{
  "bibcode": "2006GCN..5429....1M",
  "body": "D. Mart�nez and A. J. Castro-Tirado (IAA-CSIC Granada), on behalf\nof a larger collaboration, \n\nreport:\n\n\"Following the detection by the IPN of the bright GRB 060805B\n(Hurley et al. GCNC 5407), we have obtained I-band frames with \nthe 1.5m OSN telescope in Spain starting on Aug 8.04 UT (i.e. \n58.3 hr post-burst). Six exposures (300s each) in the I-band \nfilter were taken under non optimum technical conditions.  \nWithin the Swift/XRT X-ray afterglow error box (Butler GCNC 5414, \nGodet et al. GCNC 5428), we only detect a single optical source \nwhich is also present in the DSS2 with about the same brightness. \nThe limiting magnitude of our combined I-band image is I = 20.5\".",
  "circularId": 5429,
  "createdOn": 1155139258000,
  "email": "ajct@iaa.es",
  "subject": "GRB 060805B: optical observation at Sierra Nevada",
  "submitter": "Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct@iaa.es>",
  "eventId": "GRB 060805B"
}