{
  "createdOn": 1739323190803,
  "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) was pointed to the Integral GRB250211.89 (trigger No 11044,18h 25m 33.49s , -31d 57m 36.2s, R=0.0533333) errorbox  12195 sec after notice time and 12210 sec after trigger time at 2025-02-12 00:51:28 UT, with upper limit up to  16.7 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -36.1 deg. \n\nThe galactic latitude b = -10 deg., longitude l =  2 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/observ.php?id=2775663\n\nWe obtain a following upper limits.  \n\nTmid-T0  |          Site       |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n   12300 |         MASTER-SAAO |   C |   180 | 16.1 |        \n   12480 |         MASTER-SAAO |   C |   540 | 15.8 |  Coadd \n   12500 |         MASTER-SAAO |   C |   180 | 16.2 |        \n   12699 |         MASTER-SAAO |   C |   180 | 16.4 |        \n   12904 |         MASTER-SAAO |   C |   180 | 16.4 |        \n   13103 |         MASTER-SAAO |   C |   180 | 16.5 |        \n   13302 |         MASTER-SAAO |   C |   180 | 16.6 |        \n   13502 |         MASTER-SAAO |   C |   180 | 16.7 |        \nFilter C is a clear (unfiltred) band. \n\n\nThe observation and reduction will continue. \nThe message may be cited.\n",
  "circularId": 39295,
  "eventId": "GRB 250211.89",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "submittedHow": "email",
  "bibcode": "2025GCN.39295....1L",
  "subject": "Integral GRB250211.89: Global MASTER-Net observations report"
}