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Table 1
Orbital parameters of the ten eclipsing HMXB systems in ascending order of the orbital period.
| Source | Type | Orbital epochk | P orb | P s | Ṗ orb / P orb | ax sin i | e | ω |
| (MJD) | (days) | (s) | 10-6 yr-1 | (lt-s) | (deg) | |||
|
|
||||||||
| LMC X-4a | O8III | 51 110.86579(10) | 1.40839776(26) | 13.5 | −0.98(7) | 26.343(16) | 0.006(2) | – |
| Cen X-3b | O(6-7)II-III | 50 506.788423(7) | 2.087113936(7) | 4.8 | −1.799(2) | 39.6612(9) | <0.0016 | – |
| 4U 1700-377c | O6.5Iaf+ | 48 900.373(15) | 3.411581(27) | – | −3.3(6) | 48–82 | –j | 49(11) |
| 4U 1538-522d | B0.2Ia | 52 851.33(1) | 3.728382(11) | 526.8 | – | 53.1(1.5) | 0.18(1) | 40(12) |
| SMC X-1e | B0sg | 50 324.691861(8) | 3.89220909(4) | 0.71 | −3.402(7) | 53.4876(9) | 0.00089(6) | 166(12) |
| SAX J1802.7-2017f | B1Ib | 52 168.26(4) | 4.5696(9) | 139.6 | – | 68(1) | – | – |
| XTE J1855-026g | B0Iaep | 51 495.25(2) | 6.0724(9) | 360.7 | – | 80.5(1.4) | 0.04(2) | 226(15) |
| Vela X-1b | B0.5Iae | 48 895.2186(12) | 8.964368(40) | 283.2 | – | 113.89(13) | 0.0898(12) | 152.59(92) |
| EXO 1722-363h | B0-B1Ia | 53 761.68(4) | 9.7403(4) | 413.9 | – | 101(1) | <0.19 | – |
| OAO 1657-415i | B0-6sg | 50 689.116(50) | 10.44749(55) | 37.3 | −3.40(15) | 106.10(2) | 0.1033(6) | 87.6(1.3) |
Notes.Where relevant, we indicate in parentheses the uncertainties on the last digits of each reported value.
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