{
  "bibcode": "2014GCN.15812....1P",
  "body": "D. M. Palmer (LANL), S. D. Barthelmy (GSFC),  W. H. Baumgartner (GSFC/UMBC),\nS. B. Cenko (GSFC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC),\nH. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC),\nT. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC),\nT. N. Ukwatta (MSU) (i.e. the Swift-BAT team):\n\nUsing the data set from T-61 to T+243 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 140209A (trigger #586071)\n(Cenko, et al., GCN Circ. 15808).  The BAT ground-calculated position is\nRA, Dec = 81.328, 32.488 deg which is\n    RA(J2000)  =  05h 25m 18.7s\n    Dec(J2000) = +32d 29' 17.3\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 38%.\n\nThe mask-weighted light curve shows an initial weak pulse from T+0 to T+0.5 sec, \nfollowed by the main pulse from T+1.5 to T+3.5 sec, with a FRED-like profile \nwith some superimposed structure.  This is followed by some low-level\nextended emission out to ~T+50 sec.  T90 (15-350 keV) is 21.3 +- 8.0 sec \n(estimated error including systematics).\n\nThe time-averaged spectrum from T+0.15 to T+29.22 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.44 +- 0.06.  The fluence in the 15-150 keV band is 4.1 +- 0.2 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+1.69 sec in the 15-150 keV band\nis 38.1 +- 1.1 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel.\n\nIt is possible that this burst falls in the category of short burst with \nextended emission.\nA lag analysis is underway that will be reported in a subsequent circular.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/586071/BA/",
  "circularId": 15812,
  "createdOn": 1391974061000,
  "email": "hans.a.krimm@nasa.gov",
  "subject": "GRB 140209A, Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NASA-GSFC  <hans.a.krimm@nasa.gov>",
  "eventId": "GRB 140209A"
}