{
  "bibcode": "2015GCN.18316....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) \nlocated in IAC (Tenerife, Spain) was pointed to the  GRB150915A 22 sec \nafter notice time and 95 sec after trigger time at 2015-09-15 21:20:03 UT \nin two polarizations. On our first single  (20s exposure) and coadd  (760s \nexposure)  sets we haven`t found optical transient  within SWIFT error-box \n(Elia et al. GCN 18315).\nThe 5-sigma upper limit has been about 17.3 on single and 19.8 on coadd \nimage.\n\nMASTER II  robotic telescope located in SAAO (South Africa) was pointed to \nthe  GRB150915A 25 sec after notice time and 100 sec after trigger time at \n2015-09-15 21:20:07 UT in two polarizations. On our first (20s exposure) \nset we haven`t found optical transient  within SWIFT error-box .\nThe 5-sigma upper limit has been about 17.2 mag\n\nThe message may be cited.",
  "circularId": 18316,
  "createdOn": 1442356723000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB 150915A: MASTER-NET optical observations",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 150915A"
}