{
  "subject": "GRB 231215A: Swift-BAT refined analysis",
  "body": "S. D. Barthelmy (GSFC), P. D'Avanzo (INAF-OAB), H. A. Krimm (NSF),\nS. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC),\nM. Moss (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC/UMBC),\nT. Sakamoto (AGU), M. Stamatikos (OSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 231215A (trigger #1202522)\n(D'Avanzo, et al., GCN Circ. 35343).  The BAT ground-calculated position is\nRA, Dec = 9.730, 57.634 deg which is\n   RA(J2000)  =  00h 38m 55.1s\n   Dec(J2000) = +57d 38' 00.8\"\nwith an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 6%.\n The mask-weighted light curve shows a structure of several overlapping pulses.\nThe emission starts from T-10 s, peaks at T0 and ends at T+20 s.\nT90 (15-350 keV) is 20.75 +- 3.69 sec (estimated error including systematics).\n The time-averaged spectrum from T-7.04 to T+19.79 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.01 +- 0.09.  The fluence in the 15-150 keV band is 1.0 +- 0.1 x 10^-5 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.18 sec in the 15-150 keV band\nis 9.6 +- 1.4 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel.\n The results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1202522/BA/\n\n",
  "eventId": "GRB 231215A",
  "circularId": 35386,
  "bibcode": "2023GCN.35386....1B",
  "createdOn": 1702789148355,
  "submitter": "Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>",
  "submittedHow": "email-legacy"
}