We search Dark Energy Survey (DES) Year 3 imaging for galaxy-galaxy strong gravitational lenses using convolutional neural networks, extending previous work with new training sets and covering a wider range of redshifts and colors. We train two neural networks using images of simulated lenses, then use them to score postage stamp images of 7.9 million sources from the Dark Energy Survey chosen to have plausible lens colors based on simulations. We examine 1175 of the highest-scored candidates and identify 152 probable or definite lenses. Examining an additional 20,000 images with lower scores, we identify a further 247 probable or definite candidates. After including 86 candidates discovered in earlier searches using neural networks and 26 candidates discovered through visual inspection of blue-near-red objects in the DES catalog, we present a catalog of 511 lens candidates.
@article{arxiv.1905.10522,
title = {An extended catalog of galaxy-galaxy strong gravitational lenses discovered in DES using convolutional neural networks},
author = {C. Jacobs and T. Collett and K. Glazebrook and E. Buckley-Geer and H. T. Diehl and H. Lin and C. McCarthy and A. K. Qin and C. Odden and M. Caso Escudero and P. Dial and V. J. Yung and S. Gaitsch and A. Pellico and K. A. Lindgren and T. M. C. Abbott and J. Annis and S. Avila and D. Brooks and D. L. Burke and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and L. N. da Costa and J. De Vicente and P. Fosalba and J. Frieman and J. Garcia-Bellido and E. Gaztanaga and D. A. Goldstein and D. Gruen and R. A. Gruendl and J. Gschwend and D. L. Hollowood and K. Honscheid and B. Hoyle and D. J. James and E. Krause and N. Kuropatkin and O. Lahav and M. Lima and M. A. G. Maia and J. L. Marshall and R. Miquel and A. A. Plazas and A. Roodman and E. Sanchez and V. Scarpine and S. Serrano and I. Sevilla-Noarbe and M. Smith and F. Sobreira and E. Suchyta and M. E. C. Swanson and G. Tarle and V. Vikram and A. R. Walker and Y. Zhang},
journal= {arXiv preprint arXiv:1905.10522},
year = {2019}
}