{
  "createdOn": 1754353868546,
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "bibcode": "2025GCN.41230....1L",
  "subject": "Fermi  trigger No 776041355: 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-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB250804.96 (trigger No 776041355,00h 05m 28.80s , -68d 42m 00.0s, R=2.88) errorbox  53 sec after notice time and 373 sec after trigger time at 2025-08-04 23:08:44 UT, with upper limit up to  19.1 mag. Observations started at twilight.  The observations began at zenith distance = 72 deg. The sun  altitude  is -14.6 deg. \n\nThe galactic latitude b = -48 deg., longitude l = 309 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/observ.php?id=2959916\n\nWe obtain a following upper limits.  \n\nTmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n     409 | 2025-08-04 23:08:44 |         MASTER-OAFA | (23h 51m 05.63s , -70d 19m 26.1s) |   C |    70 | 16.5 |        \n    2917 | 2025-08-04 23:50:07 |         MASTER-OAFA | (00h 04m 24.18s , -68d 52m 59.9s) |   C |   120 | 18.3 |        \n    3037 | 2025-08-04 23:50:07 |         MASTER-OAFA | (00h 04m 24.18s , -68d 52m 59.9s) |   C |   360 | 19.1 |  Coadd \n    3043 | 2025-08-04 23:52:13 |         MASTER-OAFA | (00h 04m 23.52s , -68d 52m 56.6s) |   C |   120 | 18.4 |        \n    3169 | 2025-08-04 23:54:19 |         MASTER-OAFA | (00h 04m 22.77s , -68d 52m 54.6s) |   C |   120 | 18.3 |        \n    3296 | 2025-08-04 23:56:26 |         MASTER-OAFA | (00h 04m 22.14s , -68d 52m 51.8s) |   C |   120 | 18.0 |        \nFilter C is a clear (unfiltred) band. \n\n\nThe observation and reduction will continue. \nThe message may be cited.\n",
  "submittedHow": "email",
  "circularId": 41230
}