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GCN Circular 37156

Subject
IPN triangulation of GRB 240810A (short)
Date
2024-08-12T21:23:24Z (5 months ago)
From
Anna Ridnaia at Ioffe Institute <ridnaia@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,

A. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin,
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 240810A
(Fermi-GBM detection: The Fermi GBM team, GCN 37133Loading...
 
 )
was detected by Fermi (GBM), Konus-Wind, INTEGRAL (SPI-ACS),
and Mars-Odyssey (HEND) at about 76039 s UT (21:07:19).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
 ---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
 ---------------------------------------------
 Center:
  146.339 (09h 45m 21s) -38.135 (-38d 08' 07")
 Corners:
  146.325 (09h 45m 18s) -38.221 (-38d 13' 16")
  146.211 (09h 44m 51s) -38.270 (-38d 16' 13")
  146.353 (09h 45m 25s) -38.050 (-38d 02' 58")
  146.467 (09h 45m 52s) -38.000 (-37d 60' 00")
 ---------------------------------------------
The error box area is 51 sq. arcmin, and its maximum
dimension is 20 arcmin (the minimum one is 3 arcmin).
The Sun distance was 53 deg.

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

This localization may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB240810_T76037/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.