GCN Circular 5684
Subject
IPN triangulation of GRB060928 (long, exceptionally bright)
Date
2006-10-03T00:09:40Z (18 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@ssl.berkeley.edu>
K. Hurley and T. Cline, on behalf of the Ulysses and Konus GRB teams,
S. Golenetskii, E. Mazets, V. Pal'shin, and D. Frederiks on behalf of
the Konus-Wind team,
D. M. Smith, R. P. Lin, J. McTiernan, E. Bellm, 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,
K.Yamaoka, M.Ohno, Y.Fukazawa, T.Takahashi, M.Tashiro, Y. Terada,
T.Murakami, and K.Makishima on behalf of the Suzaku WAM team, and
S. Barthelmy, J. Cummings, D. Palmer, N. Gehrels, and H. Krimm, on behalf of
the Swift-BAT team,
Ulysses, Konus-Wind, RHESSI, INTEGRAL (SPI-ACS), Suzaku (WAM), and
Swift (BAT) observed this hard-spectrum GRB starting around 04621
seconds. It had a duration of about 215 s in two distinct episodes,
and a fluence of about 3 x 10^-4 erg/cm^2. We have triangulated it to
a preliminary ~855 sq. arcmin. error box (3 sigma), whose coordinates are:
Center: 127.639, -42.210
Corners: 127.490, -42.705
127.737, -43.008
127.555, -41.399
127.774, -41.726
This error box may be improved. It was outside the Swift BAT field of
view for both episodes, and therefore Swift did not image the burst,
although it did detect it. However, in the course of a later,
preplanned observation beginning at T+10 minutes, BAT imaged a weak source
within the IPN error box, at RA, Dec= 127.630, -42.696, which could be
the gamma-ray afterglow. A ToO observation of this source has been
requested. Further details of the energy spectrum will be given in a
forthcoming GCN.