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GCN Circular 35015

Subject

GRB 231110A: Swift-BAT refined analysis

Date

2023-11-13T17:16:36Z (6 months ago)

From

Mike Moss at NASA GSFC <mikejmoss3@gmail.com>

Via

Web form

S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC),
V. D'Elia (SSDC & INAF-OAR), H. A. Krimm (NSF), 
A. Y. Lien (U Tampa), C. B. Markwardt (GSFC),
M. J. Moss (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-239 to T+963 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 231110A (trigger #1195733)
(D'Elia, et al., GCN Circ. 34977Not found
 
 
).  The BAT ground-calculated position is
RA, Dec = 356.244, 82.630 deg which is 
   RA(J2000)  =  23h 44m 58.7s 
   Dec(J2000) = +82d 37' 48.6" 
with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 34%.
 
The BAT light curve shows a single pulse structure with a duration of ~ 11 
seconds and peaking ~1.5 seconds after the trigger time.
T90 (15-350 keV) is 11.34 +- 1.56 sec (estimated error including systematics).
 
The time-averaged spectrum from T-1.60 to T+12.32 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.35 +- 0.11.  The fluence in the 15-150 keV band is 1.5 +- 0.1 x 10^-06 erg/cm2.
The 1-sec peak photon flux measured from T+0.63 sec in the 15-150 keV band
is 3.4 +- 0.4 ph/cm2/sec.  All the quoted errors are at the 90% confidence
level. 
 
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/1195733/BA/