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GCN Circular 38300

Subject
IPN triangulation of GRB 241117A
Date
2024-11-22T17:46:13Z (12 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. Lysenko, A. Ridnaia,
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, 

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 (or possible short GRB with extended emission)
GRB 241117A (Fermi-GBM detection: The Fermi GBM team, GCN 38258Not found
 
 
;
Scotton and Meegan, GCN 38265Not found
 
 
;
SVOM-GRM detection: Wang et al., GCN 38266Not found
 
 
;
Swift-BAT/GUANO detection: Ronchini et al., GCN 38273Not found
 
 
)
was detected by Fermi (GBM trigger 753505248), Konus-Wind,
SVOM (GRM), INTEGRAL (SPI-ACS), Swift (BAT),
and Mars-Odyssey (HEND), at about 10843 s UT (03:00:43).
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:
    2.489 (00h 09m 57s) +16.049 (+16d 02' 55")
 Corners:
    2.124 (00h 08m 30s) +16.504 (+16d 30' 14")
    1.993 (00h 07m 58s) +16.881 (+16d 52' 52")
    2.859 (00h 11m 26s) +15.576 (+15d 34' 33")
    3.003 (00h 12m 01s) +15.166 (+15d 09' 59")
 ---------------------------------------------
The error box area is 557 sq. arcmin, and its maximum
dimension is 1.97 deg (the minimum one is 6 arcmin).
The Sun distance was 130 deg.

This localization may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB241117_T10845/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.