TITLE:   GCN CIRCULAR
NUMBER:  35430
SUBJECT: IPN triangulation of GRB 231224A (short)
DATE:    23/12/27 12:51:08 GMT
FROM:    Dmitry Svinkin at Ioffe Institute <dmitrysvinkin@gmail.com>

D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko,
on behalf of the IPN,

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

and

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

The short-duration GRB 231224A
(Fermi-GBM detection: The Fermi GBM team, GCN 35426)
was detected by Fermi (GBM trigger 725143760) and
INTEGRAL (SPI-ACS) at about 74956 s UT (20:49:16).

We have triangulated it to a GBM-SPI-ACS annulus centered at
RA(2000)=230.929 deg (15h 23m 43s) Dec(2000)=-83.517 deg (-83d 30' 60"),
whose radius is 32.644 +/- 5.664 deg (3 sigma).

The annulus combined with the Fermi-GBM final position (GCN 35426;
glg_healpix_all_bn231224868_v00) gives ~792 sq. deg (3 sigma) localization region.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB231224_T74955/IPN/