Table 2.
Timing parameters for the pulsars Ter5ao, Ter5ap, Ter5au, and Ter5ax as obtained from fitting the observed TOAs with TEMPO.
| Pulsar | J1748−2446ao | J1748−2446ap | J1748−2446au | J1748−2446ax |
|---|---|---|---|---|
| Right ascension, α (J2000) | 17:48:05.14642(7) | 17:48:05.1291(2) | 17:48:04.90740(9) | 17:48:04.46628(6) |
| Declination, δ (J2000) | −24:46:36.14(3) | −24:46:29.8(1) | −24:46:47.75(4) | −24:46:52.79(2) |
| Proper motion in α, μα (mas yr−1) | −1.6(2) | −2.8(5) | −2.2(3) | −2.7(2) |
| Proper motion in δ, μδ (mas yr−1) | −5.243 | −5.243 | −5.243 | −18(6) |
| Spin frequency, f (Hz) | 439.68050153408(3) | 267.04459254652(3) | 219.86646769721(1) | 514.53606048707(2) |
| 1st spin frequency derivative, ḟ (Hz s−1) | −1.68147(2) × 10−14 | −2.189307(9) × 10−14 | 5.1627(1) × 10−15 | 2.52821(2) × 10−15 |
2nd spin frequency derivative,  (Hz s−2) |
2.1(7) × 10−26 | 1.57(2) × 10−25 | 1.93(9) × 10−25 | −7.81(3) × 10−25 |
3rd spin frequency derivative,  (Hz s−3) |
7(3) × 10−35 | – | -8(2) × 10−35 | 10(3) × 10−35 |
4th spin frequency derivative,  (Hz s−4) |
4(1) × 10−42 | – | – | 3.4(8) × 10−42 |
| Reference epoch (MJD) | 56 943.753547 | 56 674.129312 | 56 668.690131 | 56 668.717373 |
| Start of timing data (MJD) | 53 193.239 | 53 204.063 | 53 193.201 | 53 193.239 |
| End of timing data (MJD) | 60 144.204 | 60 144.196 | 60 144.179 | 60 144.196 |
| Dispersion measure, DM (pc cm−3) | 238.205(4) | 239.74(6) | 238.08(1) | 235.449(2) |
| Solar system ephemeris | DE440 | DE440 | DE440 | DE440 |
| Terrestrial time standard | TT(BIPM) | TT(BIPM) | TT(BIPM) | TT(BIPM) |
| Time units | TDB | TDB | TDB | TDB |
| Number of TOAs | 341 | 298 | 279 | 222 |
| Residuals RMS (μs) | 20.09 | 70.33 | 22.46 | 16.70 |
| S1284 (mJy) | 0.012 | 0.015 | 0.012 | 0.008 |
| L1284 (mJy kpc2) | 0.524 | 0.647 | 0.548 | 0.376 |
| Angular offset from nominal cluster centre (arcmin) | 0.156 | 0.253 | 0.053 | 0.161 |
| Binary parameters | ||||
| Binary model | DDFWHE | DDFWHE | DDFWHE | DD |
| Projected semi-major axis, xp (lt-s) | 62.313928(6) | 13.20131(3) | 6.545721(6) | 14.329676(1) |
| Orbital eccentricity, e | 0.32488898(8) | 0.905186(4) | 0.025695(1) | 9.1542(1) × 10−3 |
| Longitude of periastron, ω (deg) | 245.29053(1) | 285.14(4) | 265.935(1) | 187.072(1) |
| Epoch of passage at periastron, T0 (MJD) | 57 384.379457(2) | 56 674.842648(3) | 56 668.18017(9) | 56 654.2979(1) |
| Orbital period, Pb (days) | 57.55567566(2) | 21.38817354(3) | 5.9794622(1) | 30.208838(1) |
Rate of periastron advance,  (deg yr−1) |
5.60(3) × 10−4 | 1.058(2) × 10−2 | 0.0151(3) | 2.4(3) × 10−3 |
| Orbital period derivative, Ṗb (10−12 s s−1) | 165(9) | 130(21) | −16(1) | -13(9) |
| Einstein delay, γ (s) | 0.00728 | –0.0048 | – | – |
| Rate of change of projected semi-major axis ẋ | 4(2) × 10−14 | – | – | – |
| Orthometric amplitude of Shapiro delay, h3 (μs) | 2(1) × 10−6 | – | – | – |
| Relativistic deformation of the orbit, δθ (10−6) | 0.231144 | 0.346681 | – | – |
| Relativistic deformation of the orbit, δr (10−6) | 0.2130047 | 0.3091813 | – | – |
| Total mass, Mtot (M⊙) | 3.17(4) | 1.997(6) | 1.8(1) | 7(1) |
| Derived parameters | ||||
| Spin period, P (s) | 2.2743787739299(1) × 10−3 | 3.7446929385989(5) × 10−3 | 4.5482151529223(2) × 10−3 | 1.9434983772464(3) × 10−3 |
| 1st spin period derivative, Ṗ (s s−1) | 8.6979(1) × 10−20 | 3.07000(1) × 10−19 | −1.06797(2) × 10−19 | −9.5495(7) × 10−21 |
| Mass function, f(Mp) (M⊙) | 7.8414183(8) × 10−2 | 5.403(3) × 10−3 | 8.422300(7) × 10−3 | 3.461973(1) × 10−3 |
| Minimum companion mass, Mc, min (M⊙) | 0.688 | 0.238 | 0.282 | 0.203 |
| Median companion mass, Mc, med (M⊙) | 0.831 | 0.281 | 0.332 | 0.237 |
| Surface magnetic field, B0, (108 G) | 1.6231 | 4.0532 | 4.1628 | – |
| Intrinsic spin-down, Ṗint (10−20 s s−1) | 1.1312 | 4.284 | 3.7209 | – |
| Characteristic age, τc (Gyr) | 3.1854 | 1.384 | 1.936 | – |
Notes. These pulsars are in eccentric orbits. The companion mass is calculated assuming a pulsar mass of 1.35 M⊙. Numbers in parentheses represent 1-σ uncertainties in the last digit. The proper motion in declination value was fixed to μδ = –5.243 mas yr−1 based on Baumgardt & Vasiliev (2021) in cases where it was not measured via timing.
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.