Mysterious Broad Absorption Line Quasars (BALQSOs)

Details Mysterious Broad Absorption Line Quasars (BALQSOs) Mysterious Broad Absorption Line Quasars (BALQSOs)

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop..120m&link_type=abstract

XMM-Newton Proposal ID #04030401

Computer Science

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Fbqs J131213.5+, Xmm-Newton Proposal 04030401

Scientific paper

Just when we thought that the mystery of broad absorption line quasars is solved, new Chandra observations confront our understanding. Some BALQSOs appear unabsorbed in soft-X-rays and yet are X-ray weak. To understand these puzzling observations, we propose to observe a Chandra detected radio-loud BALQSO for precision spectroscopy with EPIC PN. With the high quality XMM spectrum we will uncover spectral complexity, if any, which mimics the unabsorbed spectral shape in the crude Chandra data. It would be even more interesting if the spectrum turns out to be truly unabsorbed, as it will completely shake the present hypothesis that BALQSOs are normal quasars viewed through special sightlines and will imply that radio-loud BALQSOs are a separate class, perhaps related to quasar evolution.

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