{
  "bibcode": "2002GCN..1336....1H",
  "body": "Revised Photometry of the Optical Afterglow of GRB 020405\n\n\nJ. Hjorth (U. Copenhagen) reports:\n\nThe calibration of the PSF photometry reported in GCN #1329 relied on a\nmisidentification of the USNO A2.0 star 0525_16813005 with 0525_16812476.\nCalibration to 0525_16813005 yields R = 19.8 and B - R = 1.0 at April 6.21 UT,\nconsistent with the reports of Palazzi et al. (GCN #1328), Price et al.\n(GCN #1333), and Gal-Yam et al. (GCN #1335). The systematic error in these\nvalues is of the order of +- 0.3 mag. I apologize for the impact this error\nmay have had on follow-up strategies and thank Javier Gorosabel and Paul Price\nfor pointing out the problem.\n\nAdditional data taken with the DK1.5m between Apr 7.13 and Apr 7.37 confirm\nthe continued fading of the source. A careful analysis of these data is in\nprogress!",
  "circularId": 1336,
  "createdOn": 1018184871000,
  "email": "jens@astro.ku.dk",
  "subject": "Revised Photometry of the Optical Afterglow of GRB 020405",
  "submitter": "Jens Hjorth at U.Copenhagen  <jens@astro.ku.dk>",
  "eventId": "GRB 020405"
}