The spectrum of the 1.0–8.0 keV cosmic X-ray background ( CXB ) at galactic latitudes > | 25 | ^ { \circ } has been measured using the BeppoSAX LECS and MECS instruments .
The spectrum is consistent with a power-law of photon index 1.40 \pm 0.04 and normalization 11.7 \pm 0.5 photon cm ^ { -2 } s ^ { -1 } keV ^ { -1 } sr ^ { -1 } at 1 keV .
Our results are in good agreement with previous ROSAT PSPC ( Georgantopuolos et al .
1996 ) , ASCA GIS ( [ Miyaji et al .
1998 ] ) and rocket ( McCammon & Sanders 1990 ) measurements .
On the contrary , previous measurements with the HEAO1 A2 ( [ Marshall et al .
1980 ] ) and the ASCA SIS ( Gendreau et al .
1995 ) instruments , are characterized by normalizations which are respectively 35 % and 25 % smaller than ours .