{
  "bibcode": "2015GCN.18221....1R",
  "body": "R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres\nThe Instituto de Astrofisica de Canarias\n\nV. Lipunov, E. Gorbovskoy,  N.Tyurina, V.Kornilov,\nP.Balanutsa, A.Kuznetsov, D.Kuvshinov, E.Popova\nLomonosov Moscow State University, Sternberg Astronomical Institute\n\nK.Ivanov, O.Gres, N.M.Budnev, S.Yazev,\nIrkutsk State University\n\nD.Buckley, S. Potter, A.Kniazev, M.Kotze\nSouth African Astronomical Observatory\n\nA. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik\nKislovodsk Solar Station of the Pulkovo Observatory\n\nV.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov, A.Gabovich\nBlagoveschensk Educational State University, Blagoveschensk\n\nV.Krushinski, I.Zalozhnih\nUral Federal University, Kourovka\n\nHugo Levato and Carlos Saffe\nInstituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)\n\nClaudio Mallamaci, Carlos Lopez and Federico Podest\nObservatorio Astronomico Felix Aguilar (OAFA)\n\nMASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru; \nhttp://161.72.133.2/) \nlocated in IAC was pointed to the  GRB150831B 24 sec after notice time \nand 56 sec after trigger time at 2015-08-31 22:20:23 UT (Swift: Marshall \net al., GCN 18215; and Fermi:  Veres and C. Meegan, GCN 18220) .\nOn our first (10s exposure)  set (two polarisations) we  did  not found \noptical transient \nwithin SWIFT  error-box  (Marshall et al., GCN 18215; Evans et al., GCN \n18217) brighter then 16.3. The observations were stoped by beautifull \nCanarian sun rise ( see \nhttp://observ.pereplet.ru/images/webcam01spt2015.jpg ) at 2015-09-01 \n06:37:36 UT.\n\n\nPro.type\tDate time + -\t     Exp.time\tLimit\tFilt.\tTube.\n                    Start\nAlert      2015-08-31 22:20:23   \t10\t16.3\tP\tWEST\nAlert \t   2015-08-31 22:20:23\t        10\t15.6\tP\tEAST\nAlert \t   2015-08-31 22:21:07\t        20\t16.4\tP\tWEST\nAlert \t   2015-08-31 22:21:07\t        20\t15.9\tP\tEAST\nAlert \t   2015-08-31 22:21:37\t        30\t16.8\tP\tWEST\nAlert \t   2015-08-31 22:21:37\t        30\t16.2\tP\tEAST\nAlert \t   2015-08-31 22:22:18\t        30\t0.0*\tP\tWEST \nAlert \t   2015-08-31 22:22:18\t        30\t16.2\tP\tEAST\nAlert \t   2015-08-31 22:22:57\t        40\t16.9\tP\tWEST\nAlert \t   2015-08-31 22:22:57\t        40\t16.3\tP\tEAST\nAlert \t   2015-08-31 22:23:47\t        50\t17.0\tP\tWEST\nAlert \t   2015-08-31 22:23:47\t        50\t16.5\tP\tEAST\nAlert \t   2015-08-31 22:24:47\t        60\t17.0\tP\tWEST\nAlert \t   2015-08-31 22:24:47\t        60\t16.5\tP\tEAST\nAlert \t   2015-08-31 22:25:56\t        80\t17.2\tP\tWEST\nAlert \t   2015-08-31 22:25:56\t        80\t16.6\tP\tEAST\nAlert \t   2015-08-31 22:27:26\t        100\t17.2\tP\tWEST\nAlert \t   2015-08-31 22:27:26\t        100\t16.6\tP\tEAST\nAlert \t   2015-08-31 22:29:17\t        120\t17.3\tP\tWEST\nAlert \t   2015-08-31 22:29:17 \t        120\t16.6\tP\tEAST\nAlert \t   2015-08-31 22:31:27\t        140\t17.3\tP\tWEST\nAlert \t   2015-08-31 22:31:27\t        140\t16.7\tP\tEAST\nAlert \t   2015-08-31 22:33:57\t        170\t17.3\tP\tWEST\nAlert \t   2015-08-31 22:33:57\t        170\t16.7\tP\tEAST\n\n* - no stars \nOur server hase a lot of job in Milky Way star dust now.\n\nThis message may be cited.",
  "circularId": 18221,
  "createdOn": 1441092509000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB 150831B: MASTER-IAC early optical observations",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 150831B"
}