TITLE: GCN CIRCULAR NUMBER: 21130 SUBJECT: IPN Triangulation of GRB 170522B (long/intense) DATE: 17/05/23 14:48:31 GMT FROM: Dmitry Svinkin at Ioffe Institute K. Hurley, on behalf of the IPN, I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin, on behalf of the HEND-Odyssey GRB team, D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Kozlova, and T. Cline on behalf of the Konus-Wind team, A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr, on behalf of the GRS-Odyssey GRB team, report: A long-duration, intense GRB 170522B has been detected by Konus-Wind, Mars-Odyssey (HEND), and INTEGRAL (SPI-ACS), so far, at about 84124 s UT (23:22:04). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 159.268 (10h 37m 04s) -34.716 (-34d 42' 56") Corners: 158.845 (10h 35m 23s) -35.550 (-35d 32' 58") 158.818 (10h 35m 16s) -35.346 (-35d 20' 45") 159.689 (10h 38m 45s) -33.872 (-33d 52' 21") 159.715 (10h 38m 52s) -34.080 (-34d 04' 47") --------------------------------------------- The error box area is 644 sq. arcmin, and its maximum dimension is 1.82 deg (the minimum one is 6.6 arcmin). The Sun distance was 109 deg. This box may be improved. A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB170522_T84124/IPN/ The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.