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GCN Circular 36618

Subject
IPN triangulation of GRB 240603A
Date
2024-06-05T12:19:02Z (8 days ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
Via
Web form
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,

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 short-duration GRB 240603A
(GECAM-B detection: Wang et al., GCN 36602;
Fermi-GBM detection: The Fermi GBM team, GCN 36608)
was detected by Fermi (GBM trigger 739074458), Konus-Wind
INTEGRAL (SPI-ACS), GECAM-B, and Mars-Odyssey (HEND)
at about 8853 s UT (02:27:33).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
 ---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
 ---------------------------------------------
 Center:
  328.634 (21h 54m 32s) -24.049 (-24d 02' 58")
 Corners:
  329.538 (21h 58m 09s) -25.739 (-25d 44' 21")
  329.570 (21h 58m 17s) -25.919 (-25d 55' 10")
  327.632 (21h 50m 32s) -22.008 (-22d 00' 28")
  327.575 (21h 50m 18s) -21.746 (-21d 44' 44")
 ---------------------------------------------
The error box area is 821 sq. arcmin, and its maximum
dimension is 4.56 deg (the minimum one is 3.2 arcmin).
The Sun distance was 110 deg.

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

This localization may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB240603_T08857/IPN
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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