TITLE: GCN CIRCULAR NUMBER: 32503 SUBJECT: Fermi trigger No 683537972: Global MASTER-Net observations report DATE: 22/08/30 20:30:25 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-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 GRB220830.32 (trigger No 683537972,15h 59m 04.80s , -64d 21m 00.0s, R=1.15) errorbox 30475 sec after notice time and 36883 sec after trigger time at 2022-08-30 17:54:11 UT, with upper limit up to 15.6 mag. The observations began at zenith distance = 39 deg. The sun altitude is -20.5 deg.

The galactic latitude b = -9 deg., longitude l = 322 deg.

Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2071750

We obtain a following upper limits.

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

36914 | 2022-08-30 17:54:11 | MASTER-SAAO | (15h 33m 22.17s , -65d 13m 16.5s) | C | 60 | 15.1 | 37005 | 2022-08-30 17:55:41 | MASTER-SAAO | (15h 52m 22.38s , -65d 15m 22.1s) | C | 60 | 14.9 | 37089 | 2022-08-30 17:57:06 | MASTER-SAAO | (16h 09m 25.41s , -65d 15m 39.5s) | C | 60 | 15.5 | 37277 | 2022-08-30 18:00:14 | MASTER-SAAO | (16h 12m 29.28s , -63d 22m 49.3s) | C | 60 | 15.2 | 37586 | 2022-08-30 18:05:22 | MASTER-SAAO | (16h 01m 18.75s , -61d 26m 07.0s) | C | 60 | 14.9 | 37697 | 2022-08-30 18:07:14 | MASTER-SAAO | (15h 38m 49.17s , -63d 19m 47.8s) | C | 60 | 14.7 | 37809 | 2022-08-30 18:09:06 | MASTER-SAAO | (15h 56m 34.36s , -63d 19m 41.9s) | C | 60 | 15.1 | 37902 | 2022-08-30 18:10:39 | MASTER-SAAO | (15h 33m 26.76s , -65d 13m 22.5s) | C | 60 | 15.3 | 37995 | 2022-08-30 18:12:12 | MASTER-SAAO | (15h 52m 22.87s , -65d 15m 20.0s) | C | 60 | 15.1 | 38091 | 2022-08-30 18:13:48 | MASTER-SAAO | (16h 09m 35.70s , -65d 16m 09.9s) | C | 60 | 15.6 | 38315 | 2022-08-30 18:17:32 | MASTER-SAAO | (16h 12m 38.25s , -63d 22m 07.6s) | C | 60 | 15.3 | 40276 | 2022-08-30 18:50:13 | MASTER-SAAO | (16h 01m 23.55s , -61d 24m 50.4s) | C | 60 | 12.9 | 40369 | 2022-08-30 18:51:45 | MASTER-SAAO | (15h 39m 02.46s , -63d 18m 31.7s) | C | 60 | 13.5 | 40478 | 2022-08-30 18:53:35 | MASTER-SAAO | (15h 56m 42.56s , -63d 20m 27.1s) | C | 60 | 13.3 | 40558 | 2022-08-30 18:54:55 | MASTER-SAAO | (15h 33m 31.53s , -65d 12m 39.9s) | C | 60 | 13.6 | 40649 | 2022-08-30 18:56:25 | MASTER-SAAO | (15h 52m 32.24s , -65d 12m 05.0s) | C | 60 | 13.5 | 40763 | 2022-08-30 18:58:20 | MASTER-SAAO | (16h 09m 41.60s , -65d 14m 38.1s) | C | 60 | 14.4 | 41005 | 2022-08-30 19:02:21 | MASTER-SAAO | (16h 12m 45.09s , -63d 20m 07.9s) | C | 60 | 13.8 | 42064 | 2022-08-30 19:20:01 | MASTER-SAAO | (16h 01m 26.47s , -61d 23m 59.5s) | C | 60 | 13.6 | 42484 | 2022-08-30 19:27:01 | MASTER-SAAO | (15h 48m 47.43s , -67d 05m 09.0s) | C | 60 | 13.1 | 42575 | 2022-08-30 19:28:32 | MASTER-SAAO | (16h 07m 22.13s , -67d 06m 19.0s) | C | 60 | 13.6 | 46012 | 2022-08-30 20:25:49 | MASTER-SAAO | (15h 48m 50.47s , -67d 04m 13.5s) | C | 60 | 14.2 | Filter C is a clear (unfiltred) band.

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