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Table 1.

Parameters for PSR J2055+3829 derived from the analysis of the NRT timing data using TEMPO2.

Data reduction parameters
Analysis type Single template 2D template
Span of timing data (MJD) 57333–58421 57333–58421
Number of TOAs 1723 835
Weighted RMS residual (μs) 2.284 2.516
EFAC 1.074 1.726
EQUAD (μs) 0.000 0.000
Reduced χ2 1.000 1.000

Astrometric and spin parameters

Right ascension, α (J2000) 20:55:10.306550(4) 20:55:10.306556(4)
Declination, δ (J2000) +38:29:30.90571(6) +38:29:30.90571(6)
Proper motion in α, μα cos(δ) (mas yr−1) 5.92(3) 5.87(5)
Proper motion in δ, μδ (mas yr−1) 0.79(7) 0.9(1)
Spin frequency, ν (Hz) 478.631427595910(5) 478.63142759590(2)
Spin frequency derivative, (10−16 Hz s−1) −2.290(1) −2.289(2)
Dispersion measure, DM (pc cm−3) 91.8295(2) 91.8295(7)
Dispersion measure derivative, DM1 (pc cm−3 yr−1) −0.0047(2) −0.0049(7)
Reference epoch (MJD) 57900 57900

Binary parameters

Orbital period, Pb (days) 0.12959037294(1) 0.12959037293(2)
Projected semimajor axis of the pulsar orbit, x (lt-s) 0.0452618(2) 0.0452616(3)
Epoch of ascending node, Tasc 57900.06984171(6) 57900.06984175(9)
η ≡ esinω (10−5) 0.9(6) 0.7(10)
κ ≡ ecosω (10−5) 0.5(4) 1.3(6)
Orbital period derivative, b (10−12) −2.00(9) −2.0(1)

Derived parameters

Orbital eccentricity, e (10−5) 1.0(6) 1.4(7)
Mass function, f (10−6M) 5.92832(7) 5.9283(1)
Minimum companion mass, mc, min (M) 0.02290 0.02290
Total proper motion, μT (mas yr−1) 5.97(4) 5.93(6)
Galactic longitude, l (°) 80.615
Galactic latitude, b (°) −4.259
DM-derived distance, d (kpc) 4.6(9)
Transverse velocity, vT (km s−1) 13(3)
Spin period, P (ms) 2.08929030219107(2)
Spin period derivative, (10−22 s s−1) 9.996(5)
Intrinsic spin period derivative, int (10−22 s s−1) 8(2)
Spin-down power, Ė (1033 erg s−1) 3.6(7)
Surface magnetic field intensity, Bs (107 G) 4.2(4)
Magnetic field intensity at light cylinder, BLC (104 G) 4.3(4)

Notes. Numbers in parentheses are the nominal 1σ statistical uncertainties in the last digits quoted. The reference epoch of the pulsar’s spin and astrometric and DM parameters is MJD 57900, and was chosen to be close to the center of the timing dataset. Epochs are given in TCB, and the DE436 planetary ephemeris was used. The DM-derived distance was estimated using the YMW16 model of free electron density (Yao et al. 2017). We assumed a pulsar mass of 1.4 M for the calculation of minimal companion masses and a moment of inertia I of 1045 g cm2 for the calculation of Ė, Bs, and BLC.

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