{
  "bibcode": "2003GCN..2329....1B",
  "body": "Howard E. Bond (Space Telescope Science Institute) reports:\n\nAs noted in (GCN #2316) the error circle of XRF 030723 was imaged with the\nSMARTS Consortium 1.3m reflector at Cerro Tololo on UT 2003 July 24.080,\n24.173, and 24.281.  An additional observation was obtained at UT 2003 July\n25.414.  R-band exposures of 3x300 sec were taken at each epoch  \n\nThe fading of the optical transient reported by Fox et al. (GCN #2323) is\nconfirmed, albeit at low S/N.  At July 24.080 the source was unfortunately\nlocated on a low-sensitivity region of the CCD.  On July 24.173 and 24.281 it\nhad R magnitudes of 21.0 and 20.9 (calibrated against a Landolt standard\nfield, but with uncertainties of at least 0.1 mag).  On July 25.414 the\ntransient had faded below detectability and was at least 1 mag fainter than on\nthe previous night.\n\nI thank Rebeccah Winnick, David Gonzalez, and Juan Espinoza for arranging and\nexecuting the observations on very short notice.",
  "circularId": 2329,
  "createdOn": 1059242243000,
  "email": "bond@stsci.edu",
  "subject": "XRF 030723: confirmation of fading optical counterpart",
  "submitter": "Howard E Bond at STScI  <bond@stsci.edu>"
}