[vsnet-grb-info 26774] IPN triangulation of GRB 201109A (short)

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28877
SUBJECT: IPN triangulation of GRB 201109A (short)
DATE:    20/11/10 23:38:09 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin at mail.ioffe.ru>

D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Ridnaia,
and T. Cline on behalf of the Konus-Wind team,

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,

and

A. Goldstein, M. S. Briggs, and C. Wilson-Hodge
on behalf of the Fermi GBM team, report:

The short-duration GRB 201109A
(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 28868;
Malacaria et al., GCN Circ. 28874)
was detected by Fermi (GBM trigger 626581870),
INTEGRAL (SPI-ACS), and Konus-Wind
at about 9066 s UT (02:31:06).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   138.382 (09h 13m 32s)  -9.192 ( -9d 11' 31")
  Corners:
   140.147 (09h 20m 35s)  -6.874 ( -6d 52' 27")
   139.193 (09h 16m 46s)  -6.204 ( -6d 12' 13")
   136.612 (09h 06m 27s) -11.514 (-11d 30' 52")
   137.577 (09h 10m 19s) -12.196 (-12d 11' 46")
  ---------------------------------------------
The error box area is 6.75 sq. deg, and its maximum
dimension is 6.2 deg (the minimum one is 1.15 deg).
The Sun distance was 83 deg.

This box may be improved.

The IPN localization is consistent with, but reduces the area of, the 
Fermi-GBM final position (GCN Circ. 28868).

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB201109_T09065/IPN

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