{
  "bibcode": "2010GCN.11270....1V",
  "body": "A. Volnova (SAI MASU), A. Pozanenko (IKI), E. Klunko, I. Korobtsev (ISTP) on \nbehalf of larger GRB follow up collaboration  report:\n\nWe observed the  Swift GRB 100901A (Immler  et al., GCN 11159)  with \nAZT-33IK telescope of Sayan observatory (Mondy) starting Sep. 01 (UT) \n13:44:30 and continued observations within 2 nights after burst onset. \nPreliminary light curve of Mondy observation in R as well as  R, r and \nnonfiltered observations inreported on  behalf of our follow up \ncollaboration (Klunko et al,  GCN 11162; Andreev  et al,  GCN 11166; Andreev \net al,  GCN 11168; Elenin et al,  GCN 11184;  Andreev  et al,  GCN 11191; \nAndreev  et al,  GCN 11200; Andreev  et al,  GCN 11201; Elenin et al,  GCN \n11234; Rumyantsev et al,  GCN 11255; Volnova et al,  GCN 11266) can be found \nat\nhttp://grb.rssi.ru/GRB100901A/GRB100901A_lc.png\n\nThe photometry calibration was performed against the same SDSS DR7 stars.\nThere are some distinct features of the light curve. The tail of the flare \nreported earlier (Ivanov et al, GCN 11178), the rapid increase brightness \nafter power law decay until 0.1d since trigger, the deep gap at ~0.13d, and \nthe bump at ~0.3d corresponding to the bump in XRT light curve (Page et al, \nGCN 11171). We also confirm the late break between 5 and 6 days of the \nafterglow (Kann et al,  GCN 11246; Volnova et al,  GCN 11266). \n\n[GCN OPS NOTE(10sep10):  Per author's request, the Subject line\nwas changed from 100906A to 100901A.]",
  "circularId": 11270,
  "createdOn": 1284112742000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 100901A: optical observations in Mondy and R-light curve",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 100901A"
}