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Table 3.
Timing solution of NGC 6652B.
| Right Ascension, α (J2000) | 18:35:45.4704(1) |
| Declination, δ (J2000) | −32:59:25.48(1) |
| Proper Motion in α, μα (mas yr−1) | −7.7(5) |
| Proper Motion in δ, μδ (mas yr−1) | −4(4) |
| Spin Frequency, f (s−1) | 546.36058616286(10) |
| 1st Spin Frequency derivative, ḟ (Hz s−2) | −1.2962(1) × 10−14 |
| Reference Epoch (MJD) | 58736.720 |
| Start of Timing Data (MJD) | 55750 |
| End of Timing Data (MJD) | 59490 |
| Dispersion Measure, DM (pc cm−3) | 63.5083(6) |
| 1st derivative of DM, DM1 (pc cm−3 yr−1) | 0.0237(6) |
| 2nd derivative of DM, DM2 (pc cm−3 yr−2) | 0.0055(9) |
| 3rd derivative of DM, DM3 (pc cm−3 yr−3) | −0.0126(9) |
| 4th derivative of DM, DM4 (pc cm−3 yr−4) | −0.015(2) |
| 5th derivative of DM, DM5 (pc cm−3 yr−5) | −0.0050(6) |
| Solar System Ephemeris | DE436 |
| Terrestrial Time Standard | TT(BIPM) |
| Time Units | TDB |
| Number of ToAs | 526 |
| Residuals RMS (μs) | 22.40 |
| Binary Parameters | |
| Binary Model | ELL1 |
| Projected Semi-major Axis, x (lt-s) | 1.430841(2) |
| First Laplace-Lagrange parameter, η | −2.7(4) × 10−5 |
| First Laplace-Lagrange parameter, κ | −2.2(3) × 10−5 |
| Epoch of passage at Ascending Node, Tasc (MJD) | 58866.2655109(6) |
| Orbital Period, Pb (days) | 1.197863230(1) |
| Orbital Period derivative, Ṗb (10−12 s s−1) | 0.86(1.08) |
| Derived Parameters | |
| Spin Period, P (s) | 0.0018302930799293(3) |
| Maximum Spin Period derivative, Ṗ (s s−1) | 6.65 × 10−20 |
| Mass function, f(Mp) (M⊙) | 0.0021920077(95) |
| Minimum companion mass, Mc, min (M⊙) | 0.18 |
| Median companion mass, Mc, med (M⊙) | 0.21 |
| Eccentricity, e | 3.49(35) × 10−5 |
| Longitude of periastron, ω (°) | 230(5) |
| Time of periastron, T0 (MJD) | 58867.03(1) |
| Offset from GC center in α, θα | 0.033 |
| Offset from GC center in δ, θδ | 0.019 |
| Total offset from GC center, θ⊥ (arcmin) | 0.038 |
| Proj. distance from GC center, r⊥ (pc) | 0.111 |
| Proj. distance from GC center, r⊥ (core radii) | 0.383 |
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