TITLE:   GCN CIRCULAR
NUMBER:  20661
SUBJECT: IPN Triangulation of GRB 170210A
DATE:    17/02/10 23:46:11 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,

S. Barthelmy, J. Cummings, N. Gehrels, 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 long-duration GRB 170210A (Roberts and Mailyan, GCN Circ. 20660) has 
been detected by Fermi(GBM), Konus-Wind, Mars-Odyssey (HEND), and Swift 
(BAT), so far, at about 10056 s UT (02:47:36).
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:
    226.055 (15h 04m 13s) -65.101 (-65d 06' 02")
   Corners:
    228.764 (15h 15m 03s) -63.914 (-63d 54' 51")
    228.302 (15h 13m 12s) -64.342 (-64d 20' 31")
    223.147 (14h 52m 35s) -66.193 (-66d 11' 35")
    223.706 (14h 54m 49s) -65.801 (-65d 48' 04")
   ---------------------------------------------
The error box area is 1731 sq. arcmin, and its maximum
dimension is 3.28 deg (the minimum one is 10.1 arcmin).
The Sun distance was 80 deg.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB170210_T10092/IPN

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