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NASA's TESS mission \citep{tess} has produced high precision photometry ofmillions of stars to the community. The majority of TESS observations have aduration of $\approx$27 days, corresponding to a single observation during aTESS sector. A small subset of TESS targets are observed for multiple sectors,with approximately 1-2\% of targets falling in the Continuous Viewing Zone(CVZ) during the prime mission \citep{yield}, where targets are observedcontinuously for a year. These targets are highly valuable for extracting longperiod rotation rates, which can be linked to stellar ages. We present a pipinstallable Python tool for extracting long period rotation rates in the TESSCVZ, while simultaneously mitigating instrument systematics.

Systematics-insensitive Periodogram for finding periods in TESS observations of long-period rotators