LISA data analysis I: Doppler demodulation
Abstract
The orbital motion of the Laser Interferometer Space Antenna (LISA) produces amplitude, phase and frequency modulation of a gravitational wave signal. The modulations have the effect of spreading a monochromatic gravitational wave signal across a range of frequencies. The modulations encode useful information about the source location and orientation, but they also have the deleterious affect of spreading a signal across a wide bandwidth, thereby reducing the strength of the signal relative to the instrument noise. We describe a simple method for removing the dominant, Doppler, component of the signal modulation. The demodulation reassembles the power from a monochromatic source into a narrow spike, and provides a quick way to determine the sky locations and frequencies of the brightest gravitational wave sources.
Cite
@article{arxiv.gr-qc/0206017,
title = {LISA data analysis I: Doppler demodulation},
author = {Neil Cornish and Shane Larson},
journal= {arXiv preprint arXiv:gr-qc/0206017},
year = {2009}
}
Comments
5 pages, 7 figures. References and new comments added