{
  "body": "V.Lipunov, E.Gorbovskoy, N.Tiurina,  P.Balanutsa, , D.Vlasenko, I.Panchenko,\nA.Kuznetsov,  G.Antipov,  A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin,\nV.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. 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  (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 GRB 250215A ( Fermi GBM team, GCN 39327) errorbox  553 sec after notice time and 587 sec after trigger time at 2025-02-15 02:41:42 UT, with upper limit up to  18.7 mag. The observations began at zenith distance = 40 deg. The sun  altitude  is -19.3 deg. \n\nThe galactic latitude b = 20 deg., longitude l = 273 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/observ.php?id=2779054\n\nWe obtain a following upper limits.  \n\nTmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n     617 | 2025-02-15 02:41:42 |         MASTER-SAAO | (10h 29m 47.15s , -34d 28m 22.2s) |   C |    60 | 18.3 |        \n     677 | 2025-02-15 02:41:42 |         MASTER-SAAO | (10h 29m 47.15s , -34d 28m 22.1s) |   C |   180 | 18.7 |  Coadd \n     697 | 2025-02-15 02:43:01 |         MASTER-SAAO | (10h 29m 47.06s , -34d 28m 20.0s) |   C |    60 | 18.2 |        \n     776 | 2025-02-15 02:44:20 |         MASTER-SAAO | (10h 29m 46.95s , -34d 28m 17.6s) |   C |    60 | 18.2 |        \n     855 | 2025-02-15 02:45:39 |         MASTER-SAAO | (10h 29m 46.86s , -34d 28m 15.1s) |   C |    60 | 18.1 |        \nFilter C is a clear (unfiltred) band. \n\n\nThe observation and reduction will continue. \nThe message may be cited.\n",
  "subject": "Fermi GRB 250215A: Global MASTER-Net observations report",
  "createdOn": 1739589420397,
  "circularId": 39328,
  "submittedHow": "email",
  "bibcode": "2025GCN.39328....1L",
  "eventId": "GRB 250215A",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>"
}