Table 4.
Gamma-ray classification of targets observed during our spectroscopic campaign as reported in each Fermi-LAT catalog.
| Fermi-LAT class | 1FGL | 2FGL | 3FGL | 4FGL | FL8Y |
|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) |
| BZB/BLL | 32 | 55 | 80 | 212 | 1 |
| BZQ/FSRQ | 5 | 10 | 10 | 36 | 0 |
| AGN/AGU/BCU | 10 | 76 | 139 | 86 | 10 |
| UGS /UNK | 58 | 52 | 57 | 13 | 15 |
| Total | 105 | 193 | 286 | 350 ( * ) | 26 |
Notes. Column 1 lists the Fermi-LAT class, in particular BZB and BZQ were mainly used in the 1FGL and 2FGL together with the AGU classification, then they were removed in the later 3FGL and 4FGL catalogs. The UNK class of sources with unknown nature were all counted together with UGSs in our summary; Cols. 2, 3, 4, 5, 6 list the number of sources classified according to Col. 1 for each Fermi-LAT catalog. (*) The total number of 4FGL sources is 350 instead of 347 since we observed three targets lying within the positional uncertain regions of three sources associated with one pulsar and two radio galaxies. Results of our campaign confirmed the 4FGL classification; in particular, for the pulsar we only found a quasar within its γ-ray positional uncertainty ellipse.
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