Article

# The SDSS Discovery of a Strongly Lensed Post-Starburst Galaxy at z=0.766

04/2008; DOI:doi:10.1088/0004-6256/136/1/44
Source: arXiv

ABSTRACT We present the first result of a survey for strong galaxy-galaxy lenses in Sloan Digital Sky Survey (SDSS) images. SDSS J082728.70+223256.4 was selected as a lensing candidate using selection criteria based on the color and positions of objects in the SDSS photometric catalog. Follow-up imaging and spectroscopy showed this object to be a lensing system. The lensing galaxy is an elliptical at z = 0.349 in a galaxy cluster. The lensed galaxy has the spectrum of a post-starburst galaxy at z = 0.766. The lensing galaxy has an estimated mass of $\sim 1.2 \times 10^{12} M_{\odot}$ and the corresponding mass to light ratio in the B-band is $\sim 26 M_{\odot}/L_{\odot}$ inside 1.1 effective radii of the lensing galaxy. Our study shows how catalogs drawn from multi-band surveys can be used to find strong galaxy-galaxy lenses having multiple lens images. Our strong lensing candidate selection based on photometry-only catalogs will be useful in future multi-band imaging surveys such as SNAP and LSST. Comment: Accepted for publication in AJ

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### Keywords

Accepted

color

estimated mass

first result

Follow-up imaging

future multi-band imaging surveys

galaxy cluster

lensed galaxy

lensing candidate

lensing galaxy

lensing system

light ratio

multi-band surveys

multiple lens images

photometry-only catalogs

SDSS photometric catalog

Sloan Digital Sky Survey

strong galaxy-galaxy lenses

strong lensing candidate selection