New Strong Gravitational Lenses from the DESI Legacy Imaging Surveys Data Release 9

Abstract

We have conducted a search for strong gravitational lensing systems in the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys Data Release 9. This is the third paper in a series. These surveys together cover $\sim$19,000 deg${}^2$ visible from the Northern Hemisphere, reaching a z-band AB magnitude of $\sim$22.5. We use a deep residual neural network, trained on a compilation of known lensing systems and high-grade candidates as well as nonlenses in the same footprint. After applying our trained neural network to the survey data, we visually inspect and rank images with probabilities above a threshold which has been chosen to balance precision and recall. We have found 1895 lens candidates, of which 1512 are identified for the first time. Combining the discoveries from this work with those from Papers I (335) and II (1210), we have discovered a total of 3057 new candidates in the Legacy Surveys.

Updated final version of manuscript published by the Astronomical Journal, 11 pages, 10 figures, 4 tables. arXiv admin note: text overlap with arXiv:2005.04730

References in corpus (25)

• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• The Sloan Lens ACS Survey. V. The Full ACS Strong-Lens Sample
• Bayesian Strong Gravitational-Lens Modeling on Adaptive Grids: Objective Detection of Mass Substructure in Galaxies
• CLASH-VLT: Insights on the mass substructures in the Frontier Fields Cluster MACS J0416.1-2403 through accurate strong lens modeling
• LinKS: Discovering galaxy-scale strong lenses in the Kilo-Degree Survey using Convolutional Neural Networks
• The Sloan Lens ACS Survey. XIII. Discovery of 40 New Galaxy-Scale Strong Lenses
• Strong lens systems search in the Dark Energy Survey using Convolutional Neural Networks
• High-quality strong lens candidates in the final Kilo Degree survey footprint
• HOLISMOKES. VI. New galaxy-scale strong lens candidates from the HSC-SSP imaging survey
• Mining for Strong Gravitational Lenses with Self-supervised Learning
• Turning Gravitationally Lensed Supernovae into Cosmological Probes
• Lensed Type Ia Supernova "Encore" at z=2: The First Instance of Two Multiply-Imaged Supernovae in the Same Host Galaxy
• Improved time-delay lens modelling and $H_0$ inference with transient sources
• Shock cooling of a red-supergiant supernova at redshift 3 in lensed images
• From Images to Dark Matter: End-To-End Inference of Substructure From Hundreds of Strong Gravitational Lenses
• Strong lensing in UNIONS: Toward a pipeline from discovery to modeling
• GIGA-Lens: Fast Bayesian Inference for Strong Gravitational Lens Modeling
• LensWatch: I. Resolved HST Observations and Constraints on the Strongly-Lensed Type Ia Supernova 2022qmx ("SN Zwicky")
• Survey of Gravitationally-lensed Objects in HSC Imaging (SuGOHI). VIII. New galaxy-scale lenses from the HSC SSP
• The impact of human expert visual inspection on the discovery of strong gravitational lenses
• VLT/Magellan spectroscopy of 29 strong lensing selected galaxy clusters
• The DES Bright Arcs Survey: Candidate Strongly Lensed Galaxy Systems from the Dark Energy Survey 5,000 Sq. Deg. Footprint
• Double Source Lensing Probing High Redshift Cosmology
• Retrospective Search for Strongly Lensed Supernovae in the DESI Legacy Imaging Surveys
• Measuring the Substructure Mass Power Spectrum of 23 SLACS Strong Galaxy-Galaxy Lenses with Convolutional Neural Networks

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• HOLISMOKES XV. Search for strong gravitational lenses combining ground-based and space-based imaging
• The revolution in strong lensing discoveries from Euclid
• Searching for strong lensing by late-type galaxies in UNIONS
• HOLISMOKES XVI: Lens search in HSC-PDR3 with a neural network committee and post-processing for false-positive removal
• A compact group lens modeled with GIGA-Lens: Enhanced inference for complex systems
• Confirming HSC strong lens candidates with DESI Spectroscopy. I. Project overview and first results
• Detection of Unresolved Strongly Lensed Supernovae with 7-Dimensional Telescope