Table 2
Properties of the four X-ray colour categories, V, A, M, and U.
| Category | N |
|
log  |
log  |
Γ10−20 |
|
|
|||||
| (1) | (2) | (3) | (4) | (5) | (6) |
| V | 7 | 2.68 | 43.59 | 44.04 | 0.3 ± 0.2 |
| A | 6 | 2.78 | 43.86 | 43.93 | 1.5 ± 0.3 |
| M | 19 | 2.56 | 43.96 | 43.93 | 1.3 ± 0.2 |
| U | 14 | 2.19 | 44.20 | 43.99 | 1.6 ± 0.1 |
Notes. (1) The X-ray colour category (see Fig. 3); (2) number of objects belonging to the category; (3) median redshift; (4) median rest-frame 2−10 keV luminosity; (5) median rest-frame 10−20 keV luminosity; (6) photon index in the 10−20 keV band of the stacked spectrum (see Fig. 3). Photon index Γ is related to the energy index α, where flux density, FE ∝ E−α, by Γ = α + 1.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.