{
  "bibcode": "2013GCN.14628....1I",
  "body": "M. Im (CEOU/SNU), H.-I. Sung (KASI), & Y. Urata (NCU)\non behalf of a larger collaboration\n\nWe observed GRB 130511A (Krimm et al., GCN 14620) \nin BVRI filters using a 0.6m telescope at the Sobaeksan\nOptical Astronomy Observatory (SOAO), starting at 76min \nafter the BAT alert.\n\nIn stacked images of 6 x 300sec exposures, we identify\nthe optical afterglow with the following magnitude\n(Cucchiara et al. GCN 14621; Takaki et al. GCN 14626),\ncalibrated against a USNO-B1 star in the vicinity.\n\n   T(mid, UT)         Mag\n05-11 13:50:12     R=20.78 +- 0.13\n\nThe afterglow is detected in the other bands, but at\na lower S/N.\n\nWe thank the staffs at SOAO for performing the observation.",
  "circularId": 14628,
  "createdOn": 1368371818000,
  "email": "mim@astro.snu.ac.kr",
  "subject": "GRB130511A: SOAO Optical Observation",
  "submitter": "Myungshin Im at Seoul Nat U  <mim@astro.snu.ac.kr>",
  "eventId": "GRB 130511A"
}