[vsnet-grb-info 27865] IPN triangulation of GRB 210506A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  29968
SUBJECT: IPN triangulation of GRB 210506A
DATE:    21/05/08 22:49:09 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin at 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

S. Xiao, S. L. Xiong, X. B. Li, Y. Huang, and S. N. Zhang,
on behalf of the Insight-HXMT team, report:

The short-duration GRB 210506A
(Swift/BAT-GUANO detection: Tohuvavohu et al., GCN Circ. 29947)
was detected by Swift (BAT), INTEGRAL (SPI-ACS), Insight-HXMT (HE),
and Konus-Wind at about 2388 s UT (00:39:48).

We have triangulated it to a preliminary, error box
whose coordinates are:
  ------------------------------------
   RA(2000), deg       Dec(2000), deg
  ------------------------------------
  Corners:
     224.231           -32.736
     175.778           -26.218
     177.243           -30.663
     225.586           -36.393
  ------------------------------------
The error box area is about 160 sq. deg, and its maximum
dimension is 43 deg (the minimum one is 3.7 deg).
The Sun distance was 93 deg.

This box may be improved.

The IPN box is consistent with the Fermi-GBM nondetection,
inconsistent with the BAT-GUANO localization, and
is outside the BAT coded FoV.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB210506_T02388/IPN/