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GCN Circular 33718

IPN triangulation of GRB 230430A (short)
2023-05-02T15:49:34Z (a year ago)
Dmitry Svinkin at Ioffe Institute <>
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,


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

The short-duration GRB 230430A
(Fermi-GBM detection: the Fermi GBM team, GCN Circ. 33713;
Mangan et al., GCN Circ. 33715;
AstroSat-CZTI detection: Navaneeth et al., GCN Circ. 33714)
was detected by Fermi (GBM trigger 704533643),
Konus-Wind, INTEGRAL (SPI-ACS), AstroSat (CZTI),
and Mars-Odyssey (HEND), at about 28039 s UT (07:47:19).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  RA(2000), deg                 Dec(2000), deg
  191.335 (12h 45m 20s) +33.912 (+33d 54' 42")
  191.333 (12h 45m 20s) +34.000 (+34d 00' 02")
  191.427 (12h 45m 42s) +34.079 (+34d 04' 45")
  191.338 (12h 45m 21s) +33.823 (+33d 49' 22")
  191.244 (12h 44m 58s) +33.743 (+33d 44' 36")
The error box area is 51 sq. arcmin, and its maximum
dimension is 22 arcmin (the minimum one is 3.2 arcmin).
The Sun distance was 125 deg.

This box may be improved.

The IPN localization is consistent with, but reduces the area of,
the Fermi-GBM final localization (GCN 33713).

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.

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