Brumback, McKinley C.McKinley C.BrumbackGrefenstette, Brian W.Brian W.GrefenstetteBuisson, Douglas J. K.Douglas J. K.BuissonBACHETTI, MatteoMatteoBACHETTIConnors, RileyRileyConnorsGarcía, Javier A.Javier A.GarcíaJaodand, AmrutaAmrutaJaodandKrivonos, RomanRomanKrivonosLudlam, ReneeReneeLudlamMadsen, Kristin K.Kristin K.MadsenMASTROSERIO, GuglielmoGuglielmoMASTROSERIOTomsick, John A.John A.TomsickWik, DanielDanielWik2022-05-092022-05-0920220004-637Xhttp://hdl.handle.net/20.500.12386/32096StrayCats, the catalog of NuSTAR stray light observations, contains data from bright X-ray sources that fall within crowded source regions. These observations offer unique additional data with which to monitor sources such as X-ray binaries that show variable timing behavior. In this work, we present a timing analysis of stray light data of the high-mass X-ray binary SMC X-1, the first scientific analysis of a single source from the StrayCats project. We describe the process of screening stray light data for scientific analysis, verify the orbital ephemeris, and create both time- and energy-resolved pulse profiles. We find that the orbital ephemeris of SMC X-1 is unchanged and confirm a long-term spin-up rate of ν˙=(2.52±0.03)×10−11 Hz s-1. We also note that the shape of SMC X-1's pulse profile, while remaining double peaked, varies significantly with time and only slightly with energy.STAMPAenArticle10.3847/1538-4357/ac4d24https://iopscience.iop.org/article/10.3847/1538-4357/ac4d242022ApJ...926..187BFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_10 High energy and particle astronomy – X-rays, cosmic rays, gamma rays, neutrinos