GCN Circular 19827

D. M. Palmer (LANL), S. D. Barthelmy (GSFC),
and A. Y. Lien (GSFC/UMBC) report on behalf of the Swift Team:

At 20:27:30.40 UT on 2016-08-19, the Swift Burst Alert Telescope (BAT)
detected GRB 160819A, which was also detected by Fermi/GBM and
INTEGRAL SPI-ACS (Veres et al., GCN Circ. 19826
Not found
 
 
). BAT was slewing to
a pre-planned target at that time, so it did not trigger on the burst.

However, ground analysis using the slew data fromT+27 to T+106 sec
reveals the GRB location of RA, Dec = 114.139, -22.347 deg, which is
  RA(J2000)  =  07h 36m 33.3s
  Dec(J2000) = -22d -20' -50.2"
with an uncertainty of 3.0 arcmin, (radius, sys+stat, 90% containment).
This position is 4.76 deg from the one reported by Fermi GBM, which is
consistent with the reported GBM error circle (Veres et al., GCN Circ. 19826
Not found
 
 
).

The mask-weighted light curve shows a double-peaked structure that starts
before the beginning of the available event data, and ends at ~ T+70 s. The
two peaks occur at ~T+47 s and ~T+53 s, respectively.

The time-averaged spectrum from T+26.6 to T+73.6 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.70 +- 0.05.  The fluence in the 15-150 keV band is (7.76 +/- 0.23) x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+46.70 sec in the 15-150 keV band
is 12.1 +- 0.6 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/00086022006/BA/