X-ray Observations of the New Pulsar--Supernova Remnant System PSR J1119-6127 and SNR G292.2-0.5

摘要

PSR J1119-6127 is a recently discovered 1700-year-old radio pulsar that has avery high inferred surface dipolar magnetic field. We present a detailedanalysis of a pointed ASCA observation and archival ROSAT data of J1119-6127and its surroundings. Both data sets reveal extended emission coincident withthe newly-discovered radio supernova remnant G292.2-0.5, reported in acompanion paper by Crawford et al. (astro-ph/0012287).. A hard point source,offset ~1.5' from the position of the radio pulsar, is seen with the ASCA GIS.No pulsations are detected at the radio period with a pulsed fraction upperlimit of 61% (95% confidence). The limited statistics prevent a detailedspectral analysis, although a power-law model with photon index (Gamma=~1-2)describes the data well. Both the spectral model and derived X-ray luminosityare consistent with those measured for other young radio pulsars, although thespatial offset renders an identification of the source as the X-ray counterpartof the pulsar uncertain.