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GCN Circular 31078

IPN triangulation of GRB 211106A (short)
2021-11-12T20:06:39Z (3 years ago)
Dmitry Svinkin at Ioffe Institute <>
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,


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
   342.487 (22h 49m 57s) -52.039 (-52d 02' 19")
   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

The Swift (BAT) event data used for the IPN localization
came from the GUANO system (
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