TITLE: GCN CIRCULAR NUMBER: 38399 SUBJECT: IPN triangulation of GRB 241128B DATE: 24/11/30 21:38:39 GMT FROM: Dmitry Svinkin at Ioffe Institute svinkin@mail.ioffe.ru

A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the MGNS/BepiColombo and HEND/Mars Odyssey teams,

J. Benkhoff on behalf of the BepiColombo team,

D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, and T. Cline on behalf of the Konus-Wind team,

E. Burns on behalf of the IPN,

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 bright, long-duration GRB 241128B (SVOM-GRM detection: Xue et al., GCN 38389) Konus-Wind, INTEGRAL (SPI-ACS), SVOM (GRM), Mars-Odyssey (HEND), and BepiColombo (MGNS), at about 19346 s UT (05:22:26).

We have triangulated it to a preliminary, 3 sigma error region whose area is 880 sq. arcmin, and its maximum dimension is 7.9 deg (the minimum one is 2.1 arcmin).

This localization may be improved.

A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB241128_T19346/IPN The HEALPix triangulation maps are in units of probability density.

The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.

View this GCN Circular online at https://gcn.nasa.gov/circulars/38399. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...