TITLE: GCN CIRCULAR NUMBER: 6241 SUBJECT: IPN triangulation of GRB070402 DATE: 07/04/03 22:04:55 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley and T. Cline, on behalf of the Mars Odyssey, Konus, and MESSENGER GRB teams, I. Mitrofanov, A. Kozyrev, M. Litvak, A. Sanin, V. Tret'yakov and A. Parshukov, on behalf of the HEND-Odyssey GRB team, W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on behalf of the GRS-Odyssey GRB team, S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, and D. Frederiks, on behalf of the Konus-Wind team, D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W. Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, and K. Yamaoka, E. Sonoda, M. Ohno, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada, T. Murakami, and K. Makishima, on behalf of the Suzaku WAM GRB team, report: Konus-Wind, Suzaku-WAM, INTEGRAL SPI-ACS, Mars Odyssey, and RHESSI observed the long-duration, hard spectrum GRB070402 at 56915 s. As observed by Konus, it had a duration ~12 s, a fluence ~10^-5 erg cm^-2, and an Epeak~350 keV. We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: RA(2000) Dec(2000) Center: 311.184 (20h 44m 44s) +27.404 (+27d 24' 14") Corners: 310.481 (20h 41m 55s) +26.971 (+26d 58' 16") 310.516 (20h 42m 04s) +27.237 (+27d 14' 14") 311.893 (20h 47m 34s) +27.822 (+27d 49' 20") 311.854 (20h 47m 25s) +27.560 (+27d 33' 36") The error box area is ~0.3 square arcminutes. MESSENGER data have not yet been downlinked; when they become available, it may be possible to reduce the size of this error box considerably.