{
  "bibcode": "2010GCN.11391....1K",
  "body": "T. Kruehler, P. Schady, and J. Greiner (all MPE Garching)  report on\nbehalf of the GROND team:\n\nGROND (Greiner et al. 2008, PASP 120, 405), mounted at the 2.2m MPG/ESO\ntelescope at LaSilla Observatory (Chile), performed automated follow-up\nobservations of GRB 101030A (Melandri et al., GCN #11386) as soon as the\nfield rose above the pointing constraints of the telescope. Imaging was\nperformed simultaneously in g'r'i'z'JHK starting at 08:12 UT on\n2010-10-31, which is 16.3 h after the burst. Inside the enhanced XRT error\ncircle (Evans et al., GCN# 11387), GROND detects a single object at:\n\nRA (J2000)= 11:05:31.68\nDec (J2000)= -16:22:41.1\n\nwith uncertainties of 0.3\" in each coordinate.\n\nPreliminary AB magnitudes and upper limits in stacked images of 15 min\nintegration time in each g'r'i'z' and 20 min in JHK at a midtime of 08:46\nUT are:\n\ng' = 22.9 +- 0.3\nr' = 22.4 +- 0.1\ni' = 22.0 +- 0.1\nz' = 22.1 +- 0.2\nJ = 21.7 +- 0.4\nH > 21.2\nK > 20.5\n\nwhich have been tied to SDSS and 2MASS field stars. No statement about\nvariability can be made at this point. No source is reported at this\nlocation in the SDSS, which is somewhat deeper than the object's\nmagnitudes, and hence we suggest this source is the optical/NIR afterglow\nof GRB101030A.\n\nWe thank the ESO staff at LaSilla observatory, and in particular P. Arias,\nfor their excellent support and assistance with the observations.",
  "circularId": 11391,
  "createdOn": 1288554187000,
  "email": "kruehler@mpe.mpg.de",
  "subject": "GRB 101030A: GROND optical/NIR afterglow candidate",
  "submitter": "Thomas Kruehler at MPE/MPI  <kruehler@mpe.mpg.de>",
  "eventId": "GRB 101030A"
}