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GRB 030922A, GRB 030922

GCN Circular 2400

Subject
IPN triangulation of GRB030922A (large error box)
Date
2003-09-25T01:03:25Z (23 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley and T. Cline, on behalf of the Ulysses and Konus GRB teams,

D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W. Hajdas, 
and A. Zehnder, on behalf of the RHESSI GRB team, and

E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team, report:

Ulysses, RHESSI, and Konus-Wind observed this GRB at 31404 seconds (GCN
2397).  As observed by Ulysses, it had a duration of approximately 35
seconds, a 25-100 keV fluence of approximately  5.2E-06 erg/cm2, and a
peak flux of approximately  7.3E-07 erg/cm2 s over 0.25 seconds.

We have triangulated it to a preliminary annulus centered  at RA, Decl(2000)=
165.760,  19.841 degrees, whose radius is 58.647 +/-  0.036 degrees (3 sigma).

This annulus intersects the Konus-Helicon annulus (GCN 2397) to
form two error boxes, one of which may be eliminated by the Konus
ecliptic latitude response.  The resulting error box has an approximate
area of 30000 sq. arcmin.  Its coordinates are:

                     RA(2000)                   DEC(2000)
ERROR BOX CENTER:   15 h 18 m 17.78 s          25 o 30 ' 06.47 "   
ERROR BOX CORNER1:  15 h 21 m 22.52 s          30 o 16 ' 36.32 "
ERROR BOX CORNER2:  15 h 21 m 00.84 s          30 o 13 ' 06.70 "
ERROR BOX CORNER3:  15 h 15 m 35.22 s          21 o 28 ' 07.05 "
ERROR BOX CORNER4:  15 h 15 m 12.55 s          21 o 23 ' 21.82 "

Only slight improvements to this error box are expected.

GCN Circular 2397

Subject
GRB030922 triangulation (annulus)
Date
2003-09-23T10:21:51Z (23 years ago)
From
Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>
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, peport:

GRB030922 was detected by Konus-Wind at 08:43:24.120 UT
and Helicon-Coronas-F at 08:43:22.193 UT. It has a duration of ~35 sec.
There was a possible weak precursor 190 sec before trigger time, it had 
been detected by both instruments.

We have triangulated it to a preliminary annulus centered at
RA(2000) = 262.610 deg,
Decl(2000) = -18.591 deg,
Radius = 54.9 +/- 3.0 degrees (3 sigma ).

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