{
  "bibcode": "2015GCN.17940....1M",
  "body": "E. Mazaeva (IKI), I. Reva (Fesenkov Astrophysical Institute), A. Volnova \n(IKI),  A. Pozanenko  (IKI) report on behalf of larger GRB follow-up \ncollaboration:\n\nWe observed the  V404 Cyg outburst  detected by BAT/Swift (Barthelmy et \nal., GCN 17929), GBM/Fermi (Younes, GCN 17932; Jenke GCN 17935),  and \nKonus-Wind (Golenetskiiet al., GCN 17938) with Zeiss-1000 (East) 1-m \ntelescope of Tien Shan Astronomical Observatory. Observations started on \nJune, 15 (UT) 18:50:44 and continued on June 16.  We obtained several \nimages in R-filter. The V404 Cyg optical outburst reported early (Gazeas \n  et al, GCN 17931; Oates GCN 17933) is clearly visible.  The V404 Cyg \nis overexposed in our initial images but can be recovered with more \ndetailed analysis.\n\nPreliminary light curve of the V404 Cyg can be found in\n\nhttp://grb.rssi.ru/V404_Cyg/v404_20150615_lc.png\n\nPhotometry is based on following USNO-B1.0 stars\n\nID              R2\n1238-0434779    13.52\n1238-0434864    14.12",
  "circularId": 17940,
  "createdOn": 1434552737000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "V404 Cyg outburst (Swift trigger 643949 ): TSHAO optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>"
}