{
  "bibcode": "2022GCN.31486....1P",
  "body": "T. Parsotan (GSFC/UMBC), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nA. Y. Lien (U Tampa), C. B. Markwardt (GSFC),\nA. Melandri (INAF-OAB), D. M. Palmer (LANL),\nT. Sakamoto (AGU), M. Stamatikos (OSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+717 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 220117B (trigger #1093611)\n(Melandri et al., GCN Circ. 31468).  The BAT ground-calculated position is\nRA, Dec = 191.989, -28.762 deg which is\n   RA(J2000)  =  12h 47m 57.3s\n   Dec(J2000) = -28d 45' 42.8\"\nwith an uncertainty of 2.7 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 96%.\n\nThe mask-weighted light curve shows a weak structure that starts\nat ~T-3 s and ends at ~T+23 s. T90 (15-350 keV) is 24.37 +- 4.63 sec\n(estimated error including systematics).\n\nThe time-averaged spectrum from T-2.73 to T+23.29 sec is best fit\nby a simple power-law model.  The power law index of the time-averaged\nspectrum is 1.94 +- 0.32.  The fluence in the 15-150 keV band is\n2.9 +- 0.6 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from\nT-0.13 sec in the 15-150 keV band is 0.5 +- 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\nhttp://gcn.gsfc.nasa.gov/notices_s/1093611/BA/",
  "circularId": 31486,
  "createdOn": 1642520196000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 220117B: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 220117B"
}