GPM J1839-10

Parameter Value Confidence Frequency band Reference
Progenitor WD+MD? Horváth et al. (2025, submitted)
Declination (°) 10:31:49.37 ± 0.15″ Hurley-Walker et al. (2023)
Dispersion measure (pc cm⁻³) 273.5 ± 2.5 pc cm⁻³ Hurley-Walker et al. (2023)
Distance (kpc) 5.7 ± 2.9 kpc Hurley-Walker et al. (2023)
Flux density (mJy) 148 ± 3 mJy 1.0 GHz Hurley-Walker et al. (2023)
Fractional linear polarisation (%) 10 - 100 % Hurley-Walker et al. (2023)
Log-parabolic spectrum model, power-law term -3.17 ± 0.06 1.0 GHz Hurley-Walker et al. (2023)
Log-parabolic spectrum model, quadratic term -0.56 ± 0.03 1.0 GHz Hurley-Walker et al. (2023)
Magnitude 22.70 ± 0.53 z_s Pelisoli et al. (2025)
Magnitude > 23.4 i_s Pelisoli et al. (2025)
Magnitude > 24.5 r_s Pelisoli et al. (2025)
Magnitude > 25.5 g_s Pelisoli et al. (2025)
Magnitude > 24.7 u_s Pelisoli et al. (2025)
Nulling fraction (%) 50 - 70 % Hurley-Walker et al. (2023)
Off-pulse radio luminosity (mJy beam⁻¹) < 0.06 mJy beam⁻¹ Hurley-Walker et al. (2023)
OPM oscillation timescale (s) 0.2 - 4.0 s Hurley-Walker et al. (2023)
Orbit: inclination (°) 100.1 ± 0.6 ° Horváth et al. (2025, submitted)
Orbit: period (d) 0.3643795 ± 0.0000023 d Horváth et al. (2025, submitted)
PEPOCH (d) 54448.493168570100 d Hurley-Walker et al. (2023)
Period (s) 1318.1957 ± 0.0002 s Hurley-Walker et al. (2023)
Period (s) 1265.2197 ± 0.0002 s Horváth et al. (2025, submitted)
Period derivative ≲ 3.6 × 10-13 Hurley-Walker et al. (2023)
Profile width (s) 400 s Hurley-Walker et al. (2023)
Pulse width (s) 30 - 300 s Hurley-Walker et al. (2023)
Right ascension (°) 18:39:02.00 ± 0.01 s Hurley-Walker et al. (2023)
Rotation measure (rad m⁻²) ~ -532 rad m⁻² Hurley-Walker et al. (2023)
X-ray luminosity (erg s⁻¹) < 2 × 1033 erg s⁻¹ Hurley-Walker et al. (2023)