{
  "bibcode": "2012GCN.14123....1K",
  "body": "H. A. Krimm (GSFC/USRA),S. D. Barthelmy (GSFC),\nW. H. Baumgartner (GSFC/UMBC),J. R. Cummings (GSFC/UMBC),\nN. Gehrels (GSFC),C. B. Markwardt (GSFC),D. M. Palmer (LANL),\nT. Sakamoto (AGU), E. Sonbas (NASA/GSFC/Adiyaman Univ.),\nM. Stamatikos (OSU),J. Tueller (GSFC),T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-60 to T+243 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 121229A (trigger #544347)\n(Sonbas, et al., GCN Circ. 14115).  The BAT ground-calculated position is\nRA, Dec = 190.095, -50.588 deg which is\n    RA(J2000)  =  12h 40m 22.7s\n    Dec(J2000) = -50d 35' 16.9\"\nwith an uncertainty of 2.8 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 39%.  The mask-weighted light curve shows a broad\nstructure beginning at least at T-60 seconds and lasting until T+60 sec.\nSince there is no data from before the start of the burst, T90 cannot be\naccurately calculated at this time.  It is approximately 100 seconds.\n\nThe time-averaged spectrum from T+0.00 to T+64.00 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n2.43 +- 0.46.  The fluence in the 15-150 keV band is 4.6 +- 1.3 x 10^-7erg/cm2.\nThe 1-sec peak photon flux measured from T+0.00 sec in the 15-150 keV band\nis 0.1 +- 0.0 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/544347/BA/",
  "circularId": 14123,
  "createdOn": 1356834785000,
  "email": "hans.a.krimm@nasa.gov",
  "subject": "GRB 121229A, Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NASA-GSFC  <hans.a.krimm@nasa.gov>",
  "eventId": "GRB 121229A"
}