Table 4
X-ray absorption in the 9−20 keV excess sources.
| PID | N H,24 | A C 2−10 | A C 10−20 |
| (1) | (2) | (3) | (4) |
|
|
|||
| 30 |
|
7 | 1.5 |
| 64 |
|
12 | 1.9 |
| 114† |
|
4 | 1.3 |
| 144 |
|
11 | 1.9 |
| 180 |
|
6 | 1.5 |
| 245 |
|
15 | 2.1 |
| 252† |
|
16 | 2.1 |
Notes. (1) Source identification number; (2) absorption column density in unit of 1024 cm-2; (3) absorption correction factor for the 2−10 keV luminosity; (4) absorption correction factor for the 10−20 keV luminosity. Spectral fits were performed for the observed-frame 1−7 keV data using an absorbed power-law with Γ = 1.8. When a Thomson opacity approaches unity, as observed in these sources, the absorption correction depends on the geometry of absorbing clouds (e.g., Matt et al. 1999b). In this table, the values for a spherical geometry are given as the lower limits. These values can go up by a factor of ~2, as the covering factor of the absorber is reduced.
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