TITLE: GCN CIRCULAR NUMBER: 35627 SUBJECT: IPN triangulation of GRB 240123C (short) DATE: 24/01/25 11:35:17 GMT FROM: Anna Ridnaia at Ioffe Institute <ridnaia@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, A. Ridnaia, D. Frederiks, D. Svinkin, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT 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 short-duration GRB 240123C was detected by Konus-Wind, INTEGRAL (SPI-ACS), Swift (BAT), and Mars-Odyssey (HEND) at about 83553 s UT (23:12:33). The burst was outside the coded field of view of the BAT. We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 244.077 (16h 16m 19s) -58.857 (-58d 51' 25") Corners: 240.883 (16h 03m 32s) -55.715 (-55d 42' 55") 241.066 (16h 04m 16s) -56.037 (-56d 02' 14") 248.066 (16h 32m 16s) -61.657 (-61d 39' 24") 247.747 (16h 30m 59s) -61.386 (-61d 23' 11") --------------------------------------------- The error box area is 1219 sq. arcmin, and its maximum dimension is 7.0 deg (the minimum one is 3 arcmin). The Sun distance was 58 deg. This localization may be improved. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB240123_T83553/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/35627. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...