TITLE: GCN CIRCULAR NUMBER: 35304 SUBJECT: IPN triangulation of GRB 231205A DATE: 23/12/07 16:20:39 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 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, S.-L. Xiong, Y. Huang, X.-Y. Zhao, and P. Wang on behalf of the GECAM 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 231205A (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 35263; GECAM-B detection: Tan et al., GCN Circ. 35266; ETJASMIN localization: Zhang et al., GCN Circ. 35268) has been detected by Fermi-GBM (trigger 723435916), Konus-Wind, INTEGRAL (SPI-ACS), GECAM-B (GRD), and Mars-Odyssey (HEND) so far, at about 8711 s UT (02:25:11). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 202.936 (13h 31m 45s) +17.932 (+17d 55' 55") Corners: 203.258 (13h 33m 02s) +18.299 (+18d 17' 58") 202.683 (13h 30m 44s) +17.694 (+17d 41' 38") 202.612 (13h 30m 27s) +17.557 (+17d 33' 25") 203.188 (13h 32m 45s) +18.166 (+18d 09' 57") --------------------------------------------- The error box area is 119 sq. arcmin, and its maximum dimension is 58 arcmin (the minimum one is 2.4 arcmin). The Sun distance was 62 deg. This localization may be improved. The IPN localization is consistent with, but reduces the area of, the Fermi-GBM final localization and ETJASMIN localization. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB231205_T08710/IPN 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/35304. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...