{
  "bibcode": "2014GCN.16438....1S",
  "body": "T. Sakamoto (AGU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),\nA. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL),\nM. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n\n  Using the data set from T-61 to T+302 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 140622A (trigger #602278) (D'Elia, et al.,\nGCN Circ. 16433).  The BAT ground-calculated position is\nRA, Dec = 317.153, -14.412 deg which is\n\n    RA(J2000)  =  21h 08m 36.7s\n    Dec(J2000) = -14d 24' 44.6\"\n\nwith an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 57%.\n\nThe mask-weighted light curve shows a single FRED peak.  T90 (15-350 keV) is\n0.13 +- 0.04 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-0.02 to T+0.13 sec is best fit (chisqr = 0.63) by\na black body spectrum with kT = 11.6 � 1.8 keV.  A simple power-law model is a\nrelatively poor fit (chisqr 1.13), with a photon index of 3.08 � 0.29.  A power-law\nwith an exponential cutoff at 44 � 8 keV nominally fits the data almost as well\n(chisqr = 0.64) as the black body fit, but the power-law index below the cutoff\nenergy and the normalization are poorly defined.  The fluence in the 15-150 keV\nband using the black body spectrum is (2.7 � 0.5) x 10^-08 erg/cm2.  The 1-sec\npeak photon flux measured from T-0.45 sec in the 15-150 keV band is\n0.6 � 0.2 ph/cm2/sec.  All the quoted errors are at the 90% confidence level.\n\n From the BAT spectrum, this event does not appear to be a short hard burst.  The\nquickly fading X-ray lightcurve, however (to be reported in a later circular), does\nappear consistent with a SHB, and does not appear to be similar to the lightcurves\nof SGRs or other Galactic sources.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/602278/BA/",
  "circularId": 16438,
  "createdOn": 1403472734000,
  "email": "james.r.cummings@nasa.gov",
  "subject": "GRB 140622A: An unusual short event, Swift-BAT refined analysis",
  "submitter": "Jay R. Cummings at NASA/GSFC/Swift  <james.r.cummings@nasa.gov>",
  "eventId": "GRB 140622A"
}