TITLE: GCN CIRCULAR NUMBER: 14001 SUBJECT: IPN Triangulation of GRB 121122A (long/intense) DATE: 12/11/26 20:19:40 GMT FROM: Dmitry Svinkin at Ioffe Institute K. Hurley and J. Goldsten, on behalf of the MESSENGER GRNS GRB team, S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, V. Connaughton, M. Briggs, C. Meegan, and V. Pelassa, on behalf of the Fermi GBM team, A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, K. Yamaoka, M. Ohno, Y. Hanabata, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada, T. Murakami, and K. Makishima, on behalf of the Suzaku WAM team, S. Barthelmy, J. Cummings, N. Gehrels, H. Krimm, and D. Palmer, on behalf of the Swift-BAT team, report: A long-duration, intense GRB 121122A with strong spectral evolution was observed by Konus-Wind, Fermi (GBM: trigger 375311695), INTEGRAL (SPI-ACS), MESSENGER (GRNS), Swift (BAT), and Suzaku (WAM), at about 76493 s UT (21:14:53). 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: 35.262 (02h 21m 03s) +45.139 (+45d 08' 21") Corners: 50.638 (03h 22m 33s) +46.661 (+46d 39' 39") 46.318 (03h 05m 16s) +47.134 (+47d 08' 01") 25.058 (01h 40m 14s) +40.194 (+40d 11' 39") 27.431 (01h 49m 44s) +41.325 (+41d 19' 31") --------------------------------------------- The error box area is 6.9 sq. deg, and its maximum dimension is 19.6 deg (the minimum one is 2.1 deg, the minimum annulus width is 0.2 deg). This box can be improved. A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB121122_T76497/IPN/ The time history and spectrum will be given in a forthcoming GCN Circular.