GRB 021027
GCN Circular 1658
Subject
IPN triangulation of GRB021027 (annulus)
Date
2002-10-28T01:02:05Z (23 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley, on behalf of the Ulysses GRB team,
E. Mazets and S. Golenetskii, on behalf of the Konus GRB team, and
T. Cline, on behalf of the Ulysses and Konus GRB teams, report:
Ulysses and Konus observed this burst at 30831 s. As observed by
Ulysses, it had a duration ~10 s, a 25-100 keV fluence of 6.4E-6 erg/cm2,
and a peak flux over 0.5 s of 6.5E-7 erg/cm2 s. We have triangulated
it to a preliminary annulus centered at RA, Decl(2000)=178.852,
+35.645, whose radius is 68.409 +/- 0.139 degrees (3 sigma).
This triangulation can be improved, but at this point it is not clear
whether this event was observed by MO and thus whether a small error
box can be derived for it.
GCN Circular 1660
Subject
IPN triangulation of GRB021027 (two large error boxes)
Date
2002-10-28T18:54:54Z (23 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley, on behalf of the Ulysses GRB team,
E. Mazets and S. Golenetskii, on behalf of the Konus GRB team, and
T. Cline, on behalf of the Ulysses and Konus GRB teams, report:
The Konus ecliptic latitude response restricts the IPN annulus (RA,
Decl(2000)=178.852, +35.645, radius 68.409 +/- 0.139 degrees, GCN
1658) to two sections, one between RA, Decl. ~ 99, +23 and 115, +1, and
the other between RA, Decl. ~ 200.,-30, and 225.,-17.
It is still not known whether this burst was observed by MO, and
thus whether a small error box can be derived for it.
GCN Circular 1662
Subject
IPN triangulation of GRB021027 (single large error box)
Date
2002-10-29T16:37:43Z (23 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley and T. Cline, on behalf of the Ulysses, Konus, and Mars
Odyssey GRB teams,
I. Mitrofanov, D. Anfimov, A. Kozyrev, M. Litvak and A. Sanin, on
behalf of the HEND/Odyssey GRB team,
W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on
behalf of the GRS/Odyssey GRB team, and
E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team,
report:
This burst (GCN 1658, 1660) was also observed by Mars Odyssey - HEND. We
have triangulated it to a preliminary, 3 sigma error boxes whose area
is ~1200 square arcminutes and whose coordinates are:
ERROR BOX CENTER: 14 h 26 m 18.78 s -22 o 42 ' 26.04 "
ERROR BOX CORNER 1: 14 h 31 m 10.21 s -22 o 8 ' 58.20 "
ERROR BOX CORNER 2: 14 h 26 m 54.32 s -22 o 47 ' 8.38 "
ERROR BOX CORNER 3: 14 h 25 m 43.21 s -22 o 37 ' 43.62 "
ERROR BOX CORNER 4: 14 h 21 m 8.02 s -23 o 16 ' 57.75 "
Only small improvements to this error box are expected.