TITLE:   GCN CIRCULAR
NUMBER:  16620
SUBJECT: IPN Triangulation of GRB 140721A
DATE:    14/07/22 20:41:48 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin@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,

G. Di Cocco, F. Fuschino, M. Galli, C. Labanti, and M. Marisaldi, on
behalf of the AGILE MCAL 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 140721A (Yu, GCN Circ. 16617) has been observed by 
Konus-Wind, Fermi(GBM trigger 427622605), MESSENGER (GRNS), AGILE (MCAL) 
and INTEGRAL (SPI-ACS), so far, at about 29002 s UT (08:03:22).

We have triangulated it to a preliminary, 3 sigma error box whose
coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   177.645 (11h 50m 35s) -37.735 (-37d 44' 06")
  Corners:
   181.410 (12h 05m 38s) -30.317 (-30d 19' 01")
   172.431 (11h 29m 43s) -44.878 (-44d 52' 41")
   174.251 (11h 37m 00s) -43.513 (-43d 30' 47")
   183.534 (12h 14m 08s) -27.322 (-27d 19' 20")
  ---------------------------------------------
The error box area is 8.7 sq. deg, and its maximum
dimension is 19.7 deg (the minimum one is 0.52 deg).

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB140721_T29009/IPN/

Details of the Konus-Wind observation will be given in a forthcoming GCN
Circular.