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Title:
X-Ray Emission from the Radio Pulsar PSR J1105-6107
Authors:
Gotthelf, Eric V.; Kaspi, Victoria M.
Publication:
Astrophysical Journal Letters v.497, p.L29 (ApJL Homepage)
Publication Date:
04/1998
Origin:
APJ
ApJ Keywords:
STARS: NEUTRON, ISM: SUPERNOVA REMNANTS, X-RAYS: STARS, STARS: PULSARS: INDIVIDUAL ALPHANUMERIC: PSR J1105-, 107
DOI:
10.1086/311266
Bibliographic Code:
1998ApJ...497L..29G

Abstract

We have detected significant X-ray emission from the direction of the young radio pulsar PSR J1105-6107 using the ASCA observatory. The 11 sigma detection includes 459 background-subtracted source counts derived using data from all four ASCA detectors. 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 alpha =1.8+/-0.4 , for a neutral hydrogen column density N_{{H}}=7x1021 cm-2. The unabsorbed 2-10 keV flux assuming the power-law model is ( 6.4+/-0.8)x10^{-13} ergs cm-2 s-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 7 kpc to the source. Within the limited statistics, the source is consistent with being unresolved. We argue that the X-rays are best explained as originating from a pulsar-powered synchrotron nebula.
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