eBOSS Strong Gravitational Lens Detection Catalog

Michael Talbot, Joel Brownstein

This catalog contains 838 likely, 448 probable, and 265 possible strong galaxy-galaxy gravitational lens systems contained within the final data release of eBOSS, within Data Release 16 of SDSS-IV. These candidates were spectroscopically detected within v5_13_0 using the algorithm of the BELLS and SLACS surveys (Brownstein et al. 2012) while adding new inspection tools upon the predecessor's inspection methods to better refine the sample (Talbot et al. 2020).

The catalog contains 288 candidates that display two or more detected emission-line candidates with high signal-to-noise and 1263 detections that demonstrate an OII(b,a) doublet with high signal-to-noise. The catalog contains detection results, foreground subtraction data, emission-line information derived from Gaussian fits, and imaging from the SDSS Legacy Survey and from the DeCam Legacy, Mayall z-band Legacy, and the Beijing-Arizona Sky surveys contained within the Dark Energy Spectroscopic Instrument survey. These new tools enable the user to examine detection signals and observe probable lensing features, as was observed in 477 images during the inspection process. With more than 838 detections surpassing the BELLS criteria, this survey largely surpasses the candidate count of previous surveys, which was made possible since most of the 2 million galaxies in the BOSS/eBOSS surveys were not searched for common emission-lines of background sources.

For more details on this catalog, please see Talbot et al. (2020).