We present H-band light curves of Milky Way Classical Cepheids observed as part of the DEHVILS survey with the Wide-Field Infrared Camera on the United Kingdom InfraRed Telescope. 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 0.01 mag for 8 <= H <= 11 mag. 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 +/- 6 millimag.
@article{arxiv.2112.04597,
title = {H-band light curves of Milky Way Cepheids via Difference Imaging},
author = {Tarini Konchady and Ryan J. Oelkers and David O. Jones and Wenlong Yuan and Lucas M. Macri and Erik R. Peterson and Adam G. Riess},
journal= {arXiv preprint arXiv:2112.04597},
year = {2022}
}
Comments
Accepted for publication in the Astrophysical Journal Supplement Series. 14 pages, 6 figures