TITLE: GCN CIRCULAR NUMBER: 31378 SUBJECT: Fermi GRB 220103A: Global MASTER-Net observations report DATE: 22/01/03 21:46:32 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina, A.Chasovnikov, V.Topolev, V.Grinshpun, D.Kuvshinov, D. Cheryasov (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), B.L.Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez, M.L.H.Rodriguez (INAOE, OAGH) A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational State University) MASTER-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 220103A ( Fermi GBM team, GCN 31377) errorbox 30 sec after notice time and 58 sec after trigger time at 2022-01-03 21:04:11 UT, with upper limit up to 18.4 mag. The observations began at zenith distance = 49 deg. The sun altitude is -35.4 deg. The galactic latitude b = -64 deg., longitude l = 191 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1836950 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 63 | 2022-01-03 21:04:11 | MASTER-IAC | (02h 14m 13.48s , -19d 40m 00.4s) | P| | 10 | 16.1 | 83 | 2022-01-03 21:04:11 | MASTER-IAC | (02h 14m 13.48s , -19d 40m 00.4s) | P| | 50 | 17.3 | Coadd 63 | 2022-01-03 21:04:11 | MASTER-IAC | (02h 15m 11.64s , -19d 46m 35.0s) | P- | 10 | 15.7 | 83 | 2022-01-03 21:04:11 | MASTER-IAC | (02h 15m 11.64s , -19d 46m 35.0s) | P- | 50 | 16.9 | Coadd 99 | 2022-01-03 21:04:41 | MASTER-IAC | (02h 14m 19.59s , -19d 39m 44.1s) | P| | 20 | 16.8 | 99 | 2022-01-03 21:04:41 | MASTER-IAC | (02h 15m 17.72s , -19d 46m 18.6s) | P- | 20 | 16.4 | 139 | 2022-01-03 21:05:21 | MASTER-IAC | (02h 14m 17.38s , -19d 38m 13.8s) | P| | 20 | 16.7 | 139 | 2022-01-03 21:05:21 | MASTER-IAC | (02h 15m 15.46s , -19d 44m 48.3s) | P- | 20 | 16.4 | 184 | 2022-01-03 21:06:01 | MASTER-IAC | (02h 14m 17.38s , -19d 39m 33.0s) | P| | 30 | 17.2 | 229 | 2022-01-03 21:06:01 | MASTER-IAC | (02h 14m 17.38s , -19d 39m 33.0s) | P| | 120 | 17.9 | Coadd 184 | 2022-01-03 21:06:01 | MASTER-IAC | (02h 15m 15.43s , -19d 46m 06.7s) | P- | 30 | 16.9 | 229 | 2022-01-03 21:06:01 | MASTER-IAC | (02h 15m 15.43s , -19d 46m 06.7s) | P- | 120 | 17.8 | Coadd 239 | 2022-01-03 21:06:51 | MASTER-IAC | (02h 14m 19.94s , -19d 38m 03.3s) | P| | 40 | 17.4 | 239 | 2022-01-03 21:06:51 | MASTER-IAC | (02h 15m 17.98s , -19d 44m 37.2s) | P- | 40 | 17.0 | 304 | 2022-01-03 21:07:51 | MASTER-IAC | (02h 14m 14.94s , -19d 39m 00.8s) | P| | 50 | 17.6 | 304 | 2022-01-03 21:07:51 | MASTER-IAC | (02h 15m 12.96s , -19d 45m 34.8s) | P- | 50 | 17.3 | 384 | 2022-01-03 21:09:01 | MASTER-IAC | (02h 14m 15.27s , -19d 38m 01.3s) | P| | 70 | 17.7 | 384 | 2022-01-03 21:09:01 | MASTER-IAC | (02h 15m 13.24s , -19d 44m 34.7s) | P- | 70 | 17.5 | 628 | 2022-01-03 21:13:10 | MASTER-IAC | (02h 25m 19.39s , -25d 29m 21.6s) | C | 60 | 18.4 | 628 | 2022-01-03 21:13:10 | MASTER-IAC | (02h 34m 20.43s , -25d 34m 51.2s) | C | 60 | 18.1 | 790 | 2022-01-03 21:15:52 | MASTER-IAC | (01h 55m 37.60s , -19d 53m 42.3s) | C | 60 | 18.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.