2009ApJ...691..458P

PSR J0108-1431 is a nearby, 170 Myr old, very faint radio pulsar near the "pulsar death line" in the P- diagram. We observed the pulsar field with the Chandra X-ray Observatory and detected a point source (53 counts in a 30 ks exposure; energy flux (9±2)x10^–15 erg/cm2/s in the 0.3-8 keV band) close to the radio pulsar position. Based on the large X-ray/optical flux ratio at the X-ray source position, we conclude that the source is the X-ray counterpart of PSR J0108-1431. The pulsar spectrum can be described by a power-law model with photon index Γ ~ 2.2 and luminosity L_0.3-8 keV_~ 2x10²⁸ d ²₁₃₀ erg/s, or by a blackbody model with temperature kT ~ 0.28 keV and bolometric luminosity L_bol ~ 1.3x10²⁸ d ²₁₃₀ erg/s, for a plausible hydrogen column density N_H= 7.3x10¹⁹/cm2 (d₁₃₀= d/130 pc). The pulsar converts ∼0.4% of its spin-down power into X-ray luminosity, i.e., its X-ray efficiency is higher than for most younger pulsars. From the comparison of the X-ray position with the previously measured radio positions, we estimated the pulsar proper motion of 0.2 arcsec/yr (V_{bottom}~ 130d₁₃₀ km/s), in the south-southeast direction.