Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 16127

GRB 140419A: Swift-BAT refined analysis
2014-04-19T15:19:34Z (10 years ago)
Scott Barthelmy at NASA/GSFC <>
W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC),
C. B. Markwardt (GSFC), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL),
T. Sakamoto (AGU), 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+485 sec from recent telemetry downlinks,
we report further analysis of BAT GRB 140419A (trigger #596426)
(Marshall, et al., GCN Circ. 16118).  The BAT ground-calculated position is
RA, Dec = 127.001, 46.234 deg, which is 
   RA(J2000)  =  08h 28m 00.4s 
   Dec(J2000) = +46d 14' 03.7" 
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 33%.
The mask-weighted light curve shows two slightly overlapping clusters of
peaks, starting at ~T-10 sec, peaking at ~T+10 and ~T+51 sec, and ending
at ~T+220 sec.  T90 (15-350 keV) is 94.7 +- 11.0 sec (estimated error
including systematics).
The time-averaged spectrum from T-8.69 to T+222.32 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.21 +- 0.04.  The fluence in the 15-150 keV band is 1.59 +- 0.03 x 10^-5 erg/cm2.
The 1-sec peak photon flux measured from T+51.42 sec in the 15-150 keV band
is 4.9 +- 0.2 ph/cm2/sec.  All the quoted errors are at the 90% confidence
The results of the batgrbproduct analysis are available at

[GCN OPS NOTE(22apr14): Per author's request, the fluence value
was changed from "1.6 +- 0.0" to "1.59 +- 0.03". Acknowledgement
to F.Marshall for pointing out the missing error value.]
Looking for U.S. government information and services? Visit