Extragalactic x-ray sources and their contribution to the diffuse background
Conference
·
· Int. Astron. Union Symp., no. 55, pp. 208-211
OSTI ID:4379436
From symposium X - and gamma -ray astronomy; Madrid, Spain (11 May 1972). See CONF-720599-. Estimates of the integrated contribution of extragalactic sources to the diffuse x-ray background in the 2 to 10-keV energy interval are presented. It appears that classes of objects already detected as x- ray sources easily account for at least l0% of the background. Quasistellar objects, and possibly Seyfert and radio galaxies might contribute a larger fraction of the background intensity. It is also suggested that several of the unidentified x-ray sources in the Uhuru catalog at high galactic latitudes may be bright QSO's as yet unknown. The detection of a larger number of QSO's in the x- ray band may allow a decisive test for the cosmological interpretation of the redshifts of QSO's. (auth)
- Research Organization:
- Univ., Bologna
- NSA Number:
- NSA-29-008504
- OSTI ID:
- 4379436
- Conference Information:
- Journal Name: Int. Astron. Union Symp., no. 55, pp. 208-211
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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