TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  1918
SUBJECT: IPN triangulation of GRB030228 (annulus)
DATE:    03/03/03 20:26:01 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  <khurley@sunspot.ssl.berkeley.edu>

K. Hurley, on behalf of the Ulysses GRB team,

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

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

T. Cline, on behalf of the Ulysses and Konus GRB teams, report:

Ulysses, INTEGRAL (SPI-ACS), RHESSI, and Konus-Wind observed this GRB at
73606 seconds.  As observed by Ulysses, it had a duration of
approximately 15 seconds, a 25-100 keV fluence of approximately
2.0E-06 erg/cm2, and a peak flux of approximately  4.9E-07 erg/cm2 s
over 0.50 seconds.

We have triangulated it to a preliminary annulus centered at
RA, Decl (2000)= 347.624, -42.117 degrees, whose radius is
84.182 +/- 0.157 degrees (3 sigma).  

This annulus may be constrained and/or improved, but at this
stage it is not clear whether this event was observed by
Mars Odyssey, and thus whether a small error box can be
obtained for it.