{
  "bibcode": "2010GCN.10521....1R",
  "body": "V. Rumyantsev (CrAO), A. Pozanenko (IKI)  report on behalf of larger GRB \nfollow-up collaboration:\n\nWe observed the field of the Swift GRB 100316A (Baumgartner  et al. GCN \n10484) with Shajn telescope of CrAO starting (UT) March 16  19:15   under \ndescending weather conditions and mean seeing of  2 arcsec. No object is \ndetected in enhanced XRT error circle (Evans, GCN 10490).\n\nThe upper limit of point like object in a stacked image based on USNO-B1.0 \nstar 1618-0120609 (J2000) RA= 16:48:06.44 Dec= +71:50:15.2  (assuming \nR2=15.25)  is following:\n\nT0+      Filter,   Exposure, mag.\n(mid, d)              (s)\n\n0.7061   R       8x60    > 21.6\n\nThe non-detection is strongly support the object of R~20.5 reported in GCN \n10487 (Gorosabel et al) is the optical afterglow of GRB100316A.",
  "circularId": 10521,
  "createdOn": 1268875398000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 100316A: optical observations in CrAO",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 100316A"
}