{
  "bibcode": "2014GCN.17239....1B",
  "body": "S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), P. D'Avanzo (INAF-OAB), N. Gehrels (GSFC),\nH. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU),\nT. N. Ukwatta (LANL) (i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 141225A (trigger #622476)\n(D'Avanzo, et al., GCN Circ. 17229).  The BAT ground-calculated position is\nRA, Dec = 138.754, 33.774 deg which is\n    RA(J2000)  =  09h 15m 01.1s\n    Dec(J2000) = +33d 46' 27.7\"\nwith an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 26%.\n\nThe burst location first entered the BAT field of view at ~T-40 sec, during a\npre-planned slew.  The mask-weighted light curve shows a single FRED-shaped\npeak, beginning at T+5 sec, peaking at T+12 sec and returning to baseline level\nby T+50 sec.  T90 (15-350 keV) is 40.24 +- 7.04 sec sec (estimated error \nincluding systematics).\n\nThe time-averaged spectrum from T+5.50 to T+50.68 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.32 +- 0.15.  The fluence in the 15-150 keV band is 2.5 +- 0.2 x 10^-6 erg/cm2. \nThe 1-sec peak photon flux measured from T+11.76 sec in the 15-150 keV band is \n1.3 +- 0.4 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/622476/BA/",
  "circularId": 17239,
  "createdOn": 1419604198000,
  "email": "hans.a.krimm@nasa.gov",
  "subject": "GRB 141225A: Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NASA-GSFC  <hans.a.krimm@nasa.gov>",
  "eventId": "GRB 141225A"
}