[vsnet-grb-info 15045] IPN Triangulation of GRB 140528A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16339
SUBJECT: IPN Triangulation of GRB 140528A
DATE:    14/05/29 16:23:35 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin at mail.ioffe.ru>

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

K. Hurley and J. Goldsten, on behalf of the MESSENGER NS GRB 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 140528A has been observed by Fermi (GBM: trigger 
423000325), Konus-Wind, INTEGRAL (SPI-ACS), and MESSENGER (GRNS), so 
far, at about 72323 s UT (20:05:23).

We have triangulated it to a preliminary, 3 sigma error box whose 
coordinates are:
   ---------------------------------------------
    RA(2000), deg                 Dec(2000), deg
   ---------------------------------------------
   Center:
    280.731 (18h 42m 55s) -59.080 (-59d 04' 47")
   Corners:
    281.417 (18h 45m 40s) -58.757 (-58d 45' 25")
    281.160 (18h 44m 38s) -59.219 (-59d 13' 09")
    280.032 (18h 40m 08s) -59.394 (-59d 23' 38")
    280.306 (18h 41m 13s) -58.938 (-58d 56' 16")
   ---------------------------------------------
The error box area is 864 sq. arcmin, and its maximum dimension is 57 
arcmin (the minimum one is 24 arcmin).

The center of the GBM ground position (given in 
glg_tcat_all_bn140528837_v01.fit) is 1.29 deg from the center of the box.

This box may be improved.

A triangulation map is posted at 
http://www.ioffe.ru/LEA/GRBs/GRB140528_T72325/IPN/

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