GRB 121229***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 (AGU),
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-61 to T+86 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 121229***A*** (trigger #544381)
(NAME, et al., GCN Circ. xxxx).  The BAT ground-calculated position is
RA, Dec = 185.569, -47.960 deg which is 
   RA(J2000)  =  12h 22m 16.6s 
   Dec(J2000) = -47d 57' 37.6" 
with an uncertainty of 4.3 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 100%.
 
[Description about the mask-weighted light curve]
T90 (15-350 keV) is 1.02 +- 0.00 sec (estimated error including systematics).
 
The time-averaged spectrum from T+0.00 to T+1.02 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
-0.98 +- 1.15.  The fluence in the 15-150 keV band is 3.6 +- 2.5 x 10^-08 erg/cm2.
The 1-sec peak photon flux measured from T+0.00 sec in the 15-150 keV band
is 0.2 +- 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/544381/BA/