{
  "bibcode": "2016GCN.19561....1P",
  "body": "A. Pozanenko (IKI), E. Mazaeva (IKI),  P. Minaev (IKI), E. Klunko \n(ISTP), A. Volnova (IKI),  I. Korobtsev (ISTP),  report on behalf of \nlarger GRB follow-up collaboration:\n\nWe observed the field of the bright hard GRB 160623A initially reported \nby GBM and LAT (Vianello et al., GCN 19553; Mailyan et al., GCN 19555) \nand also observed by  Konus-Wind (Frederiks  et al., GCN 19554) and \nSPI-ACS/INTEGRAL  with AZT-33IK telescope of Sayan observatory (Mondy) \nstarting on June, 23 (UT) 18:21:25.  We obtained several images in \nR-filter under good weather conditions and FWHM of about 1.6 arcsec.  At \nthe edge of XRT error circle  (Mingo et al., GCN 19558) we detect a \nsource which is not presented in USNO-B1.0 and not visible in  POSS2 \n(any filter).  Coordinates of the source are (J2000) 21:01:11.57 \n+42:13:15.8 with uncertainty of 0.7 arcsec. Preliminary photometry   is \nfollowing\n\nt-T0    Filter  Exp.   OT(?) Err\n(mid, days)     (s)\n\n0.56330  R      20*60  19.94 0.07\n0.57720  R      20*60  19.94 0.07\n0.59112  R      20*60  20.32 0.13\n\nPhotometry is based on nearby USNO-B1.0 star\nUSNO-B.1_id  R2\n1322-0479855 15.22\n\nDespite a hint of some decaying of the source it is unclear whether \nsource is an afterglow of GRB 160623A.\n\nA finding chart can be found in \nhttp://grb.rssi.ru/GRB160623A/GRB160623A_160623_Mondy.png\nA light curve of SPI-ACS/INTEGRAL  can be found in \nhttp://grb.rssi.ru/GRB160623A/GRB160623A_spi-acs.png",
  "circularId": 19561,
  "createdOn": 1466769559000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 160623A: Mondy optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 160623A"
}