[vsnet-grb-info 20827] IPN Triangulation of GRB 180703A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  22925
SUBJECT: IPN Triangulation of GRB 180703A
DATE:    18/07/07 08:32:45 GMT
FROM:    Anna Kozlova at Ioffe Institute  <ann_kozlova at 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,

A. Kozlova, 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 long duration GRB 180703A
(Fermi-LAT detection: Racusin et al., GCN Circ. 22883;
Fermi-GBM detection: Poolakkil and Meegan, GCN Circ. 22896;
AstroSat CZTI detection: Sharma et al., GCN Circ. 22900)
was detected by Fermi (GBM trigger 552344505), Konus-Wind,
INTEGRAL (SPI-ACS), Mars-Odyssey (HEND), and Swift (BAT),
at about 75700 s UT (21:01:40). The burst was outside the
coded field of view of the BAT.

We have triangulated it to a Konus-HEND annulus centered at
RA(2000)=312.437 deg (20h 49m 45s)  Dec(2000)=-22.995 deg (-22d 59' 40"),
whose radius is 54.738 +/- 1.217 deg (3 sigma).

The annulus is consistent with, but does not reduce the area of, the LAT
position reported by Racusin et al. (GCN Circ. 22883).

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB180703_T75705/IPN