list). These lists were then parsed, and any joint $2\mathcal{F}$ values greater than the joint $2\mathcal{F}$ threshold of 60 were identified. Each such entry’s corresponding template was then added to a list of outliers. This method produced a list of 168 outliers for the entirety of the search band in the October data, and a list of 155 outliers for the entirety of the search band in the July-August data.

These outliers were then tested using *time shifts* and *extended looks*. In a time shift, the frequency parameters of the outliers from each data stretch (October and July-August) were evolved forwards or backwards in time, as appropriate, and sought in the opposite data stretch, under the assumption that a true astrophysical signal should be present in both data sets for the implicitly long-lived signals searched for here. A set of 1000 software injections (simulated signals with randomly generated parameters) underwent the same treatment to provide a baseline $2\mathcal{F}$ threshold for signal detection, and outliers surpassing the threshold were considered present.

In an extended look, each outlier was sought in an expanded 20-day coherence time encompassing the original nine-day coherence time; the same assumption of signal continuity would predict, roughly, a 