TITLE: GCN CIRCULAR NUMBER: 33131 SUBJECT: Fermi trigger No 694232203: Global MASTER-Net observations report DATE: 23/01/01 02:30:33 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, 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 GRB230101.09 (trigger No 694232203,13h 45m 12.00s , -21d 56m 24.0s, R=2.79) errorbox 33 sec after notice time and 72 sec after trigger time at 2023-01-01 02:17:51 UT, with upper limit up to 18.8 mag. Observations started at twilight. The observations began at zenith distance = 45 deg. The sun altitude is -14.5 deg. The galactic latitude b = 39 deg., longitude l = 320 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2188809 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 77 | 2023-01-01 02:17:51 | MASTER-SAAO | (13h 35m 00.22s , -19d 18m 53.8s) | C | 10 | 16.6 | 123 | 2023-01-01 02:18:31 | MASTER-SAAO | (13h 34m 54.19s , -19d 19m 56.2s) | C | 20 | 17.6 | 167 | 2023-01-01 02:19:11 | MASTER-SAAO | (13h 34m 58.53s , -19d 19m 32.4s) | C | 30 | 17.8 | 222 | 2023-01-01 02:20:00 | MASTER-SAAO | (13h 34m 55.95s , -19d 18m 01.4s) | C | 40 | 18.0 | 282 | 2023-01-01 02:20:00 | MASTER-SAAO | (13h 34m 55.95s , -19d 18m 01.4s) | C | 160 | 18.8 | Coadd 298 | 2023-01-01 02:21:12 | MASTER-SAAO | (13h 34m 55.84s , -19d 19m 42.3s) | C | 50 | 18.0 | 378 | 2023-01-01 02:22:21 | MASTER-SAAO | (13h 34m 59.07s , -19d 18m 02.8s) | C | 70 | 18.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.