{
  "eventId": "GRB 230606A",
  "createdOn": 1686157463212,
  "submitter": "Amy Lien at GSFC <amy.y.lien@nasa.gov>",
  "bibcode": "2023GCN.33933....1L",
  "subject": "GRB 230606A: Swift-BAT refined analysis",
  "circularId": 33933,
  "body": "A. Y. Lien (U Tampa), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC/UMBC), T. Sakamoto (AGU),\nM. Stamatikos (OSU) (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 230606A (trigger #1173731)\n(Lien et al., GCN Circ. 33921).  The BAT ground-calculated position is\nRA, Dec = 166.777, 36.504 deg which is\n   RA(J2000)  =  11h 07m 06.4s\n   Dec(J2000) = +36d 30' 15.6\"\nwith an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 15%.\n\nThe mask-weighted light curve shows two distinct pulses. The first pulse starts\nat ~T0 and ends at ~T+4 s. The second pulse starts at ~T+14 s and ends at ~T+16 s.\nT90 (15-350 keV) is 16.26 +- 1.29 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-0.26 to T+16.97 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.15 +- 0.30.  The fluence in the 15-150 keV band is 1.2 +- 0.2 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.92 sec in the 15-150 keV band\nis 2.6 +- 0.6 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/1173731/BA/\n\n"
}