{
  "createdOn": 1722280270571,
  "circularId": 36974,
  "submitter": "Rahul Gupta at NASA GSFC <rahul.gupta@nasa.gov>",
  "body": "R. Gupta (GSFC), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nA. Y. Lien (U Tampa), C. B. Markwardt (GSFC),\nM. J. Moss (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC), D. Sadaula (GSFC/UMBC),\nT. Sakamoto (AGU)(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 240727A (trigger #1245074)\n(Parsotan, et al., GCN Circ. 36938).  The BAT ground-calculated position is\nRA, Dec = 236.451, 8.612 deg which is\n   RA(J2000)  =  15h 45m 48.2s\n   Dec(J2000) = +08d 36' 41.8\"\nwith an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 100%.\n\nThe mask-weighted BAT light curve shows a complex structure with a duration of ~ 215 sec. T90 (15-350 keV) is 177.88 +- 35.46 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-6.79 to T+201.06 sec is best fit by a simple power-law model.  The power law index of the time-averaged spectrum is 1.62 +- 0.18.  The fluence in the 15-150 keV band is 1.4 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+3.12 sec in the 15-150 keV band is 0.4 +- 0.1 ph/cm2/sec.  All 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/BATbursts/hand/1245074/bascript/top.html\n\n",
  "eventId": "GRB 240727A",
  "subject": "GRB 240727A: Swift-BAT refined analysis",
  "bibcode": "2024GCN.36974....1G",
  "submittedHow": "email"
}