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GCN Circular 32403

GRB 220714B: Swift-BAT refined analysis
2022-07-15T19:47:40Z (2 years ago)
Hans Krimm at NSF/NASA-GSFC <>
S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC),  H. A. Krimm (NSF),
A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), D. M. Palmer (LANL),
T. Parsotan (GSFC/UMBC), T. Sakamoto (AGU), M. Stamatikos (OSU)
(i.e. the Swift-BAT team):

Using the data set from T-173 to T+963 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 220714B (trigger #1116221)
(Laha, et al., GCN Circ. 32393).  The BAT ground-calculated position is
RA, Dec = 47.086, -19.321 deg which is
   RA(J2000)  =  03h 08m 20.7s
   Dec(J2000) = -19d 19' 13.8"
with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 88%.

The mask-weighted light curve shows a complex structure.  The main period of
emission starts around T-5 sec and continues to T+35 seconds with three main
overlapping pulses.  There is some precursor activity starting as early as T-45
seconds and low-level emission extending to T+60 seconds.  The spacecraft
slewed away from the burst location at around T+275 seconds.
T90 (15-350 keV) is 50.10 +- 7.96 sec (estimated error including systematics).

The time-averaged spectrum from -48.27 to +45.75 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.92 +- 0.07.  The fluence in the 15-150 keV band is 4.4 +- 0.1 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+12.89 sec in the 15-150 keV band
is 3.8 +- 0.2 ph/cm2/sec.  All the quoted errors are at the 90% confidence

The results of the batgrbproduct analysis are available at
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