{
  "bibcode": "2011GCN.12417....1N",
  "body": "M. Nardini (Uni. Milano-Bicocca), J. Greiner (MPE Garching) and\nT. Kruehler (DARK), report on behalf of the GROND team:\n\nWe observed the field of the GRB 111905A (Saxton et al., GCN 12413)\nstarting 2011 October 5 at 23:25 UT (15.3hr post trigger) simultaneously \nin JHKs with GROND (Greiner et al. 2008, PASP 120, 405) mounted at\nthe 2.2m MPI/ESO telescope at La Silla Observatory (Chile).\nObservations were performed during twilight (with the Sun just 10 deg below\nthe horizon) before the target was going to set, at an average airmass\nof 2.5 and seeing of 2\".\n\nWith an exposure time of  240s seconds in JHKs we do not identify any \nnew source within the BAT error circle (Barthelmy et al., GCN 12415)\nrelative to 2MASS.\n\nIn particular, we do not find any new point source within or near the \ngalaxy ESO 580-49 mentioned by Levan et al. (GCN 12414).\n\nOur 3 sigma limiting magntiudes (AB system) are:\n\nJ  < 19.8\nH  < 19.3\nKs < 18.7\n\nwhile the limits for an afterglow brighter than the corresponding\n2MASS limits (transformed to AB mag) are\n\nJ < 16.7, \nH < 16.5 and \nKs< 16.0 mag\n\nin agreement with Levan et al. (GCN 12416).\n\nThe given GROND magnitudes are calibrated against 2MASS field stars.",
  "circularId": 12417,
  "createdOn": 1317890600000,
  "email": "jcg@mpe.mpg.de",
  "subject": "GRB 111005A: GROND NIR observations",
  "submitter": "Jochen Greiner at MPI  <jcg@mpe.mpg.de>",
  "eventId": "GRB 111005A"
}