{
  "bibcode": "2015GCN.18612....1D",
  "body": "A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), A. Sota (IAA-CSIC), \nand C. Thoene (IAA-CSIC) report:\n\nWe observed the field of GRB 151118A (Amaral-Rogers et al. GCN 18611) \nwith the 1.5 m OSN telescope in Granada (Spain), starting at 03:17:55 UT \n(11.42 min after the GRB onset). Observations consisted of 7x300 s \nexposures in I-band. No new source is detected within the XRT error box. \nThe 3-sigma limiting magnitudes of the individual exposures, and the combined\nframes are I(Vega) = 21.5 mag, and I(Vega) = 22.5 mag, respectively. The mean\ntime of the combined exposure is 03:37:49 (31.32 min after the burst). Photometry\nwas obtained by comparison with stars from the USNO-B1.0 catalogue.",
  "circularId": 18612,
  "createdOn": 1447821411000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 151118A: Optical observations from OSN",
  "submitter": "Antonio de Ugarte Postigo at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 151118A"
}