{
  "bibcode": "2016GCN.20006....1A",
  "body": "G. B. Ali, Y. Hendy, A. Takey, N. Essam, and A. Essam (NRIAG, Egypt) \nreport on behalf of the Kottamia collaboration:\n\nWe observed the field of the Fermi GRB 160925A (trigger #496473540) with\nthe 1.88m telescope of the KAO (Kottamia Astronomical Observatory),\nEgypt. The observation was performed in the Rc-band at the Newtonian\ncamera (F4.8) and started at 2016-09-29 T19:58:17 UT (~4.08 day after\nthe burst). \n\nWe obtained several exposures in the Rc-band each one with 300s exposure\ntime.  We clearly detected the optical transient (Lipunov et al., GCN\n19938; Guidorzi et al., GCN  19939). \n\nThe following accurate photometry is obtained for the transient: \n\nUT (Start)                            Rc           error*   \n\n2016-09-29T19:58:17       17.260   0.011 \n\n2016-09-29T20:03:31       17.232   0.011 \n\n2016-09-29T20:08:42       17.252   0.012 \n\n2016-09-29T20:13:53       17.326   0.013 \n\n2016-09-29T20:19:04       17.267   0.012 \n\n2016-09-29T20:24:15       17.223   0.011 \n\n2016-09-29T20:29:26       17.305   0.011 \n\n2016-09-29T20:34:37       17.281   0.012 \n\n2016-09-29T20:39:48       17.239   0.011 \n\n---------------------------------------------------- \n\n(*) Poisson noise error only. \n\nThe Photometric calibration is based on nearby USNO-B1.0 stars\n\nUSNO-B1.0        R2 \n\n0750-0813981 13.69 \n\n0750-0813991 14.20 \n\n0750-0813958 14.93 \n\n0750-0813917 15.62\n\n[GCN OPS NOTE(08oct16): Per author's request, the signature block and the appended\ncopy of the 19947 circular have been removed.]",
  "circularId": 20006,
  "createdOn": 1475795113000,
  "email": "gamalali@lycos.com",
  "subject": "GRB 160925A: Kottamia R-band observation",
  "submitter": "Gamal B. Ali at NRIAG  <gamalali@lycos.com>",
  "eventId": "GRB 160925A"
}