[vsnet-grb-info 18301] GRB 160801A: Swift-BAT refined analysis

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19749
SUBJECT: GRB 160801A: Swift-BAT refined analysis
DATE:    16/08/01 17:43:33 GMT
FROM:    Hans Krimm at NASA-GSFC  <hans.a.krimm at nasa.gov>

J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), V. D'Elia (ASDC),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU),
M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):

Using the data set from T-60 to T+243 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 160801A (trigger #706871)
(D'Elia, et al., GCN Circ. 19744).  The BAT ground-calculated position is
RA, Dec = 212.763, 13.485 deg which is
    RA(J2000)  =  14h 11m 03.2s
    Dec(J2000) = +13d 29' 06.5"
with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 73%.

The mask-weighted light curve shows a single peak with ~3 second duration,
peaking at T+0. T90 (15-350 keV) is 2.85 +- 0.41 sec (estimated error including
systematics).

The time-averaged spectrum from T-1.34 to T+1.83 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.85 +- 0.22.  The fluence in the 15-150 keV band is 1.7 +- 0.3 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T-0.02 sec in the 15-150 keV band
is 1.2 +- 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/706871/BA/