Table 4.
Binary parameters measured for PSR J0955−6150 obtained using TEMPO2.
| Binary model | DDGR | DDH | DDGR χ2 grid |
|---|---|---|---|
| Number of ToAs | 1186 | 1186 | 1186 |
| weighted rms of ToA residuals (μs) | 2.02 | 2.02 | 2.02 |
| χ2 of fit | 1197.82 | 1199.91 | 1196.11 |
| χ2/number of degrees of freedom | 1.009 | 1.011 | 1.009 |
| Keplerian orbital parameters | |||
| Orbital period, Pb (days) | 24.57839502(6) | 24.57839502(6) | – |
| Projected semi-major axis of the pulsar orbit, x (lt-s) | 13.282477(2) | 13.2824767(6) | – |
| Epoch of periastron, T0 (MJD) | 56287.604348(6) | 56287.604349(6) | – |
| Orbital eccentricity, e | 0.11750575(1) | 0.11750575(1) | – |
| Longitude of periastron at T0, ω (°) | 202.92940(9) | 202.92941(9) | – |
| Post-Keplerian orbital parameters | |||
Rate of advance of periastron,  (° yr−1) |
[0.0014809] | 0.00152(1) | – |
| Einstein delay, γ (ms) | [0.5362] | [0.5417] | – |
| (Excess) Orbital period derivative, Ṗb (10−12 s s−1) | 11(7) | 11(7) | – |
| Orthometric amplitude of Shapiro delay, h3 (μs) | – | 0.89(7) | – |
| Orthometric ratio of Shapiro delay, ς | – | 0.88(2) | – |
| Mass and inclination measurements | |||
| Mass function, f (M⊙) | 0.004164980(1) | 0.0041649796(5) | – |
| Total mass, M (M⊙) | 1.96(2) | [1.9602] | 1.96(3) |
| Pulsar mass, Mp (M⊙) | 1.71(3) | – | 1.71(2) |
| Companion mass, Mc (M⊙) | 0.254(2) | – | 0.254(2) |
| Orbital inclination, i (deg) | – | – | 83.2(4) |
Notes. Square brackets indicate derived quantities. For the DDGR solution the Ṗb is fitted as a term in addition to the (very small) orbital decay caused by the emission of gravitational waves. For the grid solution, the values for χ2 correspond to those of the best point in the grid; they are slightly lower than the DDGR solution because for each point in the grid there are two parameters (M and Mc) that are assumed, not fitted.
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