Intensity of the cosmic X-ray backgound from HEAO1/A2 experiment

Details Intensity of the cosmic X-ray backgound from HEAO1/A2 experiment Intensity of the cosmic X-ray backgound from HEAO1/A2 experiment

2004-12-13

arxiv.org/abs/astro-ph/0412304v2

Astronomy and Astrophysics

Astrophysics

5 pages, accepted for publication in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20042526

We reanalyze data of HEAO1/A2 -- Cosmic X-ray Experiment -- in order to repeat the measurements of the cosmic X-ray background (CXB) intensity and accurately compare this value with other measurements of the CXB. We used the data of MED, HED1 and HED3 detectors in scan mode, that allowed us to measure effective solid angles and effective areas of detectors self consistently, in the same mode as the CXB intensity was measured. We obtained the average value of the CXB intensity is 1.96+/-0.10 x10^{-11} erg/s/cm2/deg2 in the energy band 2-10 keV, or 9.7+/-0.5 phot/s/cm2/sr at 1 keV assuming the power law spectral shape with photon index Gamma=1.4 in this energy band. We compare the obtained measurements with those obtained by different instruments over last decades.

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