Hierarchical Hough all-sky search for periodic gravitational waves in LIGO S5 data

Date

2010

Authors

Sancho De La Jordana, L
LIGO , Scientific Collaboration (700 Scientists)
VIRGO, Scientific Collaboration (numerous Scientists)
Abbott, B
Allen, B
Amin, R
Matichard, F
Arain, M
Kasprzyk, D
Aufmuth, P

Journal Title

Journal ISSN

Volume Title

Publisher

Institute of Physics Publishing

Abstract

We describe a new pipeline used to analyze the data from the fifth science run (S5) of the LIGO detectors to search for continuous gravitational waves from isolated spinning neutron stars. The method employed is based on the Hough transform, which is a semi-coherent, computationally efficient, and robust pattern recognition technique. The Hough transform is used to find signals in the time-frequency plane of the data whose frequency evolution fits the pattern produced by the Doppler shift imposed on the signal by the Earth's motion and the pulsar's spin-down during the observation period. The main differences with respect to previous Hough all-sky searches are described. These differences include the use of a two-step hierarchical Hough search, analysis of coincidences among the candidates produced in the first and second year of S5, and veto strategies based on a χ2 test.

Description

Keywords

Keywords: All-sky; Computationally efficient; Doppler shifts; Frequency evolution; Gravitational waves; Observation Period; Robust patterns; Spin-down; Spinning neutron stars; Time-frequency planes; Gravitational effects; Gravity waves; Hough transforms; Metadata;

Citation

Source

Journal of Physics: Conference Series

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1088/1742-6596/228/1/012004

Restricted until

2037-12-31