{
  "bibcode": "2021GCN.30124....1U",
  "body": "T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC),\nJ. R. Cummings (CPI), H. A. Krimm (NSF),\nS. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC),\nC. B. Markwardt (GSFC), 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+100 sec from the recent telemetry\ndownlink,\nwe report further analysis of SGR J1555.2-5402 (trigger #1053220)\n(Palmer et al., GCN Circ. 30120).  The BAT ground-calculated position is\nRA, Dec = 238.782, -54.065 deg which is\n   RA(J2000)  =  15h 55m 07.6s\n   Dec(J2000) = -54d 03' 55.6\"\nwith an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 89%.\n\nThe 1-ms binned mask-weighted light curve shows a multi-peaked structure\nthat starts at ~T-0.003 s and ends at ~T+0.008 s. The two peaks occur at\n~T+0.003 s and ~T+0.006 s, respectively. T90 (15-350 keV) estimated from\nthe 1-ms binned light curve is 0.011 +- 0.003 sec (estimated error\nincluding\nsystematics).\n\nThe time-averaged spectrum from T+0.00 to T+0.008 sec can be fitted by\na simple power-law model.  The power law index of the time-averaged\nspectrum is 2.45 +- 0.31 (chi squared 25.37 for 57 d.o.f.).\nThe fluence in the 15-150 keV band is 9.5 +- 2.0 x 10^-9 erg/cm2.\n\nA single blackbody fit to the time-averaged spectrum shows the blackbody\ntemperature of 6.9 +- 1.2 keV (chi squared 23.26 for 57 d.o.f.).\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/1053220/BA/",
  "circularId": 30124,
  "createdOn": 1622822286000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "SGR J1555.2-5402: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>"
}