Table 4.
Results from the investigation of possible dependencies of the SF on redshift (top section) and obscuration (bottom section) for the main sample as well as the other five subsamples of AGN selected via different properties and analyzed in this study (listed in the top row).
| Main sample | X-ray | MIR | Opt. var. | Spec. Type I | Spec. Type II | |
|---|---|---|---|---|---|---|
| Redshift dependence | ||||||
| z range | 0.121 to 3.715 | 0.121 to 3.715 | 0.350 to 3.715 | 0.346 to 3.715 | 0.346 to 3.715 | 0.121 to 1.447 |
| 1st quartile | 0.530 | 0.620 | 0.704 | 0.961 | 1.171 | 0.520 |
| Median (z̃) | 0.876 | 0.893 | 1.214 | 1.441 | 1.653 | 0.696 |
| 3rd quartile | 1.402 | 1.450 | 2.021 | 2.032 | 2.152 | 0.890 |
 slope |
0.02 ± 0.03 | 0.03 ± 0.02 | 0.20 ± 0.03 | 0.34 ± 0.01 | 0.38 ± 0.01 | 0.01 ± 0.04 |
 slope |
0.34 ± 0.03 | 0.35 ± 0.02 | 0.33 ± 0.02 | 0.37 ± 0.01 | 0.37 ± 0.02 | 0.10 ± 0.03 |
| Absorption dependence | ||||||
| NH range (×1022 cm−2) | 0.0 to 25.9 | 0.0 to 25.9 | 0.0 to 25.9 | 0.0 to 25.9 | 0.0 to 25.9 | 0.0 to 13.0 |
| NH < 1022 cm−2 slope | 0.38 ± 0.02 | 0.38 ± 0.02 | 0.34 ± 0.01 | 0.39 ± 0.01 | 0.40 ± 0.01 | 0.10 ± 0.03 |
| NH > 1022 cm−2 slope | 0.15 ± 0.02 | 0.15 ± 0.02 | 0.25 ± 0.01 | 0.29 ± 0.01 | 0.28 ± 0.01 | 0.04 ± 0.07 |
Notes. Absorption is quantified by the hydrogen column density NH. For each quantity we report the corresponding range boundaries. In the redshift-related section of the table (top) we report the 1st quartile, median, and 3rd quartile values of redshift. Each sample is divided in two subsets on the basis of the median redshift of the sample (top section), or on the basis of the value NH = 1022 cm−2 (bottom section). For each subset we report the estimated slope value for the best-fit line, obtained as usual via a weighted least squares regression, approximating the corresponding set of points in the linear region of the SF, with its error.
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