GCN Circular 16852
Subject
IPN Triangulation of GRB 140928A
Date
2014-09-29T17:12:11Z (10 years ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
K. Hurley and J. Goldsten, on behalf of the MESSENGER NS GRB team,
S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks,
D. Svinkin, and T. Cline on behalf of the Konus-Wind team,
V. Connaughton, M. S. Briggs, C. Meegan, and V. Pelassa,
on behalf of the Fermi GBM team,
S. Barthelmy, J. Cummings, N. Gehrels, H. Krimm, and D. Palmer,
on behalf of the Swift-BAT team, and
A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C.
Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, report:
The long-duration GRB 140928A (Desiante et al., GCN Circ. 16847) has
been observed by Fermi (GRB trigger 433592996; von Kienlin et al., GCN
Circ. 16850), Konus-Wind, INTEGRAL (SPI-ACS), MESSENGER (GRNS), and
Swift (BAT), so far, at about 37794 s UT (10:29:54). The burst was
outside the coded field of view of the BAT.
We have triangulated it to a Konus-GBM annulus centered at
RA(2000)=14.055 deg (00h 56m 13s) Dec(2000)=+2.376 deg (+2d 22' 33"),
whose radius is 63.085 +/- 0.902 deg (3 sigma) and to a Konus-MESSENGER
annulus centered at RA(2000)=26.945 deg (01h 47m 47s) Dec(2000)=+14.819
deg (+14d 49' 08"), whose radius is 72.142 +/- 0.121 deg (3 sigma).
The Swift (XRT) source (Pagani et al., GCN Circ. 16848) is inside the
annuli, at the distance between the source and the central line of the
Konus-MESSENGER annulus of 17 arcsec.
A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB140928_T37793/IPN/
The Konus-Wind time history and spectrum will be given in a forthcoming
GCN Circular.