TITLE:   GCN CIRCULAR
NUMBER:  27385
SUBJECT: IPN triangulation of GRB 200313A
DATE:    20/03/15 16:56:10 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin@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,

D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Ridnaia,
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,

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  200313A
(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 27374;
Lesage and C. Meegan, GCN Circ. 27383;
BALROG localization: Biltzinger et al., GCN Circ. 27377)
has been detected by Fermi (GBM trigger 605756501), Konus-Wind,
INTEGRAL (SPI-ACS), and Mars-Odyssey (HEND), so far,
at about 6097 s UT (01:41:37).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    73.028 (04h 52m 06s) +24.623 (+24d 37' 24")
  Corners:
    73.480 (04h 53m 55s) +29.123 (+29d 07' 21")
    73.078 (04h 52m 19s) +35.837 (+35d 50' 13")
    72.077 (04h 48m 18s) +29.401 (+29d 24' 04")
    72.972 (04h 51m 53s) +19.772 (+19d 46' 18")
    74.907 (04h 59m 38s) +13.551 (+13d 33' 02")
    74.212 (04h 56m 51s) +20.241 (+20d 14' 26")
  ---------------------------------------------
The error box area is 18.9 sq. deg, and its maximum
dimension is 22 deg (the minimum one is 1.2 deg).
The Sun distance was 81 deg.

This box may be improved.

The localization is consistent with, but reduces
the area of, the final Fermi-GBM (GCN Circ. 27374) and
BALROG (GCN Circ. 27377) localizations.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB200313_T06098/IPN/

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