TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2438
SUBJECT: IPN triangulation of GRB031027 (small error box)
DATE:    03/10/30 21:49:51 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  <khurley@sunspot.ssl.berkeley.edu>

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

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

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, and

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

Ulysses, Mars Odyssey-HEND, Konus-Wind, HETE-FREGATE (H2884), and
RHESSI observed this GRB at 61630 seconds.  As observed by Ulysses, it
had a duration of approximately 41 seconds, a 25-100 keV fluence of
approximately  1.4E-05 erg/cm2, and a peak flux of approximately
1.5E-06 erg/cm2 s over 0.25 seconds.

We have triangulated it to a preliminary, 3 sigma error box whose
approximate area is 100 sq. arcmin. and whose coordinates are:

    RA(2000)                              DEC(2000)
 ERROR BOX CENTER:   8 h 41 m 38.42 s    -82 o 18 '  26.07 " 
 ERROR BOX CORNER 1:  8 h 42 m 29.06 s    -82 o 18 '  53.30 " 
 ERROR BOX CORNER 2:  8 h 14 m 32.75 s    -81 o 28 '  14.96 " 
 ERROR BOX CORNER 3:  9 h 14 m 11.31 s    -83 o  0 '  36.18 " 
 ERROR BOX CORNER 4:  8 h 40 m 47.87 s    -82 o 17 '  58.47 " 

This error box may be improved.