[vsnet-grb-info 15333] IPN Triangulation of GRB 140723A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16625
SUBJECT: IPN Triangulation of GRB 140723A
DATE:    14/07/23 18:20:26 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin at mail.ioffe.ru>

K. Hurley and J. Goldsten, on behalf of the MESSENGER NS GRB team,

S. Golenetskii, R. Aptekar, V. Pal'shin, D. Frederiks, D. Svinkin, and 
T. Cline on behalf of the Konus-Wind 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

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

The long-duration GRB 140723A (Bissaldi et al., GCN Circ. 16623) has 
been observed by Konus-Wind, Fermi(GBM trigger 427772193), MESSENGER 
(GRNS), and INTEGRAL (SPI-ACS), so far, at about 5791 s UT (01:36:31).

We have triangulated it to a GBM-MESSENGER annulus centered at 
RA(2000)=284.016 deg (18h 56m 04s) Dec(2000)=-22.344 deg (-22d 20' 38"), 
whose radius is 72.790 + / - 0.166 deg (3 sigma).

The LAT error circle (that is RA, Dec, RErr = 210.63, -3.73, 0.35), 
whose area is 0.4 sq. deg, is mainly outside the annulus. The distance 
between the annulus center line and the center of the LAT position is 
0.43 deg.

This localization may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB140723_T05790/IPN/