GCN Circular 38229

C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC), R. Gupta (GSFC),
H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa),
C. B. Markwardt (GSFC), M. J. Moss (GSFC), D. M. Palmer (LANL),
T. Parsotan (GSFC), D. Sadaula (GSFC/UMBC), T. Sakamoto (AGU), M. H. Siegel (PSU)
(i.e. the Swift-BAT team):
 
Using the data set from T-239 to T+329 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 241113A (trigger #1267501)
(Siegel, et al., GCN Circ. 38194
Not found
 
 
).  The BAT ground-calculated position is
RA, Dec = 16.578, -22.658 deg which is
   RA(J2000)  =  01h 06m 18.7s
   Dec(J2000) = -22d 39' 27.8"
with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 93%.
 
The mask-weighted light curve shows a single-pulse structure that starts at
T0, peaks at T+0.5 sec, and ends at T+2 sec.  There is a hint of the emission
between T+35 sec and T+80 sec.  T90 (15-350 keV) is 1.7 +- 0.4 sec
(estimated error including systematics).
 
The time-averaged spectrum from T+0.01 to T+2.06 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.76 +- 0.23.  The fluence in the 15-150 keV band is 1.3 +- 0.2 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T-0.00 sec in the 15-150 keV band
is 1.4 +- 0.2 ph/cm2/sec.  All the quoted errors are at the 90% confidence
level.
 
The results of the batgrbproduct analysis are available at
https://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1267501