X-ray emission from the 63ms radio pulsar PSR J1105-6107

Physics – Nuclear Physics

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Scientific paper

We have detected significant X-ray emission from the direction of the young radio pulsar PSR J1105-6107 using the ASCA Observatory. The emission shows no evidence of pulsations; the pulsed fraction is less than 31%, at the 90% confidence level. The X-ray emission can be characterized by a power-law spectrum with photon index α=1.8+/-0.4, for a neutral hydrogen column density NH=7x102lcm-2. The unabsorbed 2-10keV flux assuming the power-law model is (6.4+/-0.8)x10-13ergscm-2s-1. The implied efficiency for conversion of spin-down luminosity to ASCA-band emission is (1.6+/-0.2)x10-3, assuming a distance of 7kpc to the source. We argue that the X-rays are best explained as originating from a pulsar-powered synchrotron nebula.

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