{
  "bibcode": "2014GCN.16871....1G",
  "body": "E. Gorbovskoy, V. Lipunov, M.Pruzhinskaya,  V.Kornilov, D.Kuvshinov, N.Tyurina, \nN.Shatskiy, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Denisenko, \nLomonosov Moscow State University,\nSternberg Astronomical Institute, Moscow State University\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\nK.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk\nIrkutsk State University\n\nV.Krushinski, I.Zalozhnih,  A. Popov\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\n\n\nThree MASTER system telescopes (MASTER-Net: http://observ.pereplet.ru) \nlocated in Blagoveshchensk, Tunka and Kislovodsk have observed GRB140630A \n(Negoro et. al GCN 16855).\n\nMASTER II  robotic telescope located in Blagoveschensk was pointed to the \nGRB140930A 21 sec after notice time and 6331 sec after trigger time at \n2014-09-30 16:12:34 UT in two polarizations. On our single and coadd \nimages we  not found credible optical transient within MAXI error-box \n(Negoro et. al GCN 16855). The 5-sigma upper limit on single (180 s) \nimages has been about 18.1 mag. The 5-sigma upper limit on coadd of 13 \nimage with total exposure 2340 s is about 19.5m\n\nMASTER II  robotic telescope located in Kislovodsk was pointed to the \nGRB140930A 22 sec after notice time and 6332 sec after trigger time at \n2014-09-30 16:12:35 UT in two polarizations. On our single and coadd \nimages we not found credible optical transient within MAXI error-box. The \n5-sigma upper limit on single (180 s) images has been about 18.5 mag. The \n5-sigma upper limit on coadd of first 12 image with total exposure 2160 s \nis about 20.5m\n\nMASTER II  robotic telescope  located in Tunka was pointed to the \nGRB140930A 93 sec after notice time and 6415 sec after trigger time at \n2014-09-30 16:13:58 UT in two polarizations. On our single and coadd \nimages we not found credible optical transient within MAXI error-box. The \n5-sigma upper limit on single (180 s) images has been about 17.9 mag. The \n5-sigma upper limit on coadd of 13 image with total exposure 2340 s is \nabout 20.0 m\n\nThe upper limits received by MASTER are given in the table below:\n\nt_start      | t-t_mid     | exptime | filt | lim  | site | coadd\n-------------+-------------+---------+------+------+------+-------\n16:12:35.693 | 6485 sec    |     180 | P    | 18.5 | K    |     1\n16:12:35.693 | 6485 sec    |     540 | P    | 19.5 | K    |     3\n16:19:43.551 | 8075 sec    |    2160 | C    |~20.5 | K    |    12\n16:12:34.498 | 6484 sec    |     180 | P    | 18.1 | B    |     1\n17:20:44.913 | 12010 sec   |    2520 | C    | 19.5 | B    |    14\n16:13:58.211 | 6568 sec    |     180 | P    | 17.9 | T    |     1\n16:32:51.181 | 9877 sec    |    2340 | C    |~20.0 | T    |    13\n\nOur white (clear) band is well described by a parity 0.8R+0.2B (USNO B1).\n\n\nThe MASTER-NET coverage map available here:\nhttp://master.sai.msu.ru/static/GRB/GRB140930A/GRB140930A_cm.png\n\nThe MASTER image of MAXI error box with upper limit ~20m available here \n(10Mb):\nhttp://master.sai.msu.ru/static/GRB/GRB140930A/GRB140930A_img.jpeg\n\nThe message may be cited.",
  "circularId": 16871,
  "createdOn": 1412175583000,
  "email": "gcncirc@observ.inetcomm.ru",
  "subject": "GRB 140930A/MAXI J2259+524: MASTER  optical observations",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>",
  "eventId": "GRB 140930A"
}