Joint electromagnetic and gravitational-wave (GW) observation is a major goal of both the GW astronomy and electromagnetic astronomy communities for the coming decade. One way to accomplish this goal is to direct follow-up of GW candidates. Prompt electromagnetic emission may fade quickly, therefore it is desirable to have GW detection happen as quickly as possible. A leading source of latency in GW detection is the whitening of the data. We examine the performance of a zero-latency whitening filter in a detection pipeline for compact binary coalescence (CBC) GW signals. We find that the filter reproduces signal-to-noise ratio (SNR) sufficiently consistent with the results of the original high-latency and phase-preserving filter for both noise and artificial GW signals (called "injections"). Additionally, we demonstrate that these two whitening filters show excellent agreement in χ2 value, a discriminator for GW signals.
@article{arxiv.1708.04125,
title = {Application of a Zero-latency Whitening Filter to Compact Binary Coalescence Gravitational-wave Searches},
author = {Leo Tsukada and Kipp Cannon and Chad Hanna and Drew Keppel and Duncan Meacher and Cody Messick},
journal= {arXiv preprint arXiv:1708.04125},
year = {2018}
}