{
  "bibcode": "2005GCN..3856....1H",
  "body": "D. Hullinger (UMD), L. Angelini (GSFC-JHU), L. Barbier (GSFC),\nS. Barthelmy (GSFC), M. Chester (PSU), J. Cummings (GSFC/NRC),\nE. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA),\nC. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC),\nT. Sakamoto (GSFC/NRC), G. Sato (ISAS), J. Tueller (GSFC),\non behalf of the Swift-BAT team:\n\nUsing the full data set from the recent telemetry downlink, we report\nfurther analysis of Swift-BAT GRB 050822 (trigger #151486)\n(Blustin, et al., GCN 3849).  The refined BAT ground position\nis (RA,Dec) = 51.098, -46.031 {03:24:19.2, -46:01:22.8} [deg; J2000]\n+-2 arcmin, (90% containment).  This is 27 arc-seconds from the\nXRT position reported in GCN 3849.  The partial coding was 44%.\n\nThe light curve has two main peaks.  The first peak starts from\nT0-4 sec, peaking at T0, and then ending at T0+20 sec with a gradual\ndecay.  The second peak contains multiple sub-peaks.  It starts\nfrom T0+20 sec and ends at T0+75 sec.  There is a smaller, somewhat\nsofter peak from T+100 to T+104 seconds while Swift was pointing at\nthe source and the  XRT was taking data.  T90 (15-350 keV) is (102 +- 2)\nseconds (estimated error including systematics).\n\nThe power law index of the time-averaged spectrum is 2.5 +- 0.1.\nThus, the time-averaged spectrum turns out to be soft.\nThe fluence in the 15-350 keV band is (3.4 +- 0.3) x 10^-6 erg/cm2.\nThe 1-s peak photon flux measured from T0+47.6 second in the 15-350 keV\nband is (2.9 +- 0.3) ph/cm2/s.  All the quoted errors are at the 90%\nconfidence level.",
  "circularId": 3856,
  "createdOn": 1124732821000,
  "email": "takanori@milkyway.gsfc.nasa.gov",
  "subject": "GRB 050822: Swift-BAT refined analysis",
  "submitter": "Takanori Sakamoto at NASA/GSFC  <takanori@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 050822"
}