{
  "bibcode": "2009GCN..9548....1G",
  "body": "A. Galeev, I. Bikmaev, N. Sakhibullin (KSU/AST),\nR. Burenin, M. Pavlinsky, R. Sunyaev (IKI),\nI. Khamitov, Z. Eker (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.)\n\nreport:\n\nWe observed the OT (Schady et al., GCN 9512; Cenko et al., GCN 9513; Perley,\nGCN 9514; Rujopakarn et al., GCN 9515) of the Swift GRB 090618 with\nRussian-Turkish 1.5-m telescope (RTT150, Bakirlitepe, TUBITAK National\nObservatory, Turkey), in BRc bands, starting at 22 Jun, 00:03 UT,\ni.e. approximately 3.65 days after the burst, using TFOSC.\n  \nWe made 3x900s exposures in Rc band and 2x900 in B band. The OT is detected\nin all images. Using the same USNO-B1 star as it was used by Rumyantsev and\nPozanenko (GCN 9539) we estimate Rc magnitude as m_Rc=21.60+/-0.04 (3.68\ndays after the burst).\n\nThe finding chart can be found at:\n\nhttp://hea.iki.rssi.ru/grb/090618/indexeng.html",
  "circularId": 9548,
  "createdOn": 1245664224000,
  "email": "rodion@hea.iki.rssi.ru",
  "subject": "GRB 090618: RTT150 optical observations",
  "submitter": "Rodion Burenin at IKI, Moscow  <rodion@hea.iki.rssi.ru>",
  "eventId": "GRB 090618"
}