Open Access
Table 4.
Timing parameters for the pulsars Ter5as, Ter5av and Ter5aw as obtained from fitting the observed ToAs with TEMPO.
| Pulsar | J1748−2446as | J1748−2446av | J1748−2446aw |
|---|---|---|---|
| Right ascension, α (J2000) | 17:48:04.65947(5) | 17:48:05.0263(1) | 17:48:05.41293(6) |
| Declination, δ (J2000) | −24:46:40.22(2) | −24:46:43.38(4) | −24:46:50.04(2) |
| Proper motion in α, μα (mas yr−1) | −2(1) | −1.7(2) | −2.2(1) |
| Proper motion in δ, μδ (mas yr−1) | −12(6) | – | – |
| Spin frequency, f (Hz) | 429.838515818049(9) | 540.70167993111(2) | 76.633768847072(2) |
| 1st spin frequency derivative, ḟ (Hz s−1) | −4.72957(1) × 10−14 | 1.242661(6) × 10−14 | −7.67252(2) × 10−14 |
2nd spin frequency derivative,  (Hz s−2) |
5.864(7) × 10−25 | −6.44(1) × 10−25 | 1.44(1) × 10−26 |
3rd spin frequency derivative,  (Hz s−3) |
7(3) × 10−35 | – | -8(3) × 10−36 |
| Reference epoch (MJD) | 56 674.125850 | 56 674.105395 | 56 500.000000 |
| Start of timing data (MJD) | 53 204.124 | 53 204.032 | 53 193.239 |
| End of timing data (MJD) | 60 144.128 | 60 144.179 | 60 144.223 |
| Dispersion measure, DM (pc cm−3) | 238.211(1) | 238.909(2) | 239.310(2) |
| Solar system ephemeris | DE440 | DE440 | DE440 |
| Terrestrial time standard | TT(BIPM) | TT(BIPM) | TT(BIPM) |
| Time units | TDB | TDB | TDB |
| Number of TOAs | 172 | 282 | 706 |
| Residuals RMS (μs) | 17.26 | 37.77 | 27.67 |
| S1284 (mJy) | 0.010 | 0.015 | 0.010 |
| L1284 (mJy kpc2) | 0.429 | 0.679 | 0.428 |
| Angular offset from nominal cluster centre (arcmin) | 0.084 | 0.045 | 0.156 |
| Binary parameters | |||
| Binary Model | – | ELL1H | ELL1H |
| Projected semi-major Axis, xp (lt-s) | – | 1.250826(2) | 3.725771(1) |
| 1st Laplace-Lagrange parameter, ϵ = e sin ω | – | -0.000099(3) | -0.000014(1) |
| 2nd Laplace-Lagrange parameter, ϵ = e cos ω | – | -0.000235(4) | -0.000084(1) |
| Longitude of periastron, ω (deg) | – | 203.1(8) | 186.9(9) |
| Epoch of ascending node, Tasc (MJD) | – | 55 652.871653(1) | 59 351.17308627 |
| Orbital period, Pb (days) | – | 3.381657341(3) | 0.73135857362(5) |
Rate of periastron advance,  (deg yr−1) |
– | – | 0.5(1) |
| Orbital period derivative, Ṗb (10−12 s s−1) | – | −10(2) | 5.92(2) |
| Einstein delay, γ (s) | – | – | 0.00000438 |
| Orthometric amplitude of Shapiro delay, h3 (μs) | – | – | 2.1(8) × 10−6 |
| Relativistic deformation of the orbit, δθ (10−6) | – | – | 3.143218 |
| Relativistic deformation of the orbit, δr (10−6) | – | – | 2.939424 |
| Total Mass, Mtot (M⊙) | – | – | 2.1(6) |
| Derived parameters | |||
| Spin period, P (s) | 2.32645508301377(5) × 10−3 | 1.84944866479313(6) × 10−3 | 1.30490776461166(4) × 10−2 |
| 1st spin period derivative, Ṗ (s s−1) | 2.559829(6) × 10−19 | −4.25047(2) × 10−20 | 1.306465(3) × 10−18 |
| Mass function, f(Mp) (M⊙) | – | 1.83744(1) × 10−4 | 0.1038166(4) |
| Minimum companion mass, Mc, min (M⊙) | – | 0.071 | 0.777 |
| Median companion mass, Mc, med (M⊙) | – | 0.083 | 0.943 |
| Surface magnetic field, B0, (108 G) | – | 2.058 | 10.557 |
| Intrinsic spin-down, Ṗint (10−20 s s−1) | – | 2.237 | 8.3411 |
| Characteristic age, τc (Gyr) | – | 1.309 | 2.478 |
Notes. Same assumptions have been made as stated earlier in Table 2.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.