Spectral Line Removal in the LIGO Data Analysis System (LDAS)

Details Spectral Line Removal in the LIGO Data Analysis System (LDAS) Spectral Line Removal in the LIGO Data Analysis System (LDAS)

2003-08-09

arxiv.org/abs/gr-qc/0308024v1

Class.Quant.Grav. 20 (2003) S721-S730

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, 5 figures, to be published in CQG GWDAW02 proceedings

Scientific paper

10.1088/0264-9381/20/17/315

High power in narrow frequency bands, spectral lines, are a feature of an interferometric gravitational wave detector's output. Some lines are coherent between interferometers, in particular, the 2 km and 4 km LIGO Hanford instruments. This is of concern to data analysis techniques, such as the stochastic background search, that use correlations between instruments to detect gravitational radiation. Several techniques of `line removal' have been proposed. Where a line is attributable to a measurable environmental disturbance, a simple linear model may be fitted to predict, and subsequently subtract away, that line. This technique has been implemented (as the command oelslr) in the LIGO Data Analysis System (LDAS). We demonstrate its application to LIGO S1 data.

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