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X-Ray Insights into the Nature of Quasars with Redshifted Broad Absorption Lines

  • Authors: Ning-Xiao Zhang, W. N. Brandt, N. S. Ahmed, P. B. Hall, B. Luo, Scott F. Anderson, N. Filiz Ak, P. Petitjean, D. P. Schneider, Yue Shen, and R. Srianand

2017 The Astrophysical Journal 839 101.

  • Provider: AAS Journals

Caption: Figure 5.

Combined SEDs of the seven RSBALs. The IR-to-X-ray SED data are from WISE (red), 2MASS (brown), SDSS (blue), GALEX (magenta), and Chandra (green). The green segment represents the Chandra bandpass in the rest frame with an average redshift (z = 1.747) of our targets. The Galactic extinction has been corrected for each band. All of our targets have been normalized to the composite SED (dashed line) of optically luminous quasars (Richards et al. 2006) at 3000 Å (corresponding to 1015 Hz). The data points from GALEX and SDSS u-band for quasars with redshifts above 0.9 and 2.2, respectively, are removed due to the possible presence of a Lyman break feature at rest-frame 912 Å (the vertical dashed line at ﹩3.3\times {10}^{15}﹩ Hz). The blue solid line represents the mean SED of BAL quasars from Gallagher et al. (2007). All of our RSBAL targets are significantly X-ray weak relative to the mean SED of normal quasars and are consistent with the mean SED of BAL quasars.

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