TITLE: GCN CIRCULAR NUMBER: 9049 SUBJECT: GRB 090328: IPN Triangulation DATE: 09/03/29 18:06:02 GMT FROM: Valerie Connaughton at MSFC S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, and T.Cline on behalf of the Konus-Wind team, A. von Kienlin, G. Lichti, A. Rau, and K. Hurley on behalf of the INTEGRAL SPI-ACS GRB team, and V. Connaughton, M. Briggs, and C. Meegan, on behalf of the Fermi GBM team, report: Konus-Wind and INTEGRAL (SPI-ACS) have so far observed the long bright GRB 090328 (McEnery et al. GCN 9044). We have triangulated this burst to a Konus-SPI-ACS annulus centered at RA(2000), Dec(2000) =26.911, +1.465, whose radius is 72.339 +/- 0.671 degrees (3 sigma). This annulus intersects the GBM localization, and the LAT localization lies 0.357 degrees from the center line of this annulus. A map is posted at http://www.ioffe.ru/LEA/GRBs/GRB090328_T34609/IPN/ showing the GBM contours (statistical) and best-fit position (diamond), the IPN annulus (solid line), and the LAT best-fit position (diamond) and error circle (68% CL, statistical). This map will also be posted at http://ssl.berkeley.edu/ipn3/090328 . The IPN localization may be improved.