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GCN Circular 33645

Subject

GRB 230414B Swift-BAT refined analysis

Date

2023-04-18T17:28:11Z (a year ago)

From

Tyler Parsotan at UMBC/GSFC/CRESST II <parsotat@umbc.edu>

T. Parsotan (GSFC/UMBC), S. D. Barthelmy (GSFC),

H. A. Krimm (NSF), S. Laha (GSFC/UMBC),

A. Y. Lien (U Tampa), C. B. Markwardt (GSFC),

D. M. Palmer (LANL), 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 230414B (trigger #1164180)

(D'Ai et al., GCN 33612Not found
 
 
).  The BAT ground-calculated position is

RA, Dec = 181.052, 53.179 deg which is

   RA(J2000)  =  12h 04m 12.5s

   Dec(J2000) = +53d 10' 44.7"

with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment).

The partial coding was 80%.


The mask weighted light curve shows a single main fast rise exponential
decay type pulse.

T90 (15-350 keV) is 25.98 +- 8.86 sec (estimated error including
systematics).


The time-averaged spectrum from T-1.77 to T+27.14 sec is best fit by a
simple

power-law model.  The power law index of the time-averaged spectrum is

1.60 +- 0.30.  The fluence in the 15-150 keV band is 4.7 +- 1.0 x 10^-07
erg/cm2.

The 1-sec peak photon flux measured from T+9.31 sec in the 15-150 keV band

is 0.6 +- 0.2 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/1164180/BA/