TITLE:   GCN CIRCULAR
NUMBER:  21515
SUBJECT: LIGO/Virgo G298048: IPN triangulation of Fermi/GBM trigger 524666471/170817529
DATE:    17/08/17 18:35:12 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>

D. Svinkin, K. Hurley, on behalf of the IPN,

A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,

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

A short-duration burst (Connaughton, LVC GCN Circ. 21506)
has been detected by Fermi (GBM; trigger 524666471),
and INTEGRAL (SPI-ACS), so far, at about 45666 s UT (12:41:06).

We have triangulated it to a GBM-INTEGRAL annulus centered at 
RA(2000)=119.131 deg (07h 56m 31s)  Dec(2000)=-44.133 deg (-44d 07' 
57"), whose radius is 73.554 +/- 19.687 deg (3 sigma). The annulus is 
consistent with the Fermi-GBM ground position 
(glg_loclist_all_bn170817529_v01.txt).

This annulus may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB170817_T45666/IPN/