TITLE: GCN CIRCULAR NUMBER: 32117 SUBJECT: IPN triangulation of GRB 220524B DATE: 22/05/25 21:42:09 GMT FROM: Dmitry Svinkin at Ioffe Institute 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, 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 long-duration GRB 220524B was detected by Konus-Wind, INTEGRAL (SPI-ACS), and Mars-Odyssey (HEND) at about 57898 s UT (16:04:58). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 70.274 (04h 41m 06s) -19.486 (-19d 29' 11") Corners: 70.075 (04h 40m 18s) -21.168 (-21d 10' 04") 70.146 (04h 40m 35s) -21.193 (-21d 11' 34") 70.452 (04h 41m 49s) -17.794 (-17d 47' 37") 70.382 (04h 41m 32s) -17.767 (-17d 46' 01") --------------------------------------------- The error box area is 840 sq. arcmin, and its maximum dimension is 3.43 deg (the minimum one is 4.1 arcmin). The Sun distance was 40 deg. This box may be improved. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB220524_T57898/IPN The time history and spectrum will be given in forthcoming GCN Circulars.