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GCN Circular 38033

Subject

GRB 241101A: Swift-BAT refined analysis

Date

2024-11-01T13:15:57Z (a month ago)

From

Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>

Via

Web form

A. Y. Lien (U Tampa), 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)
(i.e. the Swift-BAT team):
 
Using the data set from T-60 to T+243 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 241101A (trigger #1264304)
(Parsotan, et al., GCN Circ. 38025Not found
 
 
).  The BAT ground-calculated position is
RA, Dec = 204.323, 28.233 deg which is
   RA(J2000)  =  13h 37m 17.5s
   Dec(J2000) = +28d 13' 57.6"
with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 100%.
 
The mask-weighted light curve shows a single-pulse structure that starts at
T-2 sec, peaks at T+1 sec, and ends at T+9 sec.  T90 (15-350 keV) is
10.3 +- 4.5 sec (estimated error including systematics).
 
The time-averaged spectrum from T-2.76 to T+12.86 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.79 +- 0.13.  The fluence in the 15-150 keV band is 5.1 +- 0.4 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T-0.29 sec in the 15-150 keV band
is 1.4 +- 0.1 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/1264304