TITLE: GCN CIRCULAR NUMBER: 35654 SUBJECT: IPN triangulation of GRB 240125B (short) DATE: 24/01/30 19:43:07 GMT FROM: Dmitry Svinkin at Ioffe Institute svinkin@mail.ioffe.ru
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 240125B (Fermi-GBM detection: The Fermi GBM team, GCN 35634) was detected by Fermi (GBM trigger 727908527), and INTEGRAL (SPI-ACS) at about 74923 s UT (20:48:43).
We have triangulated it to a GBM-SPI-ACS annulus centered at RA(2000)=132.059 deg (08h 48m 14s) Dec(2000)=+85.090 deg (+85d 05' 24") whose radius is 34.188 +/- 6.337 deg (3 sigma).
The annulus combined with the Fermi-GBM final position (GCN 35634; glg_healpix_all_bn240125867_v00) and the Fermi Earth-occultation information gives 575 sq. deg (3 sigma) localization region.
A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB240125_T74922/IPN/
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