TITLE: GCN CIRCULAR NUMBER: 7256 SUBJECT: IPN localization of very hard GRB 080204 DATE: 08/02/05 17:57:16 GMT FROM: Valentin Pal'shin at Ioffe Inst S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks on behalf of the Konus-Wind team, K. Hurley and T. Cline on behalf of the Mars Odyssey, Konus, and MESSENGER GRB teams, W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on behalf of the GRS-Odyssey GRB team, I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin, on behalf of the HEND-Odyssey GRB team, K. Yamaoka, M. Ohno, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada, T. Murakami, and K. Makishima on behalf of the Suzaku WAM team, A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, M. Marisaldi, F. Fuschino, M. Galli, C. Labanti, E. Del Monte, F. Lazzarotto, L. Pacciani, P. Soffitta on behalf of the AGILE team, and J. Cummings, S. Barthelmy, N. Gehrels, and H. Krimm, on behalf of the Swift-BAT team, report: Mars Odyssey (GRS), Konus-Wind, Suzaku-WAM, INTEGRAL SPI-ACS, AGILE-MCAL, SuperAGILE, and Swift-BAT observed the long-duration, hard spectrum GRB 080204 at about 50192 s UT (13:56:32). The burst was outside the coded field of view of the BAT and SuperAGILE. The burst light curve shows a short precursor, followed in ~3 sec by a single multipeaked pulse with a duration of ~15 sec. There is a sign of extended emission seen up to T-T0~80 s in the Konus-Wind soft band. We have triangulated the burst to the following, preliminary 3-sigma error box: ----------------------------------------------- RA(2000), deg Dec(2000), deg ----------------------------------------------- Center: 285.566 (19h 02m 16s) -62.896 (-62d 53' 44") Corners: 287.728 (19h 10m 55s) -62.334 (-62d 20' 01") 283.813 (18h 55m 15s) -63.453 (-63d 27' 12") 283.277 (18h 53m 07s) -63.402 (-63d 24' 08") 287.212 (19h 08m 51s) -62.305 (-62d 18' 18") ----------------------------------------------- The error box area is 1212 sq. arcmin. This error box may be improved Preliminary analysis of the Konus-Wind data yields a burst fluence of ~4x10^-5 erg/cm2 (in the 20 keV - 4 MeV range), and a very hard energy spectrum with an Epeak of the main pulse of ~1.4 MeV. Detailed spectral parameters will be reported later.