1. 2MASS All-Sky Extended Source Catalog ID: ivo://irsa.ipac/2MASS/Catalog/XSC Title: 2MASS All-Sky Extended Source Catalog Short Name: 2MASS-XSC Date: 25 May 2021 00:17:54 Publisher: NASA/IPAC Infrared Science Archive Description: 2MASS has uniformly scanned the entire sky in three near-infrared bands to detect and characterize point sources brighter than about 1 mJy in each band, with signal-to-noise ratio (SNR) greater than 1.