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GCN Circular 10761

Subject

GRB 100514A: Swift-BAT refined analysis

Date

2010-05-15T01:48:18Z (14 years ago)

From

Craig Markwardt at NASA/GSFC/UMD <craigm@milkyway.gsfc.nasa.gov>

S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings 
(GSFC/UMBC),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD),
D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. Stamatikos (GSFC/ORAU),
J. Tueller (GSFC), T. N. Ukwatta (GWU)
(i.e. the Swift-BAT team):

Using the data set from T-240 to T+302 sec from recent telemetry 
downlinks, we report further analysis of BAT GRB 100514A (trigger 
#421962) (Markwardt, et al., GCN Circ. 10759Not found
 
 
). The BAT ground-calculated 
position is RA, Dec = 328.757, 29.175 deg, which is
    RA(J2000)  =  21h 55m 01.7s
    Dec(J2000) = +29d 10' 29.8"
with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). 
The partial coding was 76%.

The mask-weighted light curve shows FRED-like peak starting at ~T-2 sec, 
peaking at ~T+7 sec, and ending at ~T+38 sec.  T90 (15-350 keV) is 26.2 
+- 8.2 sec (estimated error including systematics).

The time-averaged spectrum from T+0.3 to T+30.8 sec is best fit by a 
simple power-law model.  The power law index of the time-averaged 
spectrum is 1.97 +- 0.25.  The fluence in the 15-150 keV band is 4.0 +- 
0.7 x 10-7 erg/cm2.  The 1-sec peak photon flux measured from T+6.23 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/421962/BA/