{
  "bibcode": "2011GCN.12082....1K",
  "body": "H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), A. Rowlinson (U Leicester), T. Sakamoto (GSFC/UMBC),\nM. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-240 to T+302 sec from the recent telemetry downlink,\nwe report further analysis of event from SGR 1E 1841-045 (trigger #455904)\n(Rowlinson, et al., GCN Circ. 12079).  The BAT ground-calculated position is\nRA, Dec = 280.329, -4.934 deg, which is \n   RA(J2000)  =  18h 41m 19.0s \n   Dec(J2000) = -04d 56' 00.9\" \nwith an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 18%.\n \nThe mask-weighted light curve shows a single spike that starts at ~T_zero\nand ends at ~T+0.04 sec.  T90 (15-350 keV) is 0.020 +- 0.009 sec\n(estimated error including systematics).\n \nThe time-averaged spectrum from T-0.0 to T+0.1 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 0.04 +- 0.91, \nand Epeak of 32.8 +- 4.7 keV (chi squared 43.0 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 1.6 +- 0.2 x 10^-7 erg/cm2\nand the 1-sec peak flux measured from T-0.43 sec in the 15-150 keV band is\n3.6 +- 0.5 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 2.68 +- 0.15 (chi squared 85.2 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/455904/BA/",
  "circularId": 12082,
  "createdOn": 1308852740000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "SGR 1E 1841-045: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>"
}