{
  "bibcode": "2016GCN.19490....1M",
  "body": "E. Mazaeva (IKI),  E. Klunko (ISTP), A. Volnova (IKI),   I. Korobtsev\n(ISTP),  A. Pozanenko (IKI) report on behalf of larger GRB follow-up\ncollaboration:\n\nWe observed the field of the Swift  GRB 160601A (Kocevski et al., GCN\n19478) with AZT-33IK telescope of Sayan observatory (Mondy)  starting on \nJune, 01 (UT) 15:00:41, i.e. 17 minutes after GRB trigger (GCN 19483). \nIn a combined image we detected both NOT sources (Malesani et al., GCN \n19485) near enhanced XRT error circle (Evans et al., GCN 19484). \nPreliminary photometry (Vega) of the sources are following\n\nDate        UT start   t-T0    Filter Exp.  NOT1          NOT2\n                       (mid, days)     (s)\n\n2016-06-01  15:00:41   0.04181  R    85*60  22.40+/-0.25  22.10+/-0.20\n\nPhotometry is based on nearby SDSS-DR9 stars, Lupton transformations into R:\nSDSS-DR9_id            R(Lupton)\nJ153959.67+643325.7    16.72\nJ153956.37+643102.2    17.00\nJ153931.88+643247.0    17.02\nJ153927.50+643304.3    19.23\nJ153942.70+643016.4    16.27\n\nA finding chart can be found at \nhttp://grb.rssi.ru/GRB160601A/GRB160601A_Mondy_160601_NOT_1_2.png",
  "circularId": 19490,
  "createdOn": 1464878118000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 160601A: Mondy optical observations, photometry of NOT sources",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 160601A"
}