{
  "bibcode": "2005GCN..3787....1F",
  "body": "Derek B. Fox (Penn State) and S. Bradley Cenko (Caltech) report on\nbehalf of a larger collaboration:  \n\n\"The Robotic 60-inch Telescope at Palomar Observatory (P60) responded\nautomatically to Swift Trigger 150139, recording a series of images\nbeginning at 06:50:30 UT, approximately 6 minutes after the burst.\n\nVisual inspection of these images does not reveal any new objects by\ncomparison to the second-generation DSS images (XDSS).  Times and\napproximate limits (calibrated against USNO-B1.0 catalog photometry)\nfor new point sources within the BAT error circle are as follows:\n\n    Band    Exp     Epoch       Limit\n   ==========================================\n      R     60s     06:51:00   R > 18.3 mag\n      i     60s     06:53:22   I > 17.0 mag\n      R     3x60s   06:58:18   R > 18.9 mag\n   ==========================================\n\nObservations will continue as long as the source is visible.\"",
  "circularId": 3787,
  "createdOn": 1123919495000,
  "email": "derekfox@astro.caltech.edu",
  "subject": "GRB050813 (Swift 150139): P60 Observations",
  "submitter": "Derek Fox at CIT  <derekfox@astro.caltech.edu>",
  "eventId": "GRB 050813"
}