{
  "bibcode": "2015GCN.18556....1R",
  "body": "V. Rumyantsev (CrAO), E. Mazaeva (IKI),  A. Volnova (IKI), A. Pozanenko\n(IKI) report on  behalf of larger GRB follow-up collaboration:\n\nWe observed the field of the Swift GRB 150910A (Pagani et al., GCN\n18264) with ZTSh telescope of CrAO observatory on Sep. 11 and Sep. 12.\nWe took several images in R,B-filters of 120 s exposure under good\nweather conditions on Sep. 11 and non-optimal weather conditions (mean\nseeing of 4\") on Sep. 12.\n\nThe photometry of the afterglow (Pagani et al., GCN 18264; Zheng &\nFilippenko, GCN 18265) is following\n\nDate       UT start,  t-t0     Filter   Exp.    OT    OT_err UL(3sigma)\n                       (mid, days)        (s)\n\n2015-09-11 17:56:37   1.3762   R        10*120  21.69 0.12   22.9\n2015-09-11 18:18:31   1.4022   B        20*120  22.48 0.15   23.5\n2015-09-11 18:39:47   1.4244   R        10*120  21.82 0.10   23.2\n2015-09-11 19:22:17   1.4436   B        16*120  22.09 0.10   23.5\n2015-09-12 18:04:32   2.3801   R        10*120  n/d   n/a    22.3\n\nThe photometry is based on SDSS stars used in GCN 18281 (Mazaeva et al.)",
  "circularId": 18556,
  "createdOn": 1446578033000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 150910A: CrAO optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 150910A"
}