Lin, H;
Buckley-Geer, E;
Agnello, A;
Ostrovski, F;
McMahon, RG;
Nord, B;
Kuropatkin, N;
... Walker, AR; + view all
(2017)
Discovery of the Lensed Quasar System DES J0408-5354.
Astrophysical Journal Letters
, 838
(2)
10.3847/2041-8213/aa624e.
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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.
| Type: | Article |
|---|---|
| Title: | Discovery of the Lensed Quasar System DES J0408-5354 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/2041-8213/aa624e |
| Publisher version: | https://doi.org/10.3847/2041-8213/aa624e |
| Language: | English |
| Additional information: | © 2017. The American Astronomical Society. All rights reserved. |
| Keywords: | Gravitational lensing: strong; quasars: general; surveys |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1540491 |
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