H-band LC for 7 DEHVILS Milky Way Cepheids

Due to the crowded nature of these fields caused by defocusing the Camera, we performed difference-imaging photometry by modifying a pipeline originally developed to analyze images from the Transiting Exoplanet Survey Satellite.

We achieved a photometric precision in line with expectations from photon statistics, reaching 0.01mag for 8<~H<~11mag. We used the resulting Cepheid light curves to derive corrections to "mean light" for random-phase Hubble Space Telescope observations in F160W. We find good agreement with previous phase corrections based on VI light curves from the literature, with a mean difference of -1+/-6mmag.