{
  "circularId": 45927,
  "body": "D.Buckley (SAAO),\n\nV.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 (Lomonosov MSU)\n\nA. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity)\nA.Sosnovskij (Lomonosov MSU)\n\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory)\n\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\nR.Rebolo (The Instituto de Astrofisica de Canarias)\n\nO.Gress, N.Budnev(ISU)\n\nM. Segura,  F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA)\n\n\nMASTER-SAAO robotic telescope  [1]  located in South Africa (South African Astronomical Observatory) started inspect of the MAXI GRB261012.23 (trigger No 325185202,19h 46m 47.04s , -36d 11m 34.8s, R=1) errorbox  39534 sec after notice time and 42725 sec after trigger time at 2026-10-12 17:28:29 UT, with upper limit up to  17.5 mag. Observations started at twilight.  The observations began at zenith distance =  8 deg. The sun  altitude  is -9.8 deg. \n\nThe galactic latitude b = -27 deg., longitude l =  4 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/observ.php?id=3525281\n\nWe obtain a following upper limits.  \n\nTmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n   42816 | 2026-10-12 17:28:29 |         MASTER-SAAO | (19h 44m 08.82s , -36d 25m 58.2s) |   C |   180 | 12.6 |        \n   43028 | 2026-10-12 17:32:02 |         MASTER-SAAO | (19h 41m 57.73s , -36d 11m 17.0s) |   C |   180 | 17.5 |        \n   43028 | 2026-10-12 17:32:02 |         MASTER-SAAO | (19h 44m 14.00s , -36d 26m 51.4s) |   C |   180 | 17.3 |        \n   43242 | 2026-10-12 17:35:36 |         MASTER-SAAO | (19h 41m 50.99s , -36d 12m 11.7s) |   C |   180 | 14.5 |        \n   43242 | 2026-10-12 17:35:36 |         MASTER-SAAO | (19h 44m 07.26s , -36d 27m 47.2s) |   C |   180 | 14.4 |        \n   43670 | 2026-10-12 17:42:44 |         MASTER-SAAO | (19h 41m 54.61s , -36d 10m 08.7s) |   C |   180 | 14.7 |        \n   43670 | 2026-10-12 17:42:44 |         MASTER-SAAO | (19h 44m 11.29s , -36d 25m 44.2s) |   C |   180 | 14.5 |        \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",
  "createdOn": 1791827491316,
  "submittedHow": "email",
  "eventId": "GRB 261012.23",
  "subject": "MAXI GRB261012.23: Global MASTER-Net observations report",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>"
}