LIGO_casebook

ANDREW D. JACKSON et al
On the time lags of the LIGO signals
James Creswell, Sebastian von Hausegger, Andrew D.
Jackson, Hao Liu, Pavel Naselsky
(Submitted on 13 Jun 2017 (v1), last revised 9 Aug 2017 (this
version, v2))
To date, the LIGO collaboration has detected three gravitational wave (GW) events
appearing in both its Hanford and Livingston detectors. In this article we reexamine
the LIGO data with regard to correlations between the two detectors. With special
focus on GW150914, we report correlations in the detector noise which, at the time of
the event, happen to be maximized for the same time lag as that found for the event
itself. Specifically, we analyze correlations in the calibration lines in the vicinity of
35\,Hz as well as the residual noise in the data after subtraction of the best-fit
theoretical templates. The residual noise for the other two events, GW151226 and
GW170104, exhibits similar behavior. A clear distinction between signal and noise
therefore remains to be established in order to determine the contribution of
gravitational waves to the detected signals.
Comments:
Subjects:
The body of the current version is essentially identical to the previous one submitted to arxiv and
JCAP. In order to meet the various suggestions of the referees, we have included an extended
and detailed Appendix. This Appendix also contains significant new results that provide
additional support for our conclusions. This version of our manuscript has been accepted for
publication by JCAP
Instrumentation and Methods for Astrophysics (astro-ph.IM); General Relativity and Quantum
Cosmology (gr-qc)
DOI: 10.1088/1475-7516/2017/08/013
Cite as:
arXiv:1706.04191 [astro-ph.IM]
(or arXiv:1706.04191v2 [astro-ph.IM] for this version)
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