Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 2061

triangulation of GRB 030331 (single error box)
2003-04-01T14:42:27Z (21 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 Ulysses and Konus GRB teams,

K. Hurley, on behalf of the Ulysses GRB team, and

A. von Kienlin, G. Lichti, and A. Rau, on behalf of the
INTEGRAL SPI-ACS GRB team, report:

GRB 030331 was detected by Konus-Wind at 05:38:40.824 UT
and Helicon-Coronas-F at 05:38:44.347 UT.
As observed by Konus-Wind, it had a 15-2000 keV fluence of
approximately  2.7E-5 erg/cm2 in 25 s, and a peak flux of
5.5E-6 erg/cm2 s over 0.128s.

We have triangulated it to a preliminary annulus centered at
RA(2000) = 27.250 deg,
Decl(2000) = 13.733 deg,
Radius = 40.7 +/- 1.1 degrees (3 sigma ).
This annulus intersects the IPN annulus (GCN 2057) to form two
large error boxes, only one of which is in the correct ecliptic
latitude band.
Preliminary 3 sigma error box has approximate area of 400 sq.
arcmin :

			RA(2000)	Dec(2000)
ERROR BOX CENTER:	349.261		36.260
ERROR BOX CORNER 1:	347.872		36.429
ERROR BOX CORNER 2:	347.852		36.389
ERROR BOX CORNER 3:	350.666		36.089
ERROR BOX CORNER 4:	350.643		36.049

Dmitry Frederiks
[aka Fred]
Lab for High Energy Astrophysics, Space Research Dept,
A.F.Ioffe Phys.-Tech. Institute, St.Petersburg, Russia
Looking for U.S. government information and services? Visit