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Table 3.
Cen X-3 orbital parameters derived from the NS’s spin pulse Doppler shifts observed in XMM-Newton and Chandra data.
| Parameter | XMM-Newton | Chandra |
|---|---|---|
| Semimajor (R⋆) | 1.6 ± 0.1 | 1.6 ± 0.1 |
| Inclination (deg) | 73.0 ± 2.6 | 74 ± 3 |
| R⋆ (R⊙) | 12.0 ± 0.2 | 12.0 ± 0.2 |
| Mopt (M⊙) | 21.0 ± 0.8 | 22 ± 1 |
| MNS (M⊙) | 1.34 ± 0.10 | 1.35 ± 0.10 |
| NS spin period (s) | 4.80500 ± 0.00013 | 4.7940 ± 0.0004 |
Notes. The fits yielded r2 values of approximately 0.9 for both datasets.
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