GRB 110807***A***, Swift-BAT refined analysis
 
<somebody goes first>
<add the BA alphabetically>
S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC),
E. E. Fenimore (LANL),
N. Gehrels (GSFC),
H. A. Krimm (GSFC/USRA),
C. B. Markwardt (GSFC),
D. M. Palmer (LANL),
T. Sakamoto (GSFC/UMBC),
G. Sato (ISAS),
M. Stamatikos (OSU),
J. Tueller (GSFC),
T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
 
Using the data set from T-240 to T+963 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 110807***A*** (trigger #458907)
(NAME, et al., GCN Circ. xxxx).  The BAT ground-calculated position is
RA, Dec = 278.709, -8.758 deg which is 
   RA(J2000)  =  18h 34m 50.1s 
   Dec(J2000) = -08d 45' 28.4" 
with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 89%.
 
[Description about the mask-weighted light curve]
T90 (15-350 keV) is 0.0 +- 0.0 sec (estimated error including systematics).
 
The time-averaged spectrum from T+0.0 to T+0.0 sec is best fit by a power law
with an exponential cutoff.  This fit gives a photon index -0.70 +- 2.57, 
and Epeak of 40.5 +- 8.0 keV (chi squared 51.91 for 56 d.o.f.).  For this
model the total fluence in the 15-150 keV band is 1.2 +- 0.3 x 10^-08 erg/cm2
and the 1-sec peak flux measured from T-0.48 sec in the 15-150 keV band is
0.3 +- 0.2 ph/cm2/sec.  A fit to a simple power law gives a photon index
of 2.13 +- 0.30 (chi squared 59.73 for 57 d.o.f.).  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/458907/BA/