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The DES bright arcs survey: hundreds of candidate strongly lensed galaxy systems from the Dark Energy Survey Science Verification and year 1 observations

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posted on 2023-06-09, 12:08 authored by H T Diehl, E J Buckley-Geer, K A Lindgren, B Nord, H Gaitsch, S Gaitsch, H Lin, S Allam, T E Collett, C Furlanetto, M S S Gill, A More, J Nightingale, C Odden, A Pellico, D L Tucker, L N da Costa, A Fausti Neto, N Kuropatkin, M Soares-Santos, B Welch, Y Zhang, J A Frieman, Kathy RomerKathy Romer, The DES Collaboration
We report the results of searches for strong gravitational lens systems in the Dark Energy Survey (DES) Science Verification and Year 1 observations. The Science Verification data span approximately 250 sq. deg. with a median i-band limiting magnitude for extended objects (10s) of 23.0. The Year 1 data span approximately 2000 sq. deg. and have an i-band limiting magnitude for extended objects (10s) of 22.9. As these data sets are both wide and deep, they are particularly useful for identifying strong gravitational lens candidates. Potential strong gravitational lens candidate systems were initially identified based on a color and magnitude selection in the DES object catalogs or because the system is at the location of a previously identified galaxy cluster. Cutout images of potential candidates were then visually scanned using an object viewer and numerically ranked according to whether or not we judged them to be likely strong gravitational lens systems. Having scanned nearly 400,000 cutouts, we present 374 candidate strong lens systems, of which 348 are identified for the first time. We provide the R.A. and decl., the magnitudes and photometric properties of the lens and source objects, and the distance (radius) of the source(s) from the lens center for each system.

History

Publication status

  • Published

File Version

  • Published version

Journal

Astrophysical Journal Supplement Series

ISSN

0067-0049

Publisher

American Astronomical Society

Issue

15

Volume

232

Page range

1-28

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-02-14

First Open Access (FOA) Date

2018-02-14

First Compliant Deposit (FCD) Date

2018-02-14

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