TITLE:   GCN CIRCULAR
NUMBER:  28121
SUBJECT: IPN triangulation of GRB 200716A
DATE:    20/07/16 21:32:56 GMT
FROM:    Anna Ridnaia at Ioffe Institute  <ridnaia@mail.ioffe.ru>

K. Hurley, on behalf of the IPN,

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

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

A. Goldstein, M. S. Briggs, and C. Wilson-Hodge
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,

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

and

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

The intense long-duration GRB 200716A
(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 28109,
Malacaria et al., GCN Circ. 28120;
BALROG localization: Biltzinger et al., GCN Circ. 28112;
AGILE detection: Ursi et al., GCN Circ. 28116;
AstroSat CZTI detection: Gupta et al., GCN Circ. 28117)
was detected by Fermi (GBM trigger 616555602), Konus-Wind,
INTEGRAL (SPI-ACS), Mars-Odyssey (HEND), AGILE,
AstoSat (CZTI), and Swift (BAT) at about 5195 s UT (01:26:35).
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:
  139.332 (09h 17m 20s) -16.730 (-16d 43' 46")
 Corners:
  138.969 (09h 15m 53s) -16.190 (-16d 11' 23")
  139.223 (09h 16m 54s) -17.334 (-17d 20' 01")
  139.702 (09h 18m 48s) -17.266 (-17d 15' 58")
  139.445 (09h 17m 47s) -16.124 (-16d 07' 25")
 ---------------------------------------------
The error box area is 1939 sq. arcmin, and its maximum
dimension is 1.3 deg (the minimum one is 28 arcmin).
The Sun distance was 44 deg.

This box may be improved.

The localization is consistent with, but reduces
the area of, the final Fermi-GBM (GCN Circ. 28109) and
BALROG (GCN Circ. 28112) localizations.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB200716_T05194/IPN/

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