{
  "bibcode": "2015GCN.17401....1S",
  "body": "T. Sakamoto (AGU), S. D. Barthelmy (GSFC),  W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL),\nM. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):\n\nUsing the data set from T-60 to T+243 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 150202A (trigger #629547)\n(Krimm, et al., GCN Circ. 17376).  The BAT ground-calculated position is\nRA, Dec = 39.261, -33.132 deg which is\n    RA(J2000)  =  02h 37m 02.6s\n    Dec(J2000) = -33d 07' 56.1\"\nwith an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 60%.\n\nThe mask-weighted light curve shows a complex structure with multiple peaks. The \nfirst emission episode runs from T-2 to T+10 sec and then second episode from \nT+12 to ~T+30 sec. T90 (15-350 keV) is 25.7 +- 4.3 sec (estimated error \nincluding systematics).\n\nThe time-averaged spectrum from T-1.7 to T+27.1 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.50 +- 0.19.  The fluence in the 15-150 keV band is 6.1 +- 0.7 x 10^-7 erg/cm2. \nThe 1-sec peak photon flux measured from T+17.40 sec in the 15-150 keV band is \n1.0 +- 0.2 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/629547/BA/",
  "circularId": 17401,
  "createdOn": 1423059575000,
  "email": "hans.a.krimm@nasa.gov",
  "subject": "GRB 150202A, Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NASA-GSFC  <hans.a.krimm@nasa.gov>",
  "eventId": "GRB 150202A"
}