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GCN Circular 36650

IPN triangulation of GRB 240607A
2024-06-09T17:50:42Z (4 days ago)
Dmitry Svinkin at Ioffe Institute <>
legacy email
A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin
on behalf of the HEND/Mars Odyssey team,

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

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

E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,

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

G. Waratkar, V. Jethwani, J.Joshi, V. Bhalerao, D. Bhattacharya,
and S. Vadawale, on behalf of the Astrosat-CZTI 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 very bright, long-duration GRB 240607A
(Fermi-GBM detection: The Fermi GBM team, GCN 36634;
Dalessi, GCN 36637; Dalessi and Meegan, GCN 36641;
BALROG localization: Preis et al., GCN 36635;
AstroSat-CZTI detection detection: Waratkar et al., GCN 36638)
was detected by Fermi (GBM trigger 739450879), AstroSat (CZTI),
Konus-Wind, INTEGRAL (SPI-ACS), Swift (BAT), and Mars-Odyssey (HEND)
at about 39674 s UT (11:01:14).
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
   17.830 (01h 11m 19s) -29.324 (-29d 19' 25")
   17.686 (01h 10m 45s) -29.329 (-29d 19' 45")
   18.025 (01h 12m 06s) -29.401 (-29d 24' 04")
   17.974 (01h 11m 54s) -29.317 (-29d 19' 03")
   17.634 (01h 10m 32s) -29.245 (-29d 14' 41")
The error box area is 78 sq. arcmin, and its maximum
dimension is 22 arcmin (the minimum one is 4.2 arcmin).
The Sun distance was 76 deg.

The IPN localization is consistent with, but reduces the area of,
the Fermi-GBM final and the BALROG localizations.

This localization may be improved.

A triangulation map and HEALPix FITS file are posted at
The HEALPix triangulation map is the multi-order HEALPix in units of probability density.

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

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