TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2454
SUBJECT: IPN triangulation of GRB031120 (two large error boxes)
DATE:    03/11/21 18:02:34 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  <khurley@sunspot.ssl.berkeley.edu>

K. Hurley and T. Cline, on behalf of the Ulysses, HETE, and KONUS GRB
teams,

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

G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R.
Vanderspek, J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G.
Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, J. Braga, R.
Manchanda, G.  Pizzichini, Y. Shirasaki, C. Graziani, M. Matsuoka, T.
Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi,
T. Tavenner, T.  Donaghy, M. Boer, J-F Olive, and J-P Dezalay, on
behalf of the HETE GRB team, report:

Konus-Wind and HETE-FREGATE observed this ~140 s long GRB at 21113 s.
We have triangulated it to a preliminary annulus centered at RA, Decl
(2000)= 66.273, +18.171, whose radius is 30.555 +/-  7.134 degrees (3
sigma).  In addition, the Konus ecliptic latitude response limits the
arrival directions to ecliptic latitudes between 0 and +10 degrees,
that is, to those portions of the annulus between RA, Decl = 26, +21
and 43, +27, and between 86, +33 and 106, +22 degrees.

This localization may be improved, but a small error box cannot be
derived for this event.