TITLE: GCN CIRCULAR NUMBER: 32545 SUBJECT: IPN triangulation of GRB 220905A DATE: 22/09/11 20:08:57 GMT FROM: Anna Ridnaia at Ioffe Institute A. Ridnaia, D. Frederiks, D. Svinkin, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, A. Goldstein, M. S. Briggs, and C. Wilson-Hodge on behalf of the Fermi GBM team, E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, report: The long-duration GRB 220905A (Fermi-GBM detection: Fermi GBM Team, GCN Circ. 32518, BALROG localization: Biltzinger et al., GCN Circ. 32519) was detected by Fermi (GBM trigger 684070128), INTEGRAL (SPI-ACS), Konus-Wind, and Swift (BAT) at about 41324 s UT (11:28:44). 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: 338.931 (22h 35m 43s) -37.594 (-37d 35' 38") Corners: 341.100 (22h 44m 24s) -39.495 (-39d 29' 42") 341.797 (22h 47m 11s) +6.185 ( +6d 11' 06") 336.870 (22h 27m 29s) -35.655 (-35d 39' 18") 289.822 (19h 19m 17s) -23.843 (-23d 50' 36") --------------------------------------------- The error box area is 349.6 sq. deg, and its maximum dimension is 87.7 deg (the minimum one is 5 deg). The Sun distance was 125 deg. This box may be improved. The IPN localization is consistent with, but reduces the area of, the Fermi GBM Final Real-time position (GCN Circ. 31955) and BALROG (GCN 31950) localizations. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB220905_T41330/IPN The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.