{
  "bibcode": "2005GCN..3581....1F",
  "body": "A. Falcone (PSU), D. Palmer (LANL), A. Blustin (MSSL), S. Barthelmy\n(GSFC), J. Cummings (GSFC/NRC), H. Krimm (GSFC/USRA), D. Burrows, D.\nMorris, C. Gronwall (PSU), C. Markwardt (GSFC/UMD), K. Page\n(Leicester), N. Gehrels (GSFC)\n\nAt 04:29:02.39 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated on-board GRB050713 (trigger=145675).  The spacecraft slewed\nimmediately and was on target at approximately 70 seconds. The\nflight-determined location is RA,Dec 320.536,+77.072 {+21h 22m 09s, +77d\n04' 20\"} (J2000) with an uncertainty of 3 arcmin (radius, stat+sys).\nThis is a bright burst with a peak count rate of 6000 cts/sec in the\n15-350 keV band.  The brightest part of the burst duration is ~20\nseconds, followed by smaller peaks at T+50, T+65 and T+105 seconds.\n\nThe spacecraft slewed immediately and the XRT began observing the burst\nat 04:30:14.9 UT (72.6 s after the BAT trigger).  XRT found a very\nbright, uncataloged, fading X-ray source at:\n\nRA:   +21h 22m 09.6s (J2000),\nDEC: +77d 04' 30.3\" (J2000).\n\nThis position is 11 arcseconds from the BAT position.  The estimated\nuncertainty is 6 arcseconds radius (90% containment).\n\nThe Swift Ultra Violet/Optical Telescope (UVOT) observations began at\n04:30:17.7 UT, 75 seconds after the BAT trigger.  The first data taken\nafter the spacecraft settled was a 100 sec exposure using the V filter\nwith the midpoint of the observation at 125 sec after the BAT trigger.\nBased on comparisons to the DSS and USNO, we detect no new source at the\nXRT position. The 3-sigma upper limit in the V-filter is approximately\n17.81 mag.",
  "circularId": 3581,
  "createdOn": 1121232694000,
  "email": "afalcone@astro.psu.edu",
  "subject": "GRB 050713: Swift detection of Bright Burst",
  "submitter": "Abe Falcone at PSU/Swift  <afalcone@astro.psu.edu>",
  "eventId": "GRB 050713"
}