{
  "bibcode": "2016GCN.19219....1M",
  "body": "E. Mazaeva (IKI), A. Volnova\n  (IKI), R. Inasaridze (AbAO), V. Ayvazian (AbAO), I. Molotov (KIAM), A. \nPozanenko (IKI) report on behalf of larger\nGRB follow-up collaboration:\n\nWe observed the field of Swift GRB 160321A (Stamatikos et al., GCN \n19211) with AS-32 (0.7m) telescope of Abastumani Observatory starting on \nMar. 21 (UT) 16:26:45. We obtained several unfiltered images of the \nfield. We do not detect any source within enhanced XRT error circle \n(Beardmore et al., GCN 19213) down to 21.9m. A probable source (S/N = 2) \ndetected 3.5 arcsec South from the center of XRT error circle (Beardmore \net al., GCN 19213) in coordinates (J2000) 06:37:40.74 +05:44:48.2 +/- \n0.5 arcsec in both coordinates.\n\nPreliminary photometry of the field is following\n\n\nDate       UT start   t-T0     Filter  Exp.    UL (3 sigma)\n                      (mid, days)       (s)\n\n2016-03-21 16:26:45   0.06839  none    41*120  21.9\n\nPhotometry is based on nearby USNO-B1.0 stars\nUSNO-B1_id   R2\n0956-0104166 16.23\n0957-0105913 15.38\n0957-0106394 14.58\n0956-0104566 15.41",
  "circularId": 19219,
  "createdOn": 1458678303000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 160321A: AbAO optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 160321A"
}