TITLE:   GCN CIRCULAR
NUMBER:  31078
SUBJECT: IPN triangulation of GRB 211106A (short)
DATE:    21/11/12 20:06:39 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>

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

K. Hurley, on behalf of the IPN,

S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu
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,

and

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

The short-duration GRB 211106A
(Swift-BAT-GUANO detection: Tohuvavohu et al., GCN 31049;
Konus-Wind detection: Ridnaia et al., GCN 31054;
Fermi-GBM sub-threshold detection: Fletcher et al., GCN 31055)
was detected by INTEGRAL (SPI-ACS), Swift (BAT), Konus-Wind,
and Fermi (GBM) at about 16651 s UT (04:37:31).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   342.487 (22h 49m 57s) -52.039 (-52d 02' 19")
  Corners:
   359.734 (23h 58m 56s) -61.384 (-61d 23' 04")
   333.528 (22h 14m 07s) -40.998 (-40d 59' 52")
   331.989 (22h 07m 57s) -42.431 (-42d 25' 51")
     0.415 (00h 01m 40s) -63.951 (-63d 57' 05")
  ---------------------------------------------
The error box area is 45.2 sq. deg, and its maximum
dimension is 27.7 deg (the minimum one is 1.7 deg).
The Sun distance was 95 deg.

The Swift-BAT position reported in Tohuvavohu et al.
is consistent with the IPN error box.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB211106_T16652/IPN/

The Swift (BAT) event data used for the IPN localization
came from the GUANO system (https://www.swift.psu.edu/guano/).