TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2736
SUBJECT: IPN triangulation of GRB040924 (H3564)
DATE:    04/09/24 16:59:51 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  <khurley@sunspot.ssl.berkeley.edu>

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

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, and

E. E. Fenimore, G. Ricker, J-L. Atteia, N. Kawai, D. Lamb, S. Woosley,
T. Donaghy,  M. Galassi, C. Graziani, M. Matsuoka, Y. Nakagawa, T.
Sakamoto, R. Sato, Y. Shirasaki, M. Suzuki, T. Tamagawa, Y. Urata, T.
Yamazaki, Y. Yamamoto, A. Yoshida, N. Butler, G. Crew, J. Doty, A.
Dullighan, G. Prigozhin, R. Vanderspek, J. Villasenor, J. G. Jernigan,
A. Levine, G. Azzibrouck, J. Braga, R. Manchanda, G. Pizzichini, C.
Barraud, M. Boer, J-F Olive, and J-P Dezalay, on behalf of the HETE GRB
team, report:

This burst (H3564, GCN 2735) was observed by Mars Odyssey (HEND).  Ulysses was
off.  We have triangulated it to a preliminary annulus centered RA,
Decl. (2000)=359.188, -1.351 degrees, whose radius is 36.408 +/- 0.044
degrees (3 sigma).  This annulus intersects the HETE WXM error circle at the
following points:

RA(2000)   Decl.(2000)
31.630     +16.037
31.531     +16.236
31.528     +16.038
31.467     +16.159

The joint IPN/WXM error box has an area of ~70 sq. arcmin.;
the candidate optical counterpart reported by Fox and Moon
(GCN 2734) lies just at the outer edge of this error box.
A map will be posted shortly at www.ssl.berkeley.edu/ipn3/040924.