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

Diehl, H.T. and Buckley-Geer, E.J. and Lindgren, K.A. and Nord, B. and Gaitsch, H. and Gaitsch, S. and Lin, H. and Allam, S. and Collett, T.E. and Furlanetto, C. and Gill, M.S.S. and More, A. and Nightingale, J. and Odden, C. and Pellico, A. and Tucker, D.L. and Costa, L.N. da and Neto, A.Fausti and Kuropatkin, N. and Soares-Santos, M. and Welch, B. and Zhang, Y. and Frieman, J.A. and Abdalla, F.B. and Annis, J. and Benoit-Lévy, A. and Bertin, E. and Brooks, D. and Burke, D. L. and Rosell, A.Carnero and Kind, M.Carrasco and Carretero, J. and Cunha, C.E. and D’Andrea, C.B. and Desai, S. and Dietrich, J.P. and Drlica-Wagner, A. and Evrard, A.E. and Finley, D.A. and Flaugher, B. and García-Bellido, J. and Gerdes, D.W. and Goldstein, D.A. and Gruen, D. and Gruendl, R.A. and Gschwend, J. and Gutierrez, G. and James, D.J. and Kuehn, K. and Kuhlmann, S. and Lahav, O. and Li, T.S. and Lima, M. and Maia, M.A.G. and Marshall, J.L. and Menanteau, F. and Miquel, R. and Nichol, R.C. and Nugent, P. and Ogando, R.L.C. and Plazas, A.A. and Reil, K. and Romer, A.K. and Sako, M. and Sanchez, E. and Santiago, B. and Scarpine, V. and Schindler, R. and Schubnell, M. and Sevilla-Noarbe, I. and Sheldon, E. and Smith, M. and Sobreira, F. and Suchyta, E. and Swanson, M.E.C. and Tarle, G. and Thomas, D. and Walker, A.R. (2017) The DES bright arcs survey: hundreds of candidate strongly lensed galaxy systems from the Dark Energy Survey Science Verification and Year 1 observations. Astrophysical Journal Supplement Series, 232 (1). p. 15. ISSN 1538-4365

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Abstract

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 (10σ) of 23.0. The Year 1 data span approximately 2000 sq. deg. and have anti-band limiting magnitude for extended objects (10σ) 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.

Item Type: Article
Keywords: galaxies: high-redshift – gravitational lensing: strong
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.3847/1538-4365/aa8667
Depositing User: Eprints, Support
Date Deposited: 20 Oct 2017 13:02
Last Modified: 21 Oct 2017 11:42
URI: http://eprints.nottingham.ac.uk/id/eprint/47410

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