GCN Circular 6024

K. Hurley and T. Cline, on behalf of the Mars Odyssey GRB team,

I. Mitrofanov, A. Kozyrev, M. Litvak, A. Sanin, V. Tret'yakov and A.
Parshukov, 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,

K.Yamaoka, M.Ohno, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada,
T. Murakami, and K. Makishima on behalf of the Suzaku WAM team,

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

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

J. Cummings, H. Krimm, S. Barthelmy, and N. Gehrels, on behalf of
the Swift-BAT team, report:

Mars Odyssey (HEND and GRS), Suzaku (WAM), INTEGRAL (SPI-ACS),
and RHESSI observed this intense, ~60 s long event at 26445 s.
Using Odyssey, Suzaku, and INTEGRAL data, it was triangulated
to two annuli, whose preliminary coordinates are RA, Dec, Radius=
96.685, 23.883, 20.068 +/- 0.041, and 82.803, 82.086, 50.831 +/- 4.47
degrees.

Swift was slewing at the time of the burst. A marginal source (of
insufficient significance to trigger a regular GRB response) was
detected in a routine image made after the slew was completed. The
source coincides with the intersection of the Odyssey-INTEGRAL and
WAM-INTEGRAL annuli. Ground processing of the image improves the
significance of the detection. The BAT ground-derived position is 

RA, Dec 117.850, +31.140 degrees

with a 2.5 arcmin radius error circle (estimated 90% confidence limit).
The detection implies that the burst was continuing in the BAT energy
range for > 4 minutes after T0.

A Swift ToO observation has been requested.  Details of the energy
spectrum will be reported later.