SDSS J133401.39+331534.3: A New Subarcsecond Gravitationally Lensed Quasar
Abstract
The quasar SDSS J133401.39+331534.3 at z = 2.426 is found to be a two-image gravitationally lensed quasar with the image separation of 0.833. The object is first identified as a lensed quasar candidate in the Sloan Digital Sky Survey Quasar Lens Search, and then confirmed as a lensed system from follow-up observations at the Subaru and University of Hawaii 2.2-meter telescopes. We estimate the redshift of the lensing galaxy to be 0.557 based on absorption lines in the quasar spectra as well as the color of the galaxy. In particular, we observe the system with the Subaru Telescope AO188 adaptive optics with laser guide star, in order to derive accurate astrometry, which well demonstrates the usefulness of the laser guide star adaptive optics imaging for studying strong lens systems. Our mass modeling with improved astrometry implies that a nearby bright galaxy apart from the lensing galaxy is likely to affect the lens potential.
Keywords
Cite
@article{arxiv.1107.1280,
title = {SDSS J133401.39+331534.3: A New Subarcsecond Gravitationally Lensed Quasar},
author = {Cristian E. Rusu and Masamune Oguri and Naohisa Inada and Issha Kayo and Masanori Iye and Yutaka Hayano and Shin Oya and Masayuki Hattori and Yoshihiko Saito and Meguru Ito and Yosuke Minowa and Tae-Soo Pyo and Hiroshi Terada and Hideki Takami and Makoto Watanabe},
journal= {arXiv preprint arXiv:1107.1280},
year = {2015}
}
Comments
24 pages, 6 figures. ApJ, in press