{
  "bibcode": "2006GCN..4663....1G",
  "body": "D. Grupe (PSU), S. Barthelmy (GSFC), D. Burrows (PSU),\nA. Cucchiara (PSU), J. Cummings (GSFC/NRC), N. Gehrels (GSFC),\nS. Hunsberger (PSU), J. Kennea (PSU), C. Markwardt (GSFC/UMD),\nF. Marshall (GSFC), D. Morris (PSU), D. Palmer (LANL), T. Sakamoto (GSFC)\non behalf of the Swift team:\n\nAt 20:33:43 UT, Swift-BAT triggered and located GRB 060204C (trigger=180274).\nThe spacecraft slewed immediately.  The BAT on-board calculated location is\nRA,Dec 92.727d,+70.171d {06h 10m 54s,+70d 10' 14\"} (J2000), with an\nuncertainty of 3 arcmin (radius, 90% containment, stat+sys).\nThis is a 64-sec image trigger, and as such, there is little that can be\ndetermined from the TDRSS lightcurve.\n\nThe S/C slewed immediately and the XRT began taking data at 20:36:19 UT, \n157 sec after the BAT trigger.  The XRT on-board centroid algorithm did not \nconverge and no prompt position is available, however, the XRT \nlightcurve suggests the possibility of a decaying source in the field of view.\nWe are waiting for down-linked data to determine the presence of the source.\n\nUVOT took a finding chart exposure of nominal 200 seconds with the V filter\nstarting 156 seconds after the BAT trigger.  No afterglow candidate\nhas been found in the initial data products.  Image catalog data\nare not available at this time.  The 8'x8' region for the list of sources\ngenerated on-board covers 100% of the BAT error circle.  The list\nof sources is typically complete to about 18.0 mag.  No correction\nhas been made for the expected extinction of about 0.6 magnitudes.\nNo afterglow candiate was found in a second B finding chart taken\nat T+363 sec.\n\nGiven that the star tracker had been out-of-lock for only 2 minutes prior\nto this trigger, it is very unlikely there is a problem with the attitude\nof this position solution, so we believe this location to be valid.",
  "circularId": 4663,
  "createdOn": 1139088636000,
  "email": "Scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 060204C: Swift-BAT detection of a burst",
  "submitter": "Scott Barthelmy at NASA/GSFC  <Scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 060204C"
}