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Table 2.
Key 4LAC-DR3 features for our classification analysis
| Feature | Unit | Description | Coverage |
|---|---|---|---|
| nu_syn | Hz | Synchrotron-peak frequency (observer frame) | 74% |
| nuFnu_syn | erg cm−2 s−1 | SED at synchrotron peak frequency | 74% |
| HE_EPeak | MeV | Energy of high-energy SED peak (observer frame) | 86% |
| HE_nuFnuPeak | erg cm−2 s−1 | SED at the high-energy-peak frequency | 86% |
| Highest_energy | GeV | Energy of the highest-energy ULTRACLEANVETO photon with association probability P > 0.95 | 100% |
| Energy_Flux100 | erg cm−2 s−1 | Energy flux in the 100 MeV–100 GeV range from spectral fitting | 100% |
| Flux1000 | cm−2 s−1 | Photon flux from 1 to 100 GeV | 100% |
| Pivot_Energy | MeV | Pivot energy of spectral fit | 100% |
| PL_Index | – | Photon index when fitting with PowerLaw | 100% |
| LP_Index | – | Photon index at Pivot_Energy when fitting with LogParabola | 100% |
| Frac_Variability | – | Fractional variability (excess variance) | 74% |
| Variability_Index | – | Variability index from Fermi-LAT light curves | 100% |
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