Now that detection of gravitational-wave signals from the coalescence of extra-galactic
compact binary star mergers has become nearly routine, it is intriguing to consider other …

We present results of an all-sky search for continuous gravitational waves (CWs), which can
be produced by fast spinning neutron stars with an asymmetry around their rotation axis …

The Advanced LIGO [1] and Advanced Virgo [2] detectors have made numerous detections
of gravitational waves (GWs), to date consisting of short-duration (transient) GWs emitted …

Nearly a century after Einstein first predicted the existence of gravitational waves, a global
network of Earth-based gravitational wave observatories,,, is seeking to directly detect this …

Seven years after the first direct detection of gravitational waves, from the collision of two
black holes, the field of gravitational wave astronomy is firmly established. A first detection of …

There have been several previous searches for persistent (or continuous) quasi-
monochromatic gravitational waves emitted by a selection of known pulsars using data from …

Non-axisymmetrical deformations of the crust on rapidly rotating neutron stars are one of the
main targets of searches for continuous gravitational waves. The maximum ellipticity, or …

Significant progress has been made in recent years on the development of gravitational-
wave detectors. Sources such as coalescing compact binary systems, neutron stars in low …

Low frequency radio waves, while challenging to observe, are a rich source of information
about pulsars. The LOw Frequency ARray (LOFAR) is a new radio interferometer operating …

Gravitational waves astronomy allows us to study objects and events invisible in
electromagnetic waves. It is crucial to validate the theories and models of the most …