LIGO Document P2100298-v8

Search of the Early O3 LIGO Data for Continuous Gravitational Waves from the Cassiopeia A and Vela Jr. Supernova Remnants

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P - Publications
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30 Nov 2021, 08:13
We present directed searches for continuous gravitational waves from the neutron stars in the Cassiopeia A (Cas A) and Vela Jr. supernova remnants. We carry out the searches in the LIGO data from the first six months of the third Advanced LIGO and Virgo observing run, using the Weave semi-coherent method, which sums matched-filter detection-statistic values over many time segments spanning the observation period.. No gravitational wave signal is detected in the search band of 20--976 Hz for assumed source ages greater than 300 years for Cas A and greater than 700 years for Vela Jr. Estimates from simulated continuous wave signals indicate we achieve the most sensitive results to date across the explored parameter space volume, probing to strain magnitudes as low as ~\(6.3\times10^{-26}\) for Cas A and ~\(5.6\times10^{-26}\) for Vela Jr. at frequencies near 166 Hz at 95% efficiency.
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Notes and Changes:
Revisions in response to PRD referee.

Note: after PRD acceptance, we noticed out-of-date outlier counts in the body of the text which are fixed in this reuploaded v8 draft, along with a relabeling of the O3a BSD FH search in the Figure 6 caption. These changes will also need to be incorporated at the PRD proofs stage.

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