{
  "bibcode": "2005GCN..3763....1B",
  "body": "R. Burenin, A. Tkachenko, M. Pavlinsky, R. Sunyaev (IKI), \nI. Khamitov, Z. Aslan (TUG), U. Kiziloglu (METU), A. Alpar (SabUni),\nI. Bikmaev, N. Sakhibullin (KSU/AST)\n\nreport:\n\nWe observed error box of GRB 050803 (GCN 3748) with Russian-Turkish\n1.5-m telescope (RTT150, Bakyrlytepe, TUBITAK National Observatory,\nTurkey). The observations were started at 20:00 UT, i.e. 0.77 hours\nafter the burst. We observed the field till the dawn, which occurs at\n2:00 UT, Aug 4.\n\nWe made a set of 30--60s exposures in R. At the position of X-ray\nafterglow we found the object mentioned in GCN 3753, as well as one\nother fainter object at the edge of XRT error box, probably one of those\nmentioned in GCN 3758.\n\nThe first object is definitely extended. It have R=~22.2 and is stable\nwithin ~10\\% during whole our observations and therefore can not be\nproposed as possible OT candidate (GCN 3760). Brighter magnitude in GCN\n3760 was obtained because the magnitude of their reference star is\nmeasured with large error in USNO-B1.\n\nSecond object is close to the detection limit in our combined image,\nwhich is R=~25.5, but is also extended.\n\nOur finding chart can be found at:\n\nhttp://hea.iki.rssi.ru/~rodion/050803/r.jpg\n\nWe also note, that there is nearby foreground galaxy group in the field.\n\nThis message may be cited.",
  "circularId": 3763,
  "createdOn": 1123187096000,
  "email": "rodion@hea.iki.rssi.ru",
  "subject": "GRB 050803: RTT150 optical observations",
  "submitter": "Rodion Burenin at IKI, Moscow  <rodion@hea.iki.rssi.ru>",
  "eventId": "GRB 050803"
}