17.7 | 651 | 2022-03-30 12:38:00 | MASTER-Amur | (21h 42m 47.22s , +63d 23m 04.0s) | C | 120 | 17.6 | 801 | 2022-03-30 12:40:19 | MASTER-Amur | (21h 42m 52.69s , +63d 23m 29.4s) | C | 140 | 17.6 | 980 | 2022-03-30 12:42:59 | MASTER-Amur | (21h 42m 49.87s , +63d 24m 48.3s) | C | 180 | 17.9 | 1180 | 2022-03-30 12:46:18 | MASTER-Amur | (21h 42m 49.23s , +63d 23m 25.5s) | C | 180 | 17.9 | 1319 | 2022-03-30 12:49:38 | MASTER-Amur | (21h 39m 38.66s , +64d 18m 08.5s) | C | 60 | 17.6 | 1614 | 2022-03-30 12:54:33 | MASTER-Amur | (22h 06m 40.37s , +63d 37m 11.9s) | C | 60 | 17.7 | 1695 | 2022-03-30 12:55:54 | MASTER-Amur | (21h 05m 10.51s , +64d 17m 49.2s) | C | 60 | 17.7 | 1775 | 2022-03-30 12:57:14 | MASTER-Amur | (21h 23m 30.29s , +64d 18m 09.6s) | C | 60 | 17.8 | 1855 | 2022-03-30 12:58:33 | MASTER-Amur | (21h 23m 42.97s , +66d 11m 54.8s) | C | 60 | 17.8 | 1934 | 2022-03-30 12:59:53 | MASTER-Amur | (21h 43m 20.23s , +66d 13m 51.1s) | C | 60 | 17.5 | 2019 | 2022-03-30 13:01:18 | MASTER-Amur | (21h 39m 36.72s , +60d 31m 51.9s) | C | 60 | 17.4 | 2098 | 2022-03-30 13:02:37 | MASTER-Amur | (21h 55m 45.97s , +60d 30m 58.6s) | C | 60 | 17.2 | 2186 | 2022-03-30 13:04:05 | MASTER-Amur | (21h 09m 09.99s , +60d 29m 32.5s) | C | 60 | 17.5 | 2266 | 2022-03-30 13:05:25 | MASTER-Amur | (21h 25m 10.42s , +60d 31m 07.0s) | C | 60 | 17.3 | 2345 | 2022-03-30 13:06:44 | MASTER-Amur | (21h 39m 48.03s , +64d 17m 49.7s) | C | 60 | 17.6 | 2425 | 2022-03-30 13:08:04 | MASTER-Amur | (21h 55m 09.06s , +62d 24m 47.8s) | C | 60 | 17.3 | 2710 | 2022-03-30 13:12:48 | MASTER-Amur | (22h 20m 25.56s , +61d 43m 08.3s) | C | 60 | 17.3 | 2791 | 2022-03-30 13:14:10 | MASTER-Amur | (21h 57m 59.57s , +64d 18m 09.6s) | C | 60 | 17.4 | 2871 | 2022-03-30 13:15:30 | MASTER-Amur | (21h 05m 15.11s , +64d 17m 22.6s) | C | 60 | 17.8 | 2951 | 2022-03-30 13:16:50 | MASTER-Amur | (21h 23m 24.84s , +64d 19m 03.6s) | C | 60 | 17.7 | 3031 | 2022-03-30 13:18:10 | MASTER-Amur | (21h 23m 40.35s , +66d 11m 48.7s) | C | 60 | 17.8 | Filter C is a clear (unfiltred) band.

The observation and reduction will continue. The message may be cited.