{
  "bibcode": "2005GCN..3055....1M",
  "body": "T. Mitani (ISAS), L. Barbier, S. Barthelmy, J. Cannizzo, J. Cummings (GSFC), \nM. Chester (PSU), E. Fenimore, M. Galassi (LANL), N. Gehrels (GSFC), \nD. Hullinger (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), \nF. Marshall (GSFC), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC), \nG. Sato (ISAS), M. Suzuki (Saitama), T. Takahashi (ISAS), F. Tamburelli (ASDC), M. Tashiro (Saitama), J. Tueller (GSFC)\n\n\nAt 03:09:06 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated on-board GRB050223.  Because of the Earth-limb constraint,\nthe spacecraft could not immediately slew to the burst location.\nThe location became unconstrained at T+35 min, and the spacecraft slewed.\nThe XRT and UVOT instruments then began their standard set of pre-programmed\nobserving sequences.\n\nUsing the time interval of the burst, the ground-calculated location\nis RA, Dec 271.390, -62.481 (J2000) with an uncertainty of 4 arcmin\n(radius, including a systematic uncertainty, 90% containment).\nThe burst was 36 degrees off the BAT boresight (70% encoding).\n\nThe burst lightcurve has several small, short peaks on top of a slow rise \nand fall with a T90 duration of ~23 sec (and T50 is 10 sec). The \npeak flux is 0.8 ph/cm2/sec for a 1-sec interval (15-350 keV).  Using \na simple power law model, the fluence is 7.4 e-7 erg/cm^2 (15-350 keV).",
  "circularId": 3055,
  "createdOn": 1109138082000,
  "email": "jayc@milkyway.gsfc.nasa.gov",
  "subject": "GRB 050223 Swift/BAT detection of a burst",
  "submitter": "Jay R. Cummings at NASA/GSFC/Swift  <jayc@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 050223"
}