{
  "bibcode": "2014GCN.17245....1B",
  "body": "D.Buckley, S. Potter, A. Kniazev, M. Kotze\nSouth African Astronomical Observatory\n\nE. Gorbovskoy,V. Lipunov, N.Tyurina, P.Balanutsa, D.Denisenko, \nM.Pruzhinskaya, A.Kuznetsov, V.Kornilov, D.Kuvshinov,\nLomonosov Moscow State University, Sternberg Astronomical Institute\n\nO.Gres, K.Ivanov,  S.Yazev, N.M.Budnev,  V.A.Poleshchuk\nIrkutsk State University\n\nV.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov\nBlagoveschensk Educational State University\n\nA. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik\nKislovodsk Solar Station of the Pulkovo Observatory\n\nV.Krushinsky, I.Zalozhnih,  A. Popov\nUral Federal University, Kourovka\n\nH. Levato and C. Saffe\nInstituto de Ciencias Astronomicas de la Tierra y del Espacio (ICATE),\nSan Juan, Argentina\n\nC. Mallamacci, C. Lopez and F. Podest\nObservatorio Astronomico Felix Aguilar (OAFA), San Juan National University, \nArgentina\n\nMASTER-SAAO  robotic telescope (MASTER-Net: http://observ.pereplet.ru)\ninstalled several days ago  in South African Astronomical\nObservatory (Sutherland) was automatically  pointed\nto the  Swift and Fermi GRB 141225A (Avanzo  et. al. GCN 17229).\nFirstly MASTER-SAAO pointed by FERMI coordinates and made first exposure 28 \nsec after FERMI trigger at  2014-12-25 23:02:28 UT (Buckley et al., \n17233).\nThen MASTER-SAAO pointed to the  Swift coordinates 20 sec after  Swift notice \ntime and 113 sec after trigger time at 2014-12-25 23:03:00 UT.\n\nThe results of our photometery are:\n\n   Start   T-T_mid  Exp.  Mag   Coadd\n\n   UT         s      s    unf    ?\n\n23:03:00    123    20    17.1   no\n23:03:34    161    30    17.3   no\n23:04:15    207    40    17.5   no\n23:05:05    263    50    17.7   no\n23:06:06    329    60    18.9   no\n23:07:17    405    70    18.7   no\n23:08:38    556   200    19.0    2\n23:12:19    823   290    19.8    2\n23:17:31   3161  3600    21.3   20\n\n\n\nOur  band  is well described by a parity 0.8R+0.2B (USNO B1).\nThe light curve from 113 to 300 power low index is about\n  alpha ~= 0.76+-0.10  (F ~ t_-alpha)\n\nand alpha =~ 1.51 from 400 to 1500 .\nWe see ~1 magnitude depression  at 329 sec.\n\nThe magnitudes in the table are not corrected for the Galactic extinction\nbecause its less than the our errors (Schlegel et al. 1998).\n\nThe light curve is available at \nhttp://master.sai.msu.ru/static/GRB/GRB141225A.png\n\nThis message may be cited.",
  "circularId": 17245,
  "createdOn": 1419769017000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB 141225A: MASTER-SAAO OT light curve",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 141225A"
}