{
  "body": "H. A. Krimm (NSF), S. D. Barthelmy (GSFC),\nP. D'Avanzo (INAF-OAB), S. Laha (GSFC/UMBC),\nA. Y. Lien (U Tampa), C. B. Markwardt (GSFC),\nM. J. Moss (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC), T. Sakamoto (AGU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-60 to T+243 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 240222A (trigger #1216804)\n(D'Avanzo et al., GCN Circ. 35770).  The BAT ground-calculated position is\nRA, Dec = 143.209, -68.034 deg which is\n   RA(J2000)  =  09h 32m 50.2s\n   Dec(J2000) = -68d 02' 03.7\"\nwith an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 94%.\n\nThe mask-weighted light curve shows a main pulse that starts\nat ~T-0.4 s, peaks at ~T0, and ends at ~T+1.4 s. In addition,\nthere is a small precursor pulse at ~T-2.7 s. T90 (15-350 keV)\nis 3.94 +- 2.35 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-2.70 to T+1.37 sec is best fit\nby a simple power-law model.  The power law index of the time-averaged\nspectrum is 0.75 +- 0.23.  The fluence in the 15-150 keV band\nis 2.5 +- 0.3 x 10^-7 erg/cm2. The 1-sec peak photon flux measured\nfrom T-0.20 sec in the 15-150 keV band is 1.3 +- 0.2 ph/cm2/sec.\nAll the quoted errors are at the 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttps://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1216804/\n",
  "bibcode": "2024GCN.35781....1K",
  "createdOn": 1708660290719,
  "submitter": "Amy <yarleen@gmail.com>",
  "subject": "GRB 240222A: Swift-BAT refined analysis",
  "circularId": 35781,
  "eventId": "GRB 240222A",
  "submittedHow": "email"
}