Table 5.
Fractions of Fermi-LAT sources of uncertain nature (i.e., AGUs, BCUs, and UGSs) analyzed during our campaign and computed with respect to the total number in each Fermi-LAT catalog.
| Fermi-LAT class | 1FGL | 2FGL | 3FGL | 4FGL |
|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) |
| AGN/AGU/BCU | 0.08 | 0.27 | 0.24 | 0.06 |
| UGS/UNK | 0.09 | 0.09 | 0.06 | 0.01 |
Notes. Column 1 lists the Fermi-LAT class; in particular, the AGU classification was used only in the 1FGL and 2FGL, then replaced by BCU in the later 3FGL and 4FGL catalogs. The UNK class of sources of unknown nature were all counted together with UGSs in our summary; Cols. 2, 3, 4, 5 report the fraction of sources in each class computed over the whole number of sources belonging to that class listed in each Fermi-LAT catalog.
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.