All-sky upper limit for gravitational radiation from spinning neutron stars

TL;DR

This paper reports an all-sky search for continuous gravitational waves from spinning neutron stars using the EXPLORER resonant bar detector, setting an upper limit on signal amplitude in a specific frequency band.

Contribution

It introduces a maximum likelihood detection method applied to all-sky data for gravitational waves from neutron stars, establishing new upper limits.

Findings

Upper limit of 2×10^{-23} for gravitational wave amplitude

Focused on frequency band 921.00 Hz to 921.76 Hz

Applied maximum likelihood detection method

Abstract

We present results of the all-sky search for gravitational-wave signals from spinning neutron stars in the data of the EXPLORER resonant bar detector. Our data analysis technique was based on the maximum likelihood detection method. We briefly describe the theoretical methods that we used in our search. The main result of our analysis is an upper limit of ${\bf 2\times10^{-23}}$ for the dimensionless amplitude of the continuous gravitational-wave signals coming from any direction in the sky and in the narrow frequency band from 921.00 Hz to 921.76 Hz.