IPN triangulation of GRB 220305B

Report the long-duration GRB 220305B (Fermi GBM observation: Dunwoody et al., GCN Circ. 31689) has been detected by Fermi (GBM trigger 668172805), Konus-Wind, INTEGRAL (SPI-ACS), and Mars-Odyssey (HEND), so far, at about 41600 s UT (11:33:20). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 176.112 (11h 44m 27s) -32.550 (-32d 33' 01") Corners: 180.687 (12h 02m 45s) -27.127 (-27d 07' 36") 171.638 (11h 26m 33s) -36.980 (-36d 58' 48") 171.416 (11h 25m 40s) -37.080 (-37d 04' 47") 180.469 (12h 01m 53s) -27.299 (-27d 17' 57") --------------------------------------------- The error box area is 2893 sq. arcmin, and its maximum dimension is 12.7 deg (the minimum one is 4 arcmin). The Sun distance was 137 deg. This box may be improved. The IPN localization is consistent with, but reduces the area of, the Fermi GBM on-ground calculated location (GCN Circ. 31689). A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB220305_T41651/IPN/ The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.