GRB 990321

K. Hurley, on behalf of the Ulysses-GRB team, T. Cline and E. Mazets,
on behalf of the KONUS and NEAR GRB teams, report:

Ulysses, KONUS-WIND, and NEAR observed a weak, ~20 s long gamma-ray
burst on March 21, 1999, which was not observed by BATSE.  The
Earth-crossing time for this event was 16012 s UT.  Triangulation
results in two positions, one of which may be eliminated due to the
directional response of the two KONUS detectors.  (The eliminated
position is also consistent with no BATSE detection, as it is
Earth-blocked for CGRO.)  The remaining error box is rather large
(dimensions ~6'x40') due to the weakness of the burst.  The preliminary
error box corners are given below and the geometry may be viewed at
http://ssl.berkeley.edu/ipn3/990321.  Some improvement is possible.

   RA(2000)               DEC(2000)
12 H 49 M 36.00 S      +80 D 05 M 59.72 S
13 H 01 M 33.51 S      +79 D 37 M 25.99 S
13 H 22 M 05.19 S      +79 D 03 M 18.34 S
13 H 31 M 36.26 S      +78 D 30 M 29.37 S

K. Hurley, T. Cline, and E. Mazets, on behalf of the Ulysses-GRB,
KONUS-WIND, and NEAR GRB teams, report:

We have refined the error box of GRB990321 (GCN 283
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 ).  The new
box, which is entirely contained within the old one, has an
area of ~290 sq. arcminutes.  Its corners have the following
coordinates:

          RA(2000)              DEC(2000)
     13 H 01 M 33.51 S      79 D 37 M 25.99 S
     13 H 22 M 05.19 S      79 D 03 M 18.34 S
     13 H 10 M 26.62 S      79 D 28 M 40.46 S
     13 H 13 M 40.76 S      79 D 13 M 20.77 S
     13 H 01 M 26.89 S      79 D 37 M 43.00 S
     13 H 22 M 10.97 S      79 D 02 M 59.68 S

This error box may be viewed at http://ssl.berkeley.edu/ipn3/990321.  
Further improvement will be possible when the final data are
received.