{
  "bibcode": "2012GCN.12968....1C",
  "body": "J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nE. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC),\nG. Sato (ISAS), M. Stamatikos (OSU), C. A. Swenson (PSU),\nJ. Tueller (GSFC), T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-239 to T+963 sec from recent telemetry downlinks,\nwe report further analysis of BAT GRB 120219A (trigger #515375)\n(Swenson, et al., GCN Circ. 12964).  The BAT ground-calculated position is\nRA, Dec = 129.862, 51.006 deg, which is \n   RA(J2000)  =  08h 39m 26.8s \n   Dec(J2000) = +51d 00' 21.4\" \nwith an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 77%.\n \nThe mask-weighted light curve shows two slightly overlapping peaks starting\nat ~T-15 sec, peaking at T+0 and T+70 sec, and returning to baseline\nat ~T+140 sec.  T90 (15-350 keV) is 90.5 +- 10.9 sec (estimated error\nincluding systematics).\n \nThe time-averaged spectrum from T-7.83 to T+90.06 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index -0.60 +- 1.69, \nand Epeak of 51.6 +- 14.2 keV (chi squared 54.9 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 5.4 +- 1.4 x 10^-7 erg/cm2\nand the 1-sec peak flux measured from T-2.30 sec in the 15-150 keV band is\n0.3 +- 0.1 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 1.56 +- 0.23 (chi squared 63.9 for 57 d.o.f.).  All the quoted errors\nare at the 90% confidence level. \n \nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/515375/BA/",
  "circularId": 12968,
  "createdOn": 1329705114000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 120219A: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 120219A"
}