Table 7.
Gamma-ray classification of sources analyzed in the literature as reported in each Fermi-LAT catalog.
| Fermi-LAT class | 1FGL | 2FGL | 3FGL | 4FGL |
|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) |
| BZB/BLL | 9 | 11 | 14 | 53 |
| BZQ/FSRQ | 1 | ... | ... | 5 |
| AGN/AGU/BCU | 6 | 23 | 58 | 53 |
| UGS/UNK | 22 | 25 | 51 | 7 |
| Total | 38 | 60 ( * ) | 123 | 118 |
Notes. Column 1 lists the Fermi-LAT class; in particular, BZBs and BZQs were mainly used in the 1FGL and 2FGL together with the AGU classification, then they were removed in the later 3FGL and 4FGL catalogs where the UNK class was introduced for sources of unknown nature that were all counted together with UGSs in our summary; Cols. 2, 3, 4, 5 lists the number of sources classified according to Col. 1 for each Fermi-LAT catalog. (*) In the 2FGL, the total number of sources is 60 instead of 59 because we found in the literature that one 2FGL source classified as a pulsar was later classified as a BCU in both the 3FGL and 4FGL.
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