Table 4.
Times of optical eclipses of 3XMM J183333.1+225136.
| Cycle | BJD(TDB) | ΔT | (O − C)/ΔT |
|---|---|---|---|
| 0 | 2 456 860.4645 | 0.0004 | 0.2 |
| 24 | 2 456 862.6076 | 0.0004 | −0.4 |
| 25 | 2 456 862.6972 | 0.0006 | 0.2 |
| 3684: | 2 457 189.4724 | 0.0008 | 0.5 |
| 3685: | 2 457 189.5609 | 0.0008 | −0.5 |
Notes. The colon after the given cycle number indicates a possible one cycle alias. Columns are 1) the number of orbital periods after cycle 0, 2) the barycentric Julian date time given for the centre of the eclipse, 3) the error in measuring the centre of the eclipse and 4) the observed period length for that cycle (O) minus the calculated value based on the ephemeris given in Eq. (1) (C) and normalised by the timing measurement error.
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