{
  "bibcode": "2010GCN.10417....1B",
  "body": "S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),\nE. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),\nC. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC),\nM. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU),\nL. Vetere (PSU) (i.e. the Swift-BAT team):\n \nUsing the data set from T-61 to T+242 sec from recent telemetry downlinks,\nwe report further analysis of BAT GRB 100213B (trigger #412220)\n(Vetere, et al., GCN Circ. 10412).  The BAT ground-calculated position is\nRA, Dec = 124.320, 43.464 deg which is \n   RA(J2000)  =  08h 17m 16.8s \n   Dec(J2000) = +43d 27' 51.7\" \nwith an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 56%.\n \nThe mask-weighted light curve shows a FRED-like pulse starting at ~T-5 sec,\npeaking at ~T+5 sec, and ending at ~T+150 sec.  Because the burst goes out\nof the BAT FOV at T+250 sec (due to an observing constraint), we can not tell\nif there if any detectable activity past T+250 sec.  T90 (15-350 keV) is\n48.0 +- 16.0 sec (estimated error including systematics).\n \nThe time-averaged spectrum from T-12.7 to T+35.3 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 1.13 +- 0.61, \nand Epeak of 39.1 +- 8.8 keV (chi squared 58.8 for 56 d.o.f.).  The 1-sec\npeak flux measured from T+10.76 sec in the 15-150 keV band is\n0.5 +- 0.2 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 2.04 +- 0.13 (chi squared 67.0 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/412220/BA/",
  "circularId": 10417,
  "createdOn": 1266126993000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 100213B: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 100213B"
}