[vsnet-grb-info 15152] IPN Triangulation of GRB 140621A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16444
SUBJECT: IPN Triangulation of GRB 140621A
DATE:    14/06/23 17:10:14 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, on behalf of the IPN team,

S. Barthelmy, J. Cummings, N. Gehrels, H. Krimm, and D. Palmer, on
behalf of the Swift-BAT team,

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, and

K. Yamaoka, M. Ohno, Y. Hanabata, Y. Fukazawa, T. Takahashi,
M. Tashiro, Y. Terada, T. Murakami, and K. Makishima
on behalf of the Suzaku WAM team, report:

The long-duration GRB 140621A has been observed by Konus-Wind, Fermi(GBM 
trigger 425073013), Swift (BAT), Suzaku (WAM), and INTEGRAL (SPI-ACS), 
so far, at about 71411 s UT (19:50:11). The burst was outside the coded 
field of view of the BAT.

We have triangulated it to a Konus-SPI-ACS annulus centered at 
RA(2000)=73.277 deg (04h 53m 07s)  Dec(2000)=+14.648 deg (+14d 38' 54"), 
whose radius is 46.161 ± 0.185 deg (3 sigma), and to a GBM-SPI-ACS 
annulus centered at RA(2000)=295.874 deg (19h 43m 30s) Dec(2000)=+52.624 
deg (+52d 37' 26"), whose radius is 73.043 ± 1.325 deg (3 sigma). These 
annuli intersect to form the error box whose  portion with declination 
lower than about 22.2 degrees is ruled out due to the BAT non-detection 
in the coded FoV.

The corners of the combined IPN+BAT box are:
   ---------------------------------------------
    RA(2000), deg                 Dec(2000), deg
   ---------------------------------------------
   Corners:
     24.883 (01h 39m 32s) +22.492 (+22d 29' 30")
     25.291 (01h 41m 10s) +22.804 (+22d 48' 16")
     25.278 (01h 41m 07s) +22.200 (+22d 12' 00")
     24.879 (01h 39m 31s) +22.200 (+22d 12' 00")
   ---------------------------------------------
The error box area is about 720 sq. arcmin, and its maximum
dimension is 43 arcmin.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB140621_T71407/IPN/

A Swift ToO observation has been requested.

The time history and spectrum will be given in a forthcoming GCN Circular.