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Discovery of the Lensed Quasar System DES J0408-5354

Author(s): Lin, H; Buckley-Geer, E; Agnello, A; Ostrovski, F; McMahon, RG; et al

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Abstract: We report the discovery and spectroscopic confirmation of the quad-like lensed quasar system DES J0408-5354 found in the Dark Energy Survey (DES) Year 1 (Y1) data. This system was discovered during a search for DES Y1 strong lensing systems using a method that identified candidates as red galaxies with multiple blue neighbors. DES J0408-5354 consists of a central red galaxy surrounded by three bright (i < 20) blue objects and a fourth red object. Subsequent spectroscopic observations using the Gemini South telescope confirmed that the three blue objects are indeed the lensed images of a quasar with redshift z = 2.375, and that the central red object is an early-type lensing galaxy with redshift z = 0.597. DES J0408-5354 is the first quad lensed quasar system to be found in DES and begins to demonstrate the potential of DES to discover and dramatically increase the sample size of these very rare objects.
Publication Date: 1-Apr-2017
Electronic Publication Date: 27-Mar-2017
Citation: Lin, H, Buckley-Geer, E, Agnello, A, Ostrovski, F, McMahon, RG, Nord, B, Kuropatkin, N, Tucker, DL, Treu, T, Chan, JHH, Suyu, SH, Diehl, HT, Collett, T, Gill, MSS, More, A, Amara, A, Auger, MW, Courbin, F, Fassnacht, CD, Frieman, J, Marshall, PJ, Meylan, G, Rusu, CE, Abbott, TMC, Abdalla, FB, Allam, S, Banerji, M, Bechtol, K, Benoit-Levy, A, Bertin, E, Brooks, D, Burke, DL, Carnero Rosell, A, Kind, M Carrasco, Carretero, J, Castander, FJ, Crocce, M, D Andrea, CB, da Costa, LN, Desai, S, Dietrich, JP, Eifler, TF, Finley, DA, Flaugher, B, Fosalba, P, Garcia-Bellido, J, Gaztanaga, E, Gerdes, DW, Goldstein, DA, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Honscheid, K, James, DJ, Kuehn, K, Lahav, O, Li, TS, Lima, M, Maia, MAG, March, M, Marshall, JL, Martini, P, Melchior, P, Menanteau, F, Miquel, R, Ogando, RLC, Plazas, AA, Romer, AK, Sanchez, E, Schindler, R, Schubnell, M, Sevilla-Noarbe, I, Smith, M, Smith, RC, Sobreira, F, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D, Walker, AR, Collaboration, DES. (2017). Discovery of the Lensed Quasar System DES J0408-5354. ASTROPHYSICAL JOURNAL LETTERS, 838 (10.3847/2041-8213/aa624e
DOI: doi:10.3847/2041-8213/aa624e
ISSN: 2041-8205
EISSN: 2041-8213
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Type of Material: Journal Article
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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