{
  "bibcode": "2000GCN...660....1Y",
  "body": "S. Yost, A. Diercks, F. Harrison, R. Gal, V. Hradecky, D. Kaplan,\nA. Mahabal, P. Mao (Caltech) report:\n\n\"We imaged the entire error circle of GRB000424 (Piro, GCN #644) with the \nCCD 13 instrument on the Palomar 60\" telescope on two consecutive nights.\nExposures consisted of R-band 6x600s on April 27.17 UT and 7x600s on April\n28.19 UT with seeing of approximately 1.5\" and 1\" respectively.\nSubtraction of the two epochs reveals no variable candidates to the\ndetection limit of approximately R ~ 22.8 (field calibration by comparison\nwith USNO data).\"\n \nThis message may be cited.",
  "circularId": 660,
  "createdOn": 957286299000,
  "email": "yost@srl.caltech.edu",
  "subject": "GRB000424, optical observations",
  "submitter": "Sarah Yost at Caltech  <yost@srl.caltech.edu>",
  "eventId": "GRB 000424"
}