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Discovery of the lensed quasar system DES J0408-5354
journal contribution
posted on 2023-06-09, 06:14 authored by Kathy RomerKathy Romer, The DES CollaborationWe 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.
Funding
Astronomy Centre Rolling Grant; G0679; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/F002858/1
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Publication status
- Published
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- Published version
Journal
Astrophysical Journal LettersISSN
2041-8205Publisher
Institute of PhysicsExternal DOI
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2Volume
838Page range
L15Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Astronomy Centre Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-05-10First Open Access (FOA) Date
2017-05-10First Compliant Deposit (FCD) Date
2017-05-10Usage metrics
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