TITLE:   GCN CIRCULAR
NUMBER:  19726
SUBJECT: IPN Triangulation of GRB 160720A
DATE:    16/07/21 17:47:24 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>

K. Hurley, on behalf of the IPN,

I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin,
on behalf of the HEND-Odyssey GRB team,

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

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

W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr,
on behalf of the GRS-Odyssey GRB team, report:

The long-duration GRB 160720A (Hamburg and Burns, GCN Circ. 19724) has 
been detected by Fermi (GBM), Konus-Wind, INTEGRAL (SPI-ACS), and 
Mars-Odyssey (HEND), so far, at about 66237 s UT (18:23:57).

We have triangulated it to a preliminary, 3 sigma error box whose 
coordinates are:
   ---------------------------------------------
    RA(2000), deg                 Dec(2000), deg
   ---------------------------------------------
   Center:
     58.153 (03h 52m 37s) +73.893 (+73d 53' 33")
   Corners:
     62.806 (04h 11m 13s) +74.084 (+74d 05' 01")
     53.505 (03h 34m 01s) +74.329 (+74d 19' 44")
     53.637 (03h 34m 33s) +73.582 (+73d 34' 56")
     62.531 (04h 10m 07s) +73.338 (+73d 20' 17")
   ---------------------------------------------
The error box area is 1.9 sq. deg, and its maximum
dimension is 2.7 deg (the minimum one is 44.8 arcmin).
The Sun distance was 61 deg.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB160720_T66314/IPN/

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