CFHT MegaCam Two Deep Fields Imaging Survey (2DFIS) I: Overview
Abstract
We present the Two Deep Fields Imaging Survey (2DFIS), a wide-field imaging program conducted with the Canada-France-Hawaii Telescope (CFHT) targeting two astrophysically distinct regions: one containing a repeating fast radio burst (FRB) source and another hosting a candidate of a rotating galaxy cluster. Achieving a depth of r~26mag, the survey enables a search for faint optical counterparts and environmental signatures associated with the FRB, while high-quality photometric and galaxy shape measurements in the cluster field support a weak-lensing analysis of its mass distribution. This paper describes the observing strategy and data processing methodology adopted for 2DFIS, including the use of the LSST Science Pipelines with survey-specific adaptations for CFHT/MegaCam data. We outline a complete workflow for transforming raw CFHT exposures into science-ready data products, including calibrated single-epoch images, multi-band coadded mosaics, and extensive source catalogs. These data products provide the foundation for ongoing and future studies of FRB host environments, cluster mass reconstruction, and related cosmological applications.
Keywords
Cite
@article{arxiv.2602.08312,
title = {CFHT MegaCam Two Deep Fields Imaging Survey (2DFIS) I: Overview},
author = {Binyang Liu and Wentao Luo and Martin Kilbinger and Shenming Fu and Ian Dell'Antonio and Liping Fu and Xian Zhong Zheng and Yi-fu Cai and Cheng Jia and Ning Jiang and Qinxun Li and Yicheng Li and Shurui Lin and Christopher J. Miller and Surhud S. More and Huiyuan Wang and Yibo Wang},
journal= {arXiv preprint arXiv:2602.08312},
year = {2026}
}
Comments
28 pages, 12 figures, 3 tables