{
  "bibcode": "2002GCN..1298....1G",
  "body": "J. Greiner (MPE Garching, AIP Potsdam), \nU. Thiele (MPIA Heidelberg, Calar Alto), \nS. Klose (Thueringer Landessternwarte Tautenburg), \nA.J. Castro-Tirado (LAEFF-INTA, Madrid, and IAA-CSIC, Granada) report:\n\nWe have imaged the location of GRB 020322 with the 3.5 m telescope\nat Calar Alto (Spain) for three times 10 min. between 22 Mar 2002 23:46 UT\nto 23 Mar 2002 00:09 UT at a seeing of 1.4 arcsec. Based on the same USNO\nstar at 18:00:58.03, +81:06:08.3 listed as having R=17.5 mag we measure\nthe following magnitudes for the three sources a, b, c (Bloom et al.; GCN 1296)\ninside the XMM error circle (Ehle et al.; GCN 1293):\n\n\n         Calar Alto            earlier measurement\n ---------------------------------------------------------------------\n  a   22.07 +- 0.06 mag      21.9 mag (Szentgyorgyi et al; GCN 1295)\n  b   23.80 +- 0.30 mag      23.26 +- 0.32 mag (Bloom et al.; GCN 1294)\n  c   24.50 +- 0.60 mag \n\nWhile object c is at our detection threshold, object b has clearly faded,\nas also a visual comparison with the FITS image of Bloom et al. (GCN 1296) \nshows (though the errors formally allow for constancy of source b). \nWe therefore suggest that source b is the optical counterpart of GRB 020322.",
  "circularId": 1298,
  "createdOn": 1016882037000,
  "email": "jgreiner@aip.de",
  "subject": "GRB 020322 optical observation",
  "submitter": "Jochen Greiner at Astrophys.Inst. Potsdam,Germany  <jgreiner@aip.de>",
  "eventId": "GRB 020322"
}