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Paper: Variability in the Quiescent State of Neutron Star Transients
Volume: 328, Binary Radio Pulsars
Page: 291
Authors: Campana, S.
Abstract: Variability studies represent a powerful tool to assess the emission mechanisms at work in the quiescent state of transient low-mass X-ray binaries. Here we report on Chandra and XMM-Newton observations of two well-known transient sources: Aql X-1 and Cen X-4. Long- and short-term variability is observed. This variability can be easily interpreted as coming from an active millisecond radio pulsar emitting X-rays at the shock between a radio pulsar wind and inflowing matter from the companion star.
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