{
  "bibcode": "2007GCN..7090....1S",
  "body": "Stefano Sposetti (Gnosca, Switzerland) reports to the AAVSO\nInternational High Energy Network the following optical observations of\nGRB071112C (GCN #7059, Perri et al.):\n\nStefano Sposetti reports the detection of the optical afterglow of\nGRB071112C (Perri et al., GCN 7059, and several subsequent reports). \nThe afterglow was observed unfiltered for 2700 seconds, using a\n0.4-meter Newtonian with an SBIG ST8XE CCD and no filter.  Observations\ncommenced approximately 4 hours and 10 minutes post BAT detection; the\nmidpoint of the observational sequence was 2007 November 12.9625 UT. The\nafterglow was detected at an unfiltered magnitude of 21.0 +/- 0.5,\ncalibrated relative to USNO-A2.0.  This magnitude is consistent with the\nreported detection by Greco et al. (GCN #7089) on November 12.929 UT at\nRc = 21 +/- 0.2.\n\nA detailed report on these observations is available on the AAVSO website\nat ftp://ftp.aavso.org/grb/StefanoSposetti_GRB071112C_2454419.20588_.txt\n\nA fits image is available at\nftp://ftp.aavso.org/grb/StefanoSposetti_GRB071112C_2454419.20588_.fits\n\nThe AAVSO thanks the Curry Foundation for their continued support of the\nAAVSO International High Energy Network.",
  "circularId": 7090,
  "createdOn": 1195069518000,
  "email": "matthewt@aavso.org",
  "subject": "GRB 071112C: optical observation",
  "submitter": "AAVSO GRB Network at AAVSO  <matthewt@aavso.org>",
  "eventId": "GRB 071112C"
}