Table 4
Characteristics of low-luminosity X-ray sources (AWDs, XRBs, and contact binaries).
| Source | Spectral emission | Luminosity |
|---|---|---|
| class | (keV) | (ergs−1) |
| Symbiotic: α-type | <0.5 | Lbol > 1036 |
| Symbiotic: β-type | <2.4 | Lx ~ 1030–32 |
| Symbiotic: γ-type | >2.4 | Lx - 1031–34 |
| Symbiotic: δ-type | >2.4 | Lx > 1034 |
| CV: Non-magnetic | 2.-5. | Lx ~ 1029–32 |
| CV: Polars | <5.0 | Lbol ~ 1030–31 |
| CV: Intermediate polars | 5.–50. | Lx < 1034 |
| Quiescent LMXBs | <5. | Lx ~ 1031–33 |
| Millisecond pulsars | 0.2–2.5 | Lx ~ 1030–31 |
| Active binaries | <2.5 | Lx ~ 1029–32 |
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