The results of the initial stage of the CfA survey of quasar energy distributions are reviewed. Einstein imaging proportional counter spectra of 33 quasars have been studied by fitting a single power law slope and absorption by an equivalent column density of neutral hydrogen. Comparison with the higher energy HEAO-A2 data leads to a two-component model for the X-ray spectrum. The X-ray column density is systematically lower than the 21-cm measured Galactic column density along the same line of sight.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Einstein spectra of quasars


    Contributors:

    Published in:

    Publication date :

    1988-01-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Einstein spectra of quasars

    Wilkes, Belinda J. | Elsevier | 1988



    The First Stars and Quasars

    Loeb, A. / European Space Agency | British Library Conference Proceedings | 1998


    Veel ophef rond 'naakte quasars'

    Online Contents | 1995


    Formation of the First Stars and Quasars

    Haiman, Z. / InternationaL Council of Scientific Unions; Committee on Space Research; Scientific Commission E | British Library Conference Proceedings | 1999