Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..961l&link_type=abstract
In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 2: AGN and the X Ray Background p 961-967 (SEE N90-258
Astronomy and Astrophysics
Astronomy
11
Exosat Satellite, Iron, Line Spectra, Spectral Signatures, Spectrum Analysis, Background Radiation, Emission Spectra, Seyfert Galaxies, Spectral Resolution, Statistical Analysis, Stellar Luminosity
Scientific paper
The results of the search for iron features performed on 40 of the 48 EXOSAT spectral survey sources are discussed. In thrirteen of the sources the spectral fit was improved by the inclusion of an iron emission line at approximately 6.5 keV. In three of these, an ionized absorption edge improved the spectral fit. In one source, the spectral fit was improved by the addition of a cold iron absorption edge at approximately 7.1 keV. Line equivalent widths are not well determined. A statistical analysis of the line fits suggest an inverse correlation between line equivalent width and intrinsic source luminosity. Comparison of the host galaxy axial ratio with the line equivalent width suggests that larger equivalent widths occur in sources with more nearly face on host galaxies.
Leighly Karen M.
Pounds Kenneth A.
Turner Tracey Jane
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