{
  "bibcode": "2011GCN.12238....1P",
  "body": "A.V. Parhomenko, A. Tlatov, D. Dormidontov\n  Kislovodsk Solar Station of the Pulkovo Observatory\n\n\n  K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev, O.Gres, \nO.Chuvalaev,E.Konstantinov,\n  Irkutsk State University\n\n  E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, \nN.Shatskiy, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. \nKornilov,A.Sankovich\n  Sternberg Astronomical Institute, Moscow State University\n\n\n  V.Krushinski, I.Zalozhnich, T.Kopytova, A. Popov\n  Ural State University, Kourovka\n\n  V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina\n  Blagoveschensk Educational State University, Blagoveschensk\n\n\nMASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) \nlocated in Tunka(Siberia) was pointed to the GRB110801A 101 sec after GRB \ntime at  2011-08-01 19:51:23 UT. Unfortunatelly the objects was not in \nfocus  because recently photometer modification.  On our first (20s\nexposure) set we haven`t found optical transient within SWIFT error-box\n(De Pasquale et al., GCN 12228).\nThe 3-sigma upper limit has been about 14.0 mag (white+polarizator).\n\n\nMASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located \nnear Kislovodsk (Caucasus Mountains)  closed roof 20 min before \ntrigger due to cloudy condidtions. The telescope was repointed to the\nGRB110901A  only 47 min 40 sec after trigger time at 2011-08-01 20:37:22 UT.\nWe found OT at UVOT postion (De Pasquale et al., GCN 12228).\nThe results of our photometry are:\n\nTime_Start    T_mean-T_trig  exp time       m        error      Band \nUT                  s          s \n20:37:22          2950        180         16.13       0.06        R\n20:44:29          3377        180         16.12       0.06        R \n20:48:01          3589        180         16.29       0.08        R\n20:48:01          3589        180         16.03       0.06     White \n20:51:24          3792        180         16.43       0.06        R\n20:51:24          3792        180         16.19       0.06     White\n23:20:14         12722        180         17.75       0.10        R\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.08 in the direction of the burst\n(Schlegel et al. 1998).\n\nThe power low index (F~t^-aplha) apha ~1.0+-0.1     during this \nobservations in R-band.\n\nThe message may be cited.",
  "circularId": 12238,
  "createdOn": 1312306355000,
  "email": "gcncirc@observ.inetcomm.ru",
  "subject": "GRB 110801A: MASTER OT observations",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>",
  "eventId": "GRB 110801A"
}