Search for continuous gravitational waves from Fomalhaut b in the second Advanced LIGO observing run with a hidden Markov model. (arXiv:2007.08732v3 [gr-qc] UPDATED)
<a href="http://arxiv.org/find/gr-qc/1/au:+Jones_D/0/1/0/all/0/1">Dana Jones</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Sun_L/0/1/0/all/0/1">Ling Sun</a>
Results are presented from a semicoherent search for continuous gravitational
waves from a nearby neutron star candidate, Fomalhaut b, using data collected
in the second observing run of Advanced LIGO. The search is based on a hidden
Markov model scheme, capable of tracking signal frequency evolution from the
star’s secular spin down and stochastic timing noise simultaneously. The scheme
is combined with a frequency domain matched filter ($mathcal{F}$-statistic),
calculated coherently over five-day time stretches. The frequency band 100-1000
Hz is searched. After passing the above-threshold candidates through a
hierarchy of vetoes, one candidate slightly above the 1% false alarm
probability threshold remains for further scrutiny. No strong evidence of
continuous waves is found. We present the strain upper limits in the full
frequency band searched at 90% confidence level.
Results are presented from a semicoherent search for continuous gravitational
waves from a nearby neutron star candidate, Fomalhaut b, using data collected
in the second observing run of Advanced LIGO. The search is based on a hidden
Markov model scheme, capable of tracking signal frequency evolution from the
star’s secular spin down and stochastic timing noise simultaneously. The scheme
is combined with a frequency domain matched filter ($mathcal{F}$-statistic),
calculated coherently over five-day time stretches. The frequency band 100-1000
Hz is searched. After passing the above-threshold candidates through a
hierarchy of vetoes, one candidate slightly above the 1% false alarm
probability threshold remains for further scrutiny. No strong evidence of
continuous waves is found. We present the strain upper limits in the full
frequency band searched at 90% confidence level.
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