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Table 3
Stellar and X-ray cycle properties (0.2−2.0 keV) of the analyzed stars; brackets denote literature values, log LX in [erg s-1].
| Par. | α Cen A | α Cen B | 61 Cyg A | 61 Cyg B |
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| sp. type | G2V | K1V | K5V | K7V |
| Prot (d) | 29 | 37 | 35 | 38 |
| Pact (yr) | ~15? | 8.8 | 7.3 | 11.7 |
| log LXmax | 26.8 (27.1) | 27.4 | 27.3 | 27.1 |
| log LXmin | ≲ 26 | 26.6 | 26.8 | 26.7 (26.6) |
| log LX/Lbol | −7.0 | −6.2 | −5.6 | −5.5 |
| X-ray cycle | Y? | Y | Y | Y? |
| Ampl. | ≳ 10 | 6 | 3 | 2−3? |
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