{
  "bibcode": "2023GCN.33363....1B",
  "body": "S. D. Barthelmy (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC),\r\nA. Y. Lien (U Tampa), C. B. Markwardt (GSFC), M. J. Moss (GWU),\r\nD. M. Palmer (LANL), T. Parsotan (GSFC/UMBC), T. Sakamoto (AGU),\r\nM. Stamatikos (OSU) (i.e. the Swift-BAT team):\r\n\r\nUsing the data set from T-240 to T+962 sec from the recent telemetry downlink,\r\nwe report further analysis of BAT GRB 230217A (trigger #1154967)\r\n(Moss, et al., GCN Circ. 33339).  The BAT ground-calculated position is\r\nRA, Dec = 280.759, -28.840 deg which is\r\n   RA(J2000)  =  18h 43m 02.2s\r\n   Dec(J2000) = -28d 50' 23.0\"\r\nwith an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).\r\nThe partial coding was 21%.\r\n\r\nThe mask-weighted light curve shows a double-peaked event running from\r\nT -0.2 sec to about T+1.2 sec. T90 (15-350 keV) is 1.30 +- 0.45 sec.\r\n(estimated error including systematics).  The T90 vs. hardness diagram shows\r\nthe burst well within the short-hard burst region.\r\n\r\nThe time-averaged spectrum from T-0.26 to T+1.75 sec is best fit by a simple\r\npower-law model.  The power law index of the time-averaged spectrum is\r\n0.99 +- 0.12.  The fluence in the 15-150 keV band is 2.3 +- 0.2 x 10^-6 erg/cm2.\r\nThe 1-sec peak photon flux measured from T-0.24 sec in the 15-150 keV band\r\nis 20.2 +- 1.5 ph/cm2/sec.  All the quoted errors are at the 90% confidence\r\nlevel.\r\nThe results of the batgrbproduct analysis are available at\r\nhttp://gcn.gsfc.nasa.gov/notices_s/1154967/BA/",
  "circularId": 33363,
  "createdOn": 1677005695000,
  "email": "hkrimm@nsf.gov",
  "subject": "GRB 230217A: Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NSF/NASA-GSFC  <hkrimm@nsf.gov>",
  "eventId": "GRB 230217A"
}