GCN Circular 298
Subject
Refined IPN error box for GRB990506
Date
1999-05-07T20:49:45Z (26 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley, on behalf of the Ulysses GRB team, C. Kouveliotou and R. M. Kippen,
on behalf of the BATSE GRB team, and T. Cline, on behalf of the NEAR GRB team,
report:
We have obtained a refined position for this burst using higher time
resolution data, and adding the data of the NEAR spacecraft. This
results in a true error box, as opposed to just a triangulation
annulus. This error box is consistent with that obtained from the
intersection of the Ulysses-BATSE annulus with the RXTE error circle,
and therefore confirms that the fading X-ray source is indeed related
to the GRB, but in this preliminary analysis, it does not reduce
its size.
Thus the refined error box (area ~30 sq. arcmin.) is defined by the new
Ulysses-BATSE annulus and the RXTE error circle. The corners are at:
RA(2000) Dec(2000)
11 h 54 m 33 s -26 o 50 ' 59 "
11 h 54 m 56 s -26 o 40 ' 07 "
11 h 54 m 24 s -26 o 49 ' 16 "
11 h 54 m 45 s -26 o 39 ' 36 "
Reductions in the widths of the annuli of the order of a factor
of two or more will be possible. An image may be viewed at
http://ssl.berkeley.edu/ipn3/990506.