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An unusual iron Lo-BAL quasar detected by ISOCAM

P. -A. Duc·P. B. Hall·D. Fadda·P. Chanial·D. Elbaz·P. Monaco·E. Pompei·B. M. Poggianti·H. Flores·A. Franceschini·A. Biviano·A. Moorwood·C. Cesarsky
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Abstract

We report the discovery of an unusual low--ionization broad absorption line quasar at z=1.776 which exhibits absorption lines from many excited states of Feii. This member of the rare class of 'FeLoBAL' quasars was serendipitously found in a mid-infrared (MIR) survey of distant clusters carried out with the ISOCAM camera. ISO J005645.1-273816 has a high MIR to UV luminosity ratio, suggesting a strong dust obscuration plus emission from very hot dust. This characteristic makes MIR surveys particularly efficient at detecting LoBAL quasars.

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P. -A. Duc, P. B. Hall, D. Fadda, P. Chanial, D. Elbaz, P. Monaco, E. Pompei, B. M. Poggianti, H. Flores, A. Franceschini, A. Biviano, A. Moorwood, C. Cesarsky. 2002-05-02. An unusual iron Lo-BAL quasar detected by ISOCAM. https://doi.org/10.1051/0004-6361%3A20020663

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