The selection criteria adopted for the Einstein Observatory Medium Sensitivity survey are delineated and the results of an analysis of the source-count relation for extragalactic X ray sources is presented. Only IPC fields at least 20 deg outside of the galactic plane, and then only those images in the center of the fields, were included. A total of 345 objects were sighted in the 0.3-3.5 keV energy interval, and 77 percent were concluded to be extragalactic. Most were associated with active galactic nuclei (AGN), including Seyfert galaxies and quasars, and galactic clusters. A slope of about 1.7 was calculated for the power law of the energy spectra of AGNs and close to 1.0 for clusters.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    The Euclidean slope of the X-ray source counts - A 'cosmic conspiracy'


    Beteiligte:
    Gioia, I. M. (Autor:in) / Maccacaro, T. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1984-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Interstellar Conspiracy

    L. Johnson / G. L. Matloff | NTIS | 2005


    The Interstellar Conspiracy

    Johnson, Les / Matloff, Gregory L. | NTRS | 2005


    USAir smells conspiracy

    Online Contents | 1996


    Source-Counts and Background Radiation

    Franceschini, A. / Aussel, H. / Bressan, A. et al. | British Library Online Contents | 1997