{
  "bibcode": "2012GCN.13635....1I",
  "body": "K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk\n  Irkutsk State University\n\n  E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, \nN.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, \nA.Kuznetsov, A.Sankovich\n  Sternberg Astronomical Institute, Moscow State University\n\n  V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov\n  Blagoveschensk Educational State University, Blagoveschensk\n\n  A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik\n  Kislovodsk Solar Station of the Pulkovo Observatory\n\n  V.Krushinski, I.Zalozhnih,  A. Popov\n  Ural Federal University, Kourovka\n\n  Hugo Levato and Carlos Saffe\n  Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)\n\n  Claudio Mallamaci, Carlos Lopez and Federico Podest\n  Observatorio Astronomico Felix Aguilar (OAFA)\n\n\n  MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) \nlocated in Tunka was pointed to the  GRB120811C (Barlow et al., GCN 13622) \n40 sec s after notice time and 676 sec after GRB time at 2012-08-11 15:46:08.449 UT. On our \nfirst (130s exposure) set we have found OT  within SWIFT-BAT error-box in \ntwo polarizations.\n\nThe preliminary robotic photometry (m=0.2B + 0.8R, Usno B magnitudes) is:\n\ndatetime\t                   coord2000           Band     mag   error\n\n2012-08-11 15:46:08.449\t13h 18m 43.90s , +62d 18m 02s.1\tP|\t17.3\t0.2\n2012-08-11 15:46:09.684\t13h 18m 43.86s , +62d 18m 02s.3\tP-\t17.2\t0.1\n2012-08-11 15:49:12.268\t13h 18m 43.76s , +62d 18m 02s.3\tP|\t17.6\t0.2\n2012-08-11 15:49:12.282\t13h 18m 43.93s , +62d 18m 02s.6\tP-\t17.6\t0.2\n2012-08-11 15:52:52.452\t13h 18m 43.75s , +62d 18m 01s.8\tP|\t17.8\t0.2\n\nSo, MASTER-Net have simultaneous optical observations in four \npolarizations (see Denisenko et al., GCN 13623) of GRB120811C.\n\nThe message may be cited.",
  "circularId": 13635,
  "createdOn": 1344841534000,
  "email": "gcncirc@observ.inetcomm.ru",
  "subject": "GRB 120811C: MASTER-Tunka OT observations",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>",
  "eventId": "GRB 120811C"
}