Soft X-ray loud broad absorption-line quasars

Details Soft X-ray loud broad absorption-line quasars Soft X-ray loud broad absorption-line quasars

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop..170g&link_type=abstract

XMM-Newton Proposal ID #06061902

Physics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Sdss J101949.75

Scientific paper

We have discovered three soft X-ray loud broad absorption-line quasars, based on the ROSAT data. The conundrum posed by this new class of AGN is how can a BAL region coexist with a powerful source of X-rays, since even a modest flux of X-rays will over-ionize the gas making it impossible to form Li-like atoms. We propose three short XMM-Newton observations of these three objects to determine their spectral nature (soft or hard) and to identify the possible origin of X-ray emissions.

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