Method for all-sky searches of continuous gravitational wave signals using the frequency-Hough transform - INSPIRE

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Method for all-sky searches of continuous gravitational wave signals using the frequency-Hough transform

Pia Astone
(
- INFN, Rome
)
,
Alberto Colla
(
- Rome U. and
- INFN, Rome
)
,
Sabrina D'Antonio
(
- INFN, Rome2
)
,
Sergio Frasca
(
- Rome U. and
- INFN, Rome
)
,
Cristiano Palomba
(
- INFN, Rome
)

Jul 31, 2014

24 pages

Published in:

Phys.Rev.D 90 (2014) 4, 042002

Published: Aug 8, 2014

e-Print:

1407.8333 [astro-ph.IM]

DOI:

10.1103/PhysRevD.90.042002

View in:

ADS Abstract Service

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Abstract: (APS)

In this paper we present a hierarchical data analysis pipeline for all-sky searches of continuous gravitational wave signals, like those emitted by spinning neutron stars asymmetric with respect to the rotation axis, with unknown position, rotational frequency, and spin-down. The core of the pipeline is an incoherent step based on a particularly efficient implementation of the Hough transform, which we call frequency-Hough, that maps the data time-frequency plane to the source frequency and spin-down plane for each fixed direction in the sky. Theoretical ROCs and sensitivity curves are computed and the dependency on various thresholds is discussed. A comparison of the sensitivity loss with respect to an “optimal” method is also presented. Several other novelties, with respect to other wide-parameter analysis pipelines, are also outlined. They concern, in particular, the construction of the grid in the parameter space, with over-resolution in frequency and parameter refinement, candidate selection, and various data cleaning steps that are introduced to improve search sensitivity and rejection of false candidates.

Note:

27 pages, 20 figures, PRD in press

04.30.-w
04.80.Nn
97.60.Jd
sensitivity
gravitational radiation
rotation
neutron star: spin
frequency
hierarchy
asymmetry

References(37)

Figures(24)

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