Simultaneous Exosat-IUE observations of NGC 4151

Details Simultaneous Exosat-IUE observations of NGC 4151 Simultaneous Exosat-IUE observations of NGC 4151

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..593p&link_type=abstract

(ESA, ESLAB Symposium on X-Ray Astronomy in the EXOSAT Era, 18th, The Hague, Netherlands, Nov. 5-9, 1984) Space Science Reviews

Astronomy and Astrophysics

Astronomy

2

Exosat Satellite, Iue, Seyfert Galaxies, Emission Spectra, Iron, Line Spectra, Nitrogen, Ultraviolet Spectra, X Rays

Scientific paper

NGC 4151 was observed four times in Nov. 83. The results indicate that: (1) there exists a correlation between the X-ray and UV fluxes on the long term; (2) the soft X-ray excess between 0.1 and 1 keV is probably steeper than expected from the leaky absorber model by Holt et al. (1980); (3) the spectral fit to the ME data, after correction for a soft component, yields α = 1.73±0.27, NH = (15.2±2.2)×1022cm-2, E.W.(Fe line) = 0.208±0.084 keV, and does not require a strong overabundance of Fe in the absorber. The relationship between NH and the strength of the broad emission lines is commented.

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