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Comment on "Analysis of Ringdown Overtones in GW150914''

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arxiv 2310.13869 v1 pith:DOB7Q54X submitted 2023-10-21 astro-ph.HE astro-ph.IMgr-qc

Maximiliano Isi , Will M. Farr This is my paper · ORCID
classification astro-ph.HEastro-ph.IMgr-qc
keywords gw150914analysiscodecommentcotestadataovertonepresence
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Cotesta et al. (2022) reanalyze the GW150914 ringdown, arguing against the presence of an overtone and suggesting claims of its detection in Isi et al. (2019) were driven by noise. Here we point out a number of technical errors in that analysis, including a software bug, and show that features highlighted as problematic are in fact expected and encountered in simulated data. After fixes, the code in used in Cotesta et al. (2022) produces results consistent with the presence of the overtone. All code and data are available at https://github.com/maxisi/gw150914_rd_comment

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