The ELAIS-S1 field will be an LSST Deep Drilling field, and it also has extensive multiwavelength coverage. To improve the utility of the existing data, we use The Tractor to perform forced-photometry measurements in this field. We compile data in 16 bands from the DeepDrill, VIDEO, DES, ESIS, and VOICE surveys. Using a priori information from the high-resolution fiducial images in VIDEO, we model the images in other bands and generate a forced-photometry catalog. This technique enables consistency throughout different surveys, deblends sources from low-resolution images, extends photometric measurements to a fainter magnitude regime, and improves photometric-redshift estimates. Our catalog contains over 0.8 million sources covering a 3.4 deg2 area in the VIDEO footprint and is available at 10.5281/zenodo.4540178.
@article{arxiv.2102.11892,
title = {A Multi-Band Forced-Photometry Catalog in the ELAIS-S1 Field},
author = {Fan Zou and W. N. Brandt and Mark Lacy and Qingling Ni and Kristina Nyland and Guang Yang and Franz E. Bauer and Giovanni Covone and Aniello Grado and Nicola R. Napolitano and Maurizio Paolillo and Mario Radovich and Marilena Spavone and Mattia Vaccari},
journal= {arXiv preprint arXiv:2102.11892},
year = {2021}
}