{
  "bibcode": "2015GCN.18281....1M",
  "body": "E. Mazaeva (IKI), I. Reva (Fesenkov Astrophysical Institute),   A. \nKusakin (Fesenkov Astrophysical Institute), A. Volnova (IKI), A. \nPozanenko  (IKI) report on behalf of larger GRB follow-up collaboration:\n\nWe observed the field of GRB 150910A (Pagani et al., GCN  18264)  with \nZeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory on \nSep. 10 (UT) 18:02:59 -- 20:37:38.  We obtained several images in R and \nB filters.  In both filters the afterglow  (Pagani et al., GCN 18264; \nZheng & Filippenko, GCN 18265) is clearly visible. Within 2.5 hours of \nobservations we do not detect significant fading of the afterglow. The \nphotometry of combined images are following\n\nDate       UT start    t-T0     Filter  Exp.     OT       Err\n                        (mid, days)      (s)\n\n2015-09-10 18:08:20    0.42807  R       11*300   20.18 +/- 0.05\n2015-09-10 18:02:59    0.42436  B       12*300   20.85 +/- 0.08\n\nThe photometry is based on nearby SDSS stars\n\nSDSS_id            R(Lupton)\nJ002232.47+332751.3    16.29\nJ002236.24+332854.2    15.92\nJ002241.61+332836.1    16.23\nJ002248.33+332723.4    16.76\nJ002231.90+333004.8    16.93\nJ002225.39+332809.6    16.12\nJ002246.76+332716.9    17.63\n\nOur photometry in R-filter is in agreement with  in subsequent \nobservations (Moskvitin & Goranskij, GCN 18275).",
  "circularId": 18281,
  "createdOn": 1441999641000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 150910A: TSHAO optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 150910A"
}