TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2359
SUBJECT: IPN triangulation of GRB030821 (=H2814; refined error box)
DATE:    03/08/22 16:51:26 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  <khurley@sunspot.ssl.berkeley.edu>

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

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

I. Mitrofanov, S. Charyshnikov, V. Grinkov, 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,

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

Ulysses data have now been received for this burst (GCN 2358).  Because
Ulysses is approximately 16 times farther from Earth than Mars, the
width of the triangulation annulus is substantially smaller.  We have
triangulated the position to a preliminary annulus centered at RA,
Decl(2000)= 340.962, -23.121 degrees, with radius 25.143 +/- 0.332
degrees (3 sigma).  This annulus intersects the HETE WXM error box
given in GCN 2358 to form an error box which is about 5 times smaller,
with an area ~1200 square arcminutes. The corners of this error box
are:

RA(2000)    Decl(2000)
326.077     -45.547
325.767     -44.594
325.266     -45.157
324.954     -44.170

A figure has been posted at ssl.berkeley.edu/ipn3/030821.  Only very
slight improvements to this error box are expected.