[vsnet-grb-info 18404] IPN Triangulation of GRB 160822A (short/hard)

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19852
SUBJECT: IPN Triangulation of GRB 160822A (short/hard)
DATE:    16/08/24 00:18:54 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin at mail.ioffe.ru>

D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Kozlova,
and T. Cline on behalf of the Konus-Wind team,

K. Hurley, on behalf of the IPN,

V. Connaughton, M. S. Briggs, C. Meegan, V. Pelassa,
and A. Goldstein, on behalf of the Fermi GBM team,

A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,

and

S. Barthelmy, J. Cummings, N. Gehrels, H. Krimm, and D. Palmer,
on behalf of the Swift-BAT team, report:

The short-duration, hard-spectrum, bright GRB 160822A has been detected 
by Fermi (GBM; Hamburg et al., GCN Circ. 19845), Konus-Wind, INTEGRAL 
(SPI-ACS), and Swift (BAT) at about 58060 s UT (16:07:40). The burst was 
outside the coded field of view of the BAT.

We have triangulated it to a preliminary, 3 sigma error box whose
coordinates are:
---------------------------------------------
    RA(2000), deg                 Dec(2000), deg
   ---------------------------------------------
   Center:
    272.129 (18h 08m 31s)  +3.584 ( +3d 35' 01")
   Corners:
    272.065 (18h 08m 16s)  +1.771 ( +1d 46' 15")
    271.809 (18h 07m 14s)  +1.779 ( +1d 46' 45")
    272.205 (18h 08m 49s)  +5.396 ( +5d 23' 45")
    272.462 (18h 09m 51s)  +5.389 ( +5d 23' 19")
   ---------------------------------------------
The error box area is 3348 sq. arcmin, and its maximum
dimension is 3.67 deg (the minimum one is 15.4 arcmin).
The Sun distance was 118 deg.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB160822_T58061/IPN/

The Konus-Wind time history and spectrum will be given in forthcoming 
GCN Circulars.