{
  "bibcode": "2009GCN..9037....1B",
  "body": "R. Burenin, A. Tkachenko, M. Pavlinsky, R. Sunyaev (IKI),  \nI. Khamitov, Z. Eker (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.),\nI. Bikmaev, N. Sakhibullin (KSU/AST)\n\nreport:\n\nThe optical afterglow of GRB 090323 (Updike et al., GCN 9026, Cenko et\nal., GCN 9027) was observed with Russian-Turkish 1.5-m telescope\n(RTT150, Bakirlitepe, TUBITAK National Observatory, Turkey). We obtained\n6x600s exposures in sdss-r filter, centered at March 25, 01:30 UT,\ni.e. 2.059 days after the burst.\n\nThe afterglow is detected in all frames. Using the same calibration star\nas it was used by Kann et al. (GCN 9033), we esimate the magnitude of\nthe OT as R=20.85+-0.04. During our observations we also marginally\ndetected gradual decline of the afterglow brightness at a rate of\napproximately 0.3 mag/hour, which is steeper than that assumed by the\ncomparison with the data obtained by Perley et al. (GCN 9036).\n\nOur light curve and finding chart can be found at:\n\nhttp://hea.iki.rssi.ru/grb/090323/indexeng.html",
  "circularId": 9037,
  "createdOn": 1237983757000,
  "email": "rodion@hea.iki.rssi.ru",
  "subject": "GRB 090323: RTT150 optical observations",
  "submitter": "Rodion Burenin at IKI, Moscow  <rodion@hea.iki.rssi.ru>",
  "eventId": "GRB 090323"
}