Letter to the Editor
The BeppoSAX 1-8 keV cosmic background spectrum
A. Vecchi 1,
S. Molendi 1,
M. Guainazzi 2,
F. Fiore 3 and
A.N. Parmar 2
Received 9 August 1999 / Accepted 28 August 1999
The spectrum of the 1.0-8.0 keV cosmic X-ray background (CXB) at galactic latitudes has been measured using the BeppoSAX LECS and MECS instruments. The spectrum is consistent with a power-law of photon index and normalization 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.
Key words: cosmology: diffuse radiation X-rays: general
Send offprint requests to: S. Molendi (email@example.com)
This article contains no SIMBAD objects.
© European Southern Observatory (ESO) 1999
Online publication: September 13, 1999