Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 32265

IPN triangulation of GRB 220624A
2022-06-24T22:08:37Z (2 years ago)
Anna Ridnaia at Ioffe Institute <>
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,


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

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
  179.348 (11h 57m 24s) +16.691 (+16d 41' 27")
  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

The Konus-Wind time history and spectrum will be given in a forthcoming
GCN Circular.
Looking for U.S. government information and services? Visit