{
  "bibcode": "2018GCN.22463....1M",
  "body": "E. Mazaeva (IKI),  A. Pozanenko (IKI),  E. Klunko (ISTP),  A. Volnova \n(IKI) report on behalf of of larger GRB follow-up collaboration:\n\nWe observed the field of LAT/Fermi GRB 180305A (Axelsson, et al., GCN \n22457) and Konus-Wind (Svinkin et al., GC 22461) with AZT-33IK telescope \nof Sayan observatory (Mondy).  We obtained several images in R-filter \nstarting on Mar. 06 (UT) 12:35:17.  The afterglow candidate  (Troja  et \nal., GCN 22460) is clearly detected within XRT/Swift error circle \n(D'Avanzo et al., GCN 22462). Preliminary photometry is following.\n\nDate        UT start  t-T0      Filter Exp.   OT      Err.  UL\n                       (mid, days)    (s)\n\n\n2018-03-06  12:35:17  1.15219    R     30*120 22.69   0.15  23.7\n\nThe photometry is based on nearby USNO-B1.0 stars\nUSNO-B1_id   R2\n\n1221-0050419 18.60\n\n1221-0050432 16.39\n\n1221-0050407 19.31\n\n\nSince the source has faded in comparison with the previous observation \n(Troja  et al., GCN 22460) we can confirm the afterglow of GRB 180305A.",
  "circularId": 22463,
  "createdOn": 1520356033000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 180305A: Mondy optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 180305A"
}