activity
19952004
most citedThe X-ray evolving universe: (ionized) absorption and dust, from nearby Seyfert galaxies to high-redshift quasars

6 citations · 12 across the 5 of their papers we have counts for

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Showing 1995Show all

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astro-ph1995

Four new active galaxies with steep soft X-ray spectra

J. Greiner, R. Danner, N. Bade +3

We have discovered four AGN in the ROSAT all-sky-survey data with very steep X-ray spectra. We apply several models to these X-ray spectra with emphasis on warm absorber models whi…