{
  "bibcode": "2010GCN.10842....1D",
  "body": "V. Dhillon (U. Sheffield), R. Mignani (MSSL), S. Schulze (U. Iceland),\nA. J. Levan (U. Warwick), N. R. Tanvir (U. Leicester), A. de Cia (U. \nIceland) report on behalf of the ULTRACAM collaboration:\n\nWe observed the field of GRB 100615A (D'Elia et al., GCN 10841) with \nULTRACAM (Dhillon et al., MNRAS, 2007, 378, 825) mounted on the 3.5-m NTT \ntelescope on La Silla, beginning approximately 17 mins post-burst.\n\nStacking the images from 02:16:27 to 02:39:29 UT did not reveal any new\nsource down to 24 mag (3 sigma) in the i' band.\n\nThe deep limiting magnitude at early times, coupled with bright X-ray\nafterglow with moderate hydrogen column density (D'Elia et al. GCN 10841)\nis suggestive of a highly extinguished burst.",
  "circularId": 10842,
  "createdOn": 1276575270000,
  "email": "nrt@ast.cam.ac.uk",
  "subject": "GRB 100615A: NTT/Ultracam imaging",
  "submitter": "Nial Tanvir at IofA U.Cambridge  <nrt@ast.cam.ac.uk>",
  "eventId": "GRB 100615A"
}