{
  "bibcode": "2006GCN..5224....1K",
  "body": "I. Khamitov (TUG), A.T.Saygac (Ist.Uni), Z. Aslan (TUG), U. Kiziloglu \n(METU), E. Gogus (Sabanci Uni.), S.Alis, O.Onal (Ist.Uni)\nR. Burenin, M. Pavlinsky, R. Sunyaev (IKI)\nI. Bikmaev, N. Sakhibullin (KSU/AST),\n\nreport:\n\nWe observed the field around the position of the optical counterpart \n(Rykoff et al. GCN 5220, Page et al., GCN5221) of GRB060605 (Swift trigger \n213630) with the Russian-Turkish 1.5-m telescope (RTT150, Bakirlitepe, \nTUBITAK National Observatory, Turkey), starting at June 05, 23:41 UT, i.e. \n~5.42 hours after the burst. A series of frames was taken (20*60s \nexposures in R) with TFOSC. The afterglow is detected clearly in all \nimages. Observations were made under strong wind weather.\n\nUsing USNO-B1 star (RA=21:28:40.26, DEC=-06:03:44.5,\nR2MAG=15.37) we estimate the following Rc magnitudes for the OT:\n\n    t-t0  m_R     err\n    5.62  19.767  0.03\n    5.83  19.873  0.03\n    6.17  19.911  0.03\n    6.37  20.010  0.04\n\nThe power-law decay index in R is -1.6+-0.3 between 5.62 and 6.37 hours\nafter the burst. Comparing our decay slope with that derived from\nearlier ROTSE data (Schaefer et al., GCN 5222) we conclude that there\nwas a break in OT light curve between 1 and 5 hours after the burst.\n\nThis message may be cited.",
  "circularId": 5224,
  "createdOn": 1149572723000,
  "email": "irekk@tug.tug.tubitak.gov.tr",
  "subject": "GRB 060605: RTT150 optical observations",
  "submitter": "Irek Khamitov at TUG  <irekk@tug.tug.tubitak.gov.tr>",
  "eventId": "GRB 060605"
}