We report the discovery of a new gravitationally lensed quasar , SDSS J131339.98 + 515128.3 , at a redshift of 1.875 with an image separation of 1 \aas@@fstack { \prime \prime } 24 .
The lensing galaxy is clearly detected in visible-light follow-up observations .
We also identify three absorption-line doublets in the spectra of the lensed quasar images , from which we measure the lens redshift to be 0.194 .
Like several other known lenses , the lensed quasar images have different continuum slopes .
This difference is probably the result of reddening and microlensing in the lensing galaxy .
The lensed quasar was selected by correlating Sloan Digital Sky Survey ( SDSS ) spectroscopic quasars with Two Micron All Sky Survey ( 2MASS ) sources and choosing quasars that show near-infrared ( IR ) excess .
The near-IR excess can originate , for example , from the contribution of the lensing galaxy at near-IR wavelengths .
We show that the near-IR excess technique is indeed an efficient method to identify lensed systems from a large sample of quasars .