{
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "createdOn": 1764646234317,
  "eventId": "GRB 251202A",
  "submittedHow": "email",
  "bibcode": "2025GCN.42938....1L",
  "subject": "Fermi GRB 251202A: Global MASTER-Net observations report",
  "body": "V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, \nG.Antipov,  A.Sankovich, Yu.Tselik, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU),\nO.Gress, N.Budnev (ISU),\nC.Francile,  F. Podesta, R.Podesta, E. Gonzalez  (Observatorio Astronomico Felix Aguilar (OAFA),\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\nA.Sosnovskij (CrAO),\nA. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity),\nD.Buckley (SAAO),\nR.Rebolo (The Instituto de Astrofisica de Canarias),\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,\nA.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) \n\nMASTER-SAAO robotic telescope  [1]  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 251202A ( Fermi GBM team, GCN 42933) errorbox  570 sec after notice time and 604 sec after trigger time at 2025-12-02 02:00:56 UT, with upper limit up to  18.8 mag. Observations started at twilight.  The observations began at zenith distance = 76 deg. The sun  altitude  is -15.8 deg. \n\nThe galactic latitude b = 31 deg., longitude l = 177 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/observ.php?id=3057770\n\nWe obtain a following upper limits.  \n\nTmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n     634 | 2025-12-02 02:00:56 |         MASTER-SAAO | (07h 56m 46.47s , +43d 37m 13.0s) |   C |    60 | 17.7 |        \n     694 | 2025-12-02 02:00:56 |         MASTER-SAAO | (07h 56m 46.46s , +43d 37m 13.0s) |   C |   180 | 18.6 |  Coadd \n     634 | 2025-12-02 02:00:56 |         MASTER-SAAO | (07h 59m 07.79s , +43d 21m 09.1s) |   C |    60 | 18.0 |        \n     694 | 2025-12-02 02:00:56 |         MASTER-SAAO | (07h 59m 07.80s , +43d 21m 09.1s) |   C |   180 | 18.8 |  Coadd \nFilter C is a clear (unfiltred) band. \n\n\nThe observation and reduction will continue. \nThe message may be cited.\n\n[1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023,  Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp.\nhttp : // www.pereplet.ru/lipunov/625.html\n",
  "circularId": 42938
}