TITLE: GCN CIRCULAR NUMBER: 39695 SUBJECT: Fermi trigger No 763509110: Global MASTER-Net observations report DATE: 25/03/12 22:16:12 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs lipunov@xray.sai.msu.ru
V.Lipunov, E.Gorbovskoy, N.Tiurina, P.Balanutsa, , D.Vlasenko, I.Panchenko, A.Kuznetsov, G.Antipov, A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity) D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory)
MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB250312.91 (trigger No 763509110,11h 20m 38.40s , +63d 14m 24.0s, R=3.19) errorbox 38 sec after notice time and 61 sec after trigger time at 2025-03-12 21:52:47 UT, with upper limit up to 17.3 mag. The observations began at zenith distance = 21 deg. The sun altitude is -49.4 deg.
The galactic latitude b = 51 deg., longitude l = 139 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2810236
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
67 | 2025-03-12 21:52:47 | MASTER-Kislovodsk | (11h 35m 54.68s , +63d 26m 27.5s) | C | 10 | 16.0 | 82 | 2025-03-12 21:52:47 | MASTER-Kislovodsk | (11h 35m 54.60s , +63d 26m 28.4s) | C | 40 | 17.1 | Coadd 96 | 2025-03-12 21:53:16 | MASTER-Kislovodsk | (11h 35m 54.54s , +63d 26m 29.5s) | C | 10 | 16.0 | 132 | 2025-03-12 21:53:47 | MASTER-Kislovodsk | (11h 35m 54.37s , +63d 26m 30.6s) | C | 20 | 16.8 | 177 | 2025-03-12 21:54:27 | MASTER-Kislovodsk | (11h 20m 23.59s , +63d 23m 11.2s) | C | 30 | 17.1 | 232 | 2025-03-12 21:55:17 | MASTER-Kislovodsk | (11h 20m 23.31s , +63d 23m 12.5s) | C | 40 | 17.3 | 297 | 2025-03-12 21:56:17 | MASTER-Kislovodsk | (11h 20m 22.85s , +63d 23m 13.8s) | C | 50 | 17.3 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
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