Free Access
Table 2
Source structure and spectral index.
| Structure | Ultra steep | Steep | Steep-flat | Flat-steep | Flat | GPS | Inverted | Not available |
| α> 0.7 | α = 0.7−0.5 | |||||||
|
|
||||||||
| Point | 6 (1) | 4 (1) | 9 (1) | 1 | 13 (2) | 2 | 5 | 1 |
| Core-jet | 9 | 3 | 7 (1+1NLRG) | 3 (1) | 18 (3+1NLRG) | 5 (1) | 1 | − |
Notes. In brackets the number of BL Lac objects; the spectral index information for J0513.8+0156 is missing in Mantovani et al. (2011).
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.