@article{63526c9081a9450088fc2ffc417e3bf1,
title = "The redshift of a lensing galaxy in PMN J0134 - 0931",
abstract = "The Sloan Digital Sky Survey (SDSS) automatically targeted as a quasar candidate the recently discovered, gravitationally lensed, extremely reddened z = 2.2 quasar PMN 0134-0931. The SDSS spectrum exhibits Ca II absorption at z = 0.76451, which we identify as the redshift of a lensing galaxy. Hubble Space Telescope imaging shows that components C, D, and E of the system are significantly redder than components A or B and detects faint galaxy emission between D and A+B. The redshift of the dust responsible for the reddening remains unconstrained with current data. However, we outline a model wherein lensing and differential reddening by a z = 0.76451 galaxy pair can entirely explain this system.",
author = "Hall, \{Patrick B.\} and Richards, \{Gordon T.\} and York, \{Donald G.\} and Keeton, \{Charles R.\} and Bowen, \{David V.\} and Schneider, \{Donald P.\} and Schlegel, \{David J.\} and J. Brinkmann",
note = "Funding Information: 8All uncertainties are calculated from resampling a two-Gaussian fit to the data, constrained to one FWHM and the Ca II wavelength ratio, with IRAF NGAUSSFITS. The Image Reduction and Analysis Facility is distributed by the National Optical Astronomy Observatory, operated by the Association of Universities for Research in Astronomy (AURA), Inc., under contract to the NSF. Funding Information: We thank the anonymous referee for useful comments. The SDSS is a joint project of the University of Chicago, Fermilab, the Institute for Advanced Study, the Japan Participation Group, The Johns Hopkins University, Los Alamos National Laboratory, the Max-Planck-Institute for Astronomy, the Max-Planck-Institute for Astrophysics, New Mexico State University, Princeton University, the United States Naval Observatory, and the University of Washington. Apache Point Observatory, site of the SDSS telescopes, is operated by the Astrophysical Research Consortium. Funding for the SDSS has been provided by the Alfred P. Sloan Foundation, SDSS member institutions, the National Aeronautics and Space Administration, the National Science Foundation, the US Department of Energy, the Japanese Mon-bukagakusho, and the Max Planck Society. P. B. H. is supported by FONDECYT grant 1010981, and D. P. S. and G. T. R. by NSF grant 99-00703.",
year = "2002",
month = aug,
day = "20",
doi = "10.1086/342784",
language = "English (US)",
volume = "575",
pages = "L51--L54",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "American Astronomical Society",
number = "2 II",
}