{
  "bibcode": "2016GCN.19775....1M",
  "body": "E. Mazaeva (IKI),  E. Chornaya (UAFO, ISON), A. Matkin (UAFO), I. \nMolotov (KIAM), A. Pozanenko (IKI) report on behalf of  larger GRB \nfollow-up collaboration:\n\nWe observed the field of GRB 160804A  (Marshall et al., GCN 19761)  with \nSANTEL-650 (0.65m)  telescope  of UAFO/ISON-Ussuriysk observatory. We \nobtained several unfiltered images  starting on  August 04 (UT) \n12:03:56.  We clearly detected  optical source reported by Breeveld et \nal. (GCN 19764), Tyurina et al. (GCN 19768), Malesani et al. (GCN \n19770), Moskvitin et al. (GCN 19771), Xu et al. (GCN #19773) and Bolmer \net al. (GCN 19774). Preliminary photometry of a combined image is following\n\nDate       UT start   t-T0   Filter   Exp.  OT     Err.  UL\n                       (mid, days)     (s)\n\n2016-08-04 12:03:56 0.46189  CR      60*120 19.90  0.27  21.6\n\nPhotometry is based on nearby SDSS DR9 stars\nSDSS-DR9_id    R(Lupton)\nJ144642.43+100147.7    18.068\nJ144642.15+100017.4    17.644\nJ144638.04+095917.6    17.971\nJ144635.67+095910.6    18.378\nJ144619.22+095958.1    16.677\nJ144616.60+100018.4    16.575\nJ144614.88+100001.4    16.544",
  "circularId": 19775,
  "createdOn": 1470411606000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 160804A: ISON/UAFO optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 160804A"
}