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Table 7.
Properties of composite spectra for sources in the three redshift ranges.
| z range | α | NH | EW |
|---|---|---|---|
| 1022 cm−2 | keV | ||
| lowz | 0.52 ± 0.03 | 0.4 ± 0.4 | 0.14 ± 0.04 |
| midz | = | 1.0 ± 0.4 | 0.13 ± 0.04 |
| highz | = | 3.4 ± 0.5 | 0.12 ± 0.04 |
Notes. The continuum slopes for the three spectra are assumed to be identical and tied together in the fit. The above results on the Fe K lines are obtained, assuming a narrow line at 6.4 keV.
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