GRB 240302***A***: Swift-BAT refined analysis
 
<somebody goes first>
<add the BA alphabetically>
S. D. Barthelmy (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),
T. Sakamoto (AGU)
(i.e. the Swift-BAT team):
 
Using the data set from T-239 to T+363 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 240302***A*** (trigger #1218417)
(NAME, et al., GCN Circ. xxxx).  The BAT ground-calculated position is
RA, Dec = 298.856, 36.922 deg which is 
   RA(J2000)  =  19h 55m 25.3s 
   Dec(J2000) = +36d 55' 17.5" 
with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 100%.
 
[Description about the mask-weighted light curve]
T90 (15-350 keV) is 326.59 +- 29.75 sec (estimated error including systematics).
 
The time-averaged spectrum from TTBD to TTBD sec is best fit by a power law
with an exponential cutoff.  This fit gives a photon index 1.34 +- 0.30, 
and Epeak of 59.9 +- 12.7 keV (chi squared 52.19 for 56 d.o.f.).  For this
model the total fluence in the 15-150 keV band is 6.5 +- 0.3 x 10^-06 erg/cm2
and the 1-sec peak flux measured from T+77.70 sec in the 15-150 keV band is
0.6 +- 0.1 ph/cm2/sec.  A fit to a simple power law gives a photon index
of 1.87 +- 0.07 (chi squared 62.39 for 57 d.o.f.).  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/1218417