TITLE: GCN CIRCULAR NUMBER: 44459 SUBJECT: IPN triangulation of GRB 260429A DATE: 26/05/04 15:06:16 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 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, 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, short-duration GRB 260429A (Ferm-GBM detection: The Fermi GBM team, GCN 44425; Scotton, GCN 44430; SVOM-GRM detection: Yu et al., GCN 44439) was detected by Fermi (GBM trigger 799197847), Konus-Wind, SVOM (GRM), and Mars-Odyssey (HEND) at about 84242 s UT (23:24:02). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 281.153 (18h 44m 37s) +17.279 (+17d 16' 44") Corners: 281.115 (18h 44m 28s) +17.444 (+17d 26' 37") 281.161 (18h 44m 39s) +17.398 (+17d 23' 52") 281.192 (18h 44m 46s) +17.114 (+17d 06' 50") 281.146 (18h 44m 35s) +17.160 (+17d 09' 36") --------------------------------------------- The error box area is 40 sq. arcmin, and its maximum dimension is 20 arcmin (the minimum one is 2.3 arcmin). The Sun distance was 109 deg. This localization may be improved. A triangulation map and HEALPix FITS files are posted at http://www.ioffe.ru/LEA/GRBs/GRB260429_T84245/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. View this GCN Circular online at https://gcn.nasa.gov/circulars/44459. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...