SDSS J1335+0118: A New Two-Image Gravitational Lens

Publication information:

Oguri M, Inada N, Castander F, Gregg M, Becker R, Ichikawa S- ichi, Pindor B, Brinkmann J, Eisenstein D, Frieman J, et al. SDSS J1335+0118: A New Two-Image Gravitational Lens. Publications of the Astronomical Society of Japan. 2004;56:399–405.

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Abstract

We report on the discovery of the two-image gravitationally lensedquasar SDSSJ1335 + 0118. The object was selected as a lens candidatefrom the Sloan Digital Sky Survey. The imaging and spectroscopicfollow-up observations confirm that the system exhibits twogravitationally lensed images of a quasar at z = 1.57. The imageseparation is 1''.56. We also detect an extended component between thetwo quasar images, likely to be a lensing galaxy. Preliminary massmodeling predicts a differential time delay, Δt of ˜30h^-1 day, assuming the redshift of the lens galaxy to be 0.5.