{
  "bibcode": "2010GCN.11084....1M",
  "body": "A. S. Moskvitin, T. A. Fatkhullin, V. V. Sokolov, T. N. Sokolova & V. N.\nKomarova (SAO RAS, Niznijh Arkhyz, Russia), report:\n\nWe performed further observations of the GRB100805A (Hoversten\nE. A. et al., GCN 11047) field with the Zeiss-1000 telescope of SAO RAS,\nRussia. The observations were carried out in the Rc band on Aug.\n12.821 - 13.046 UT under good transparency and seeing of 2\".5. Total\nintegration time is 15600 sec.\n\nWe do not detect any objects at the position of the OT up to limiting\nmagnitude R = 24.2 (3-sigma limit for stellar-like object).\n\nWe assumed the magnitude of the reference USNO-B1.0 star (L. P. Xin et al.,\nGCN 11065; A. S. Moskvitin et al., GCN 11071, A. S. Moskvitin et al.,\nGCN 11076, A. S. Moskvitin et al., GCN 11079) as R = 17.41.\n\nAlso we confirm the magnitude of the source reported by V. Rumyantsev and\nA. Pozanenko (GCN 11077) as  R = 22.47 +/- 0.06 according to their standard\nstar with R=17.59. All errors are formal and they do not include errors of\nthe USNO-B1.0 to Johnson-Cousins photometric system transformation.\n\nCombining all data in the R-band we found that late-time light curve\n(T-T_0 > 2.3 days) behaviour follows the one of the early stage (F ~\nt^-0.77, t < 3000 sec). Thus one can conclude that possible re-brightening\n(Holland & Hoversten (GCN 11081)) occurred within ~0.3-2.3 days after the\nburst. The R-band light curve can be found at\nftp://ftp.sao.ru/pub/grb/GRB100805A/GRB100805A_lc_R.jpeg\n\nThis message may be cited.",
  "circularId": 11084,
  "createdOn": 1281713409000,
  "email": "sokolov@sao.ru",
  "subject": "GRB 100805A: the 4-th epoch of SAO RAS optical observations",
  "submitter": "Vladimir Sokolov at SAO RAS  <sokolov@sao.ru>",
  "eventId": "GRB 100805A"
}