Table 2.
Timing parameters for PSR J0210+5845.
Data set and assumptions | ||
---|---|---|
MJD range | 58118–59704 | |
Data span (yr) | 4.34 | |
Number of TOAs | 110 | |
Clock correction procedure | TT(TAI) | |
Solar system ephemeris model | DE436 | |
Units | TDB | |
Measured quantities | ||
Fitting for astrometry | Gaia DR3 astrometry | |
Epoch of position measurement (MJD) | 58910.0 | 57388.5 |
Right ascension, αJ2000 |
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Declination, δJ2000 |
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Proper motion in RA, μα cos δ (mas yr−1) | … | −1.116 |
Proper motion in Dec, μδ (mas yr−1) | … | −0.495 |
Epoch of frequency determination (MJD) | 58910.0 | 58910.0 |
Spin frequency, f (s−1) | 0.566181225686(6) | 0.566181225686(6) |
First derivative of spin frequency, ḟ (s−2) | −4.86224(6)×10−14 | −4.86223(6)×10−14 |
Second derivative of spin frequency, ![]() |
−1.1628(3)×10−22 | −1.1628(3)×10−22 |
Third derivative of spin frequency, ![]() |
−4.96(4)×10−31 | −4.96(4)×10−31 |
Fourth derivative of spin frequency, ![]() |
−2.47(13)×10−39 | −2.47(12)×10−39 |
Fifth derivative of spin frequency, ![]() |
−1.9(2.0)×10−47 | −1.5(1.9)×10−47 |
Dispersion measure, DM (pc cm−3) | 76.7895(18) | 76.7894(18) |
Weighted rms timing residual (μs) | 860.7 | 864.5 |
Reduced χ2 value | 0.89 | 0.90 |
Notes. Two timing ephemerides are fitted: (1) where the celestial position is fitted together with five spin frequency derivatives and the dispersion measure and (2) where the celestial position and proper motions are fixed to those of Gaia DR3. The Gaia positions are consistent with the positions from radio timing at the same epoch of position measurement. The higher order frequency derivatives and DMs are consistent at the epoch of frequency determination. The figures in parentheses are the nominal 1σ uncertainties in the least significant digits quoted, which have been multiplied by the square root of the reduced χ2.
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