{
  "bibcode": "2012GCN.13120....1B",
  "body": "S. D. Barthelmy (GSFC), T. Sakamoto (GSFC/UMBC), C. B. Markwardt (GSFC),\nW. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL),\nN. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), D. M. Palmer (LANL),\nG. Sato (ISAS), M. H. Siegel (PSU), M. Stamatikos (OSU),\nJ. Tueller (GSFC), T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 120326A (trigger #518626)\n(Siegel, et al., GCN Circ. 13105).  The BAT ground-calculated position is\nRA, Dec = 273.906, 69.248 deg, which is \n   RA(J2000)  =  18h 15m 37.3s \n   Dec(J2000) = +69d 14' 54.4\" \nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 91%.\n \nThe mask-weighted light curve shows a possible (2-sigma) precursor peak\nat ~T-105 sec, and two definite precursor peaks (~30 sec wide each) at ~T-60 sec\nand ~T-25 sec.  The main FRED peak starts T_0, peaks at ~T+4 sec, and\nreturns to background at ~T+20 sec.  T90 (15-350 keV) is 69.6 +- 8.3 sec\n(estimated error including systematics).\n \nThe time-averaged spectrum from T-67.90 to T+22.56 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 1.41 +- 0.34, \nand Epeak of 41.1 +- 6.9 keV (chi squared 55.8 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 2.6 +- 0.3 x 10^-6 erg/cm2\nand the 1-sec peak flux measured from T+3.59 sec in the 15-150 keV band is\n4.6 +- 0.2 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 2.06 +- 0.07 (chi squared 68.4 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/518626/BA/",
  "circularId": 13120,
  "createdOn": 1332785041000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 120326A: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 120326A"
}