All-sky coherent search for continuous gravitational waves in 6–7 Hz band with a torsion-bar antenna

Upper limit on gravitational wave backgrounds at 0.2 Hz with a torsion-bar antenna.

We present the first upper limit on gravitational wave (GW) backgrounds at an unexplored frequency of 0.2 Hz using a torsion-bar antenna (TOBA). A TOBA was proposed to search for low-frequency GWs. We have developed a small-scaled TOBA and successfully found Ω(gw)(f)<4.3×10(17) at 0.2 Hz as demonstration of the TOBA's capabilities, where Ω(gw)(f) is the GW energy density per logarithmic frequen...

First low-frequency Einstein@Home all-sky search for continuous gravitational waves in Advanced LIGO data

Implementation of an F -statistic all-sky search for continuous gravitational waves in Virgo VSR1 data

We present an implementation of the  -statistic to carry out the first search in data from the Virgo laser interferometric gravitational wave detector for periodic gravitational waves from a priori unknown, isolated rotating neutron stars. We searched a frequency f0 range from 100 Hz to 1 kHz and the frequency dependent spindown f1 range from − × − f 1.6( 100 Hz) 10 0 9 Hz s −1 to zero. A larg...

First low-frequency Einstein@Home all-sky search for continuous gravitational waves in Advanced LIGO data

First low-frequency Einstein@Home all-sky search for continuous gravitational waves in Advanced LIGO data

We report results of a deep all-sky search for periodic gravitational waves from isolated neutron stars in data from the first Advanced LIGO observing run. This search investigates the low frequency range of Advanced LIGO data, between 20 and 100 Hz, much of which was not explored in initial LIGO. The search was made possible by the computing power provided by the volunteers of the Einstein@Hom...