TITLE: GCN CIRCULAR NUMBER: 8905 SUBJECT: IPN localization of GRB 090217 DATE: 09/02/18 19:55:40 GMT FROM: Valentin Pal'shin at Ioffe Inst I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin, 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, D. Frederiks, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, K. Yamaoka, M. Ohno, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada, T. Murakami, K. Makishima, and Y. Hanabata on behalf of the Suzaku-WAM team, A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS and GRB team, and K. Hurley, on behalf of the INTEGRAL SPI-ACS and Odyssey GRB teams, report: Suzaku-WAM, Konus-Wind, INTEGRAL-SPI-ACS, and Mars Odyssey observed the long GRB 090217 at about 04:56:42 UT (corresponding to the Fermi/GBM trigger 256539404/ 090217206: von Kienlin, GCN 8902; also detected by Fermi/LAT: Ohno et al., GCN 8903). The burst light curve shows a multipeaked structure with a total duration of ~40 sec. Triangulation gives a MO-Konus annulus centered at RA(2000)=132.322 (08h 49m 17s) Dec(2000)=+18.838 (+18d 50' 18"), whose radius is 76.132 +/- 0.104 deg (3 sigma), and a Konus-WAM annulus centered at RA(2000)=135.708 (09h 02m 50s) Dec(2000)=+21.300 (+21d 17' 59"), whose radius is 73.641 ± 0.941 deg (3sigma). These annuli intersect at grazing incidence to form two long error boxes, one of which may be eliminated by the Konus ecliptic latitude response. The resulting error box has the coordinates: ----------------------------------------------------- RA(2000), deg Dec(2000), deg ----------------------------------------------------- Center: 204.865 (13h 39m 28s) -7.442 (-07d 26' 31") Corners: 212.234 (14h 08m 56s) +13.782 (+13d 46' 57") 199.337 (13h 17m 21s) -19.856 (-19d 51' 21") 197.625 (13h 10m 30s) -22.539 (-22d 32' 21") 210.398 (14h 01m 36s) + 8.568 (+08d 34' 06") ----------------------------------------------------- The error box area is 7.2 sq. deg. This box may be improved. The box is consistent with the LAT location (Ohno et al., GCN 8903). The center line of the MO-Konus annulus passes 0.385 degrees from the center of the Fermi/LAT error circle, and the annulus intersects the 90% containment error circle at: ----------------------------------------------------- RA(2000), deg Dec(2000), deg ----------------------------------------------------- 204.800 (13h 39m 12s) -7.890 (-07d 53' 22") 204.505 (13h 38m 01s) -8.057 (-08d 03' 24") 204.471 (13h 37m 53s) -8.701 (-08d 42' 04") 204.375 (13h 37m 30s) -8.379 (-08d 22' 45") ---------------------------------------------------- The K-W light curve of this GRB and IPN triangulation map is available at http://www.ioffe.ru/LEA/GRBs/GRB090217_T17804/