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 2652

Triangulation of GRB 040816 (Konus-Wind - Helicon-Coronas-F)
2004-08-19T13:41:45Z (20 years ago)
Dmitry Frederiks at Ioffe Institute <>
S. Golenetskii, E. Mazets, V. Pal'shin, and D. Frederiks on behalf
of Konus-Wind and Helicon/Coronas-F teams,

T. Cline, on behalf of the Konus GRB team,

GRB 040816 was detected by Konus-Wind at 08:19:58.724 UT
and Helicon-Coronas-F at 08:19:53.763 UT. It consisted of
hard short initial peak with a duration of approximately 0.78 s,
and a much less intense and softer peak ~24.5 s after
the trigger time with a tail lasting for approximately 30 s.
The peaks were detected by both instruments and had the same relative
time delay, so we suppose that they had the same origin.

We have triangulated it to a preliminary annulus:
RA(2000) = 311.825 deg,
Decl(2000) = -20.528 deg,
Radius = 27.353 +/- 1.079 degrees (3 sigma ).
Looking for U.S. government information and services? Visit