{
  "bibcode": "2012GCN.13480....1B",
  "body": "S. D. Barthelmy (GSFC), T. Sakamoto (GSFC/UMBC)\n(on behalf of the Swift-BAT team):\n \nUsing the data set from T-119 to T+183 sec from recent telemetry downlinks,\nwe report further analysis of 1E 1841-045 (aka Kes 73) (trigger #526660)\n(Barthelmy, et al., GCN Circ. 13475).  The BAT ground-calculated position is\nRA, Dec = 280.374, -4.923 deg which is \n   RA(J2000)  =  18h 41m 29.8s \n   Dec(J2000) = -04d 55' 23.4\" \nwith an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 44%.\n \nThe mask-weighted light curve shows a singple spike (possibly 2 overlapping spikes)\nstarting at ~T-0.008 and ending at ~T+0.012 sec.  T90 (15-350 keV) is 0.012 +- 0.006 sec\n(estimated error including systematics).\n \nThe time-averaged spectrum from T-0.008 to T+0.012 sec fit by a simple\npower-law model shows the power law index of 2.66 +- 0.40 (chi squared 50.1 for 57 d.o.f.).\nThe fluence in the 15-150 keV band is 1.2 +- 0.3 x 10^-8 erg/cm2.\nA single blackbody fit to the time-averaged spectrum shows the blackbody\ntemperature of 8.77 +- 1.67 keV (chi squared 40.8 for 59 d.o.f.).\nAll the quoted errors are at the 90% confidence level. \n \nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/526660/BA/\n\nWe note the previous activity of this source: Swift BAT triggers 456505\non 02 Jul 2011 (GCN 12103 & 12104), 455904 on 23 Jun 2011 (GCN 12079 & 12082), and\n445776 on 11 Feb 2011 (GCN 11673).",
  "circularId": 13480,
  "createdOn": 1342360010000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>"
}