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GCN Circular 32265

Subject
IPN triangulation of GRB 220624A
Date
2022-06-24T22:08:37Z (2 years ago)
From
Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>
A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin
on behalf of the MGNS/BepiColombo and HEND/Mars Odyssey teams,

J. Benkhoff on behalf of the BepiColombo team,

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

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

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

and

W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr,
and A.S. Gardner on on behalf of the GRS-Odyssey GRB team,
report:

The long-duration GRB 220624A
(Fermi/GBM detection: Fermi GBM Team, GCN 32256;
AGILE detection: Ursi et al., GCN 32259;
AGILE/GRID detection: Verrecchia et al., GCN 32261;
Swift/BAT-GUANO detection: Tohuvavohu et al., GCN 32263)
has been detected by Fermi (GBM trigger 677732320),
Konus-Wind, Mars-Odyssey (HEND), BepiColombo (MGNS),
CALET (CGBM), AGILE (SA, MCAL, AC), and Swift (BAT),
so far, at about 10715 s UT (02:58:35).
The burst was outside the coded field of view of the BAT.

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
 ---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
 ---------------------------------------------
 Center:
  179.348 (11h 57m 24s) +16.691 (+16d 41' 27")
 Corners:
  179.501 (11h 58m 00s) +16.922 (+16d 55' 18")
  179.357 (11h 57m 26s) +16.791 (+16d 47' 29")
  179.194 (11h 56m 47s) +16.456 (+16d 27' 20")
  179.339 (11h 57m 21s) +16.590 (+16d 35' 25")
 ---------------------------------------------
The error box area is 91 sq. arcmin, and its maximum
dimension is 33 arcmin (the minimum one is 4 arcmin).
The Sun distance was 80 deg.

This box may be improved.

The IPN localization is consistent with, but reduces the area of, the
Fermi-GBM final localization (GCN 32256).

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB220624_T10712/IPN

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