Publications related to Einstein ring

The SDSS-III BOSS quasar lens survey: discovery of 13 gravitationally lensed quasars

We report the discovery of 13 confirmed two-image quasar lenses from a systematic search for gravitationally lensed quasars in the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS). We adopted a methodology similar to that used in the SDSS Quasar Len ...

Oxford Univ Press2016

Multi-band morpho-Spectral Component Analysis Deblending Tool (MuSCADeT): Deblending colourful objects

Frédéric Courbin, Rémy Elie Joseph

We introduce a new algorithm for colour separation and deblending of multi-band astronomical images called MuSCADeT which is based on Morpho-spectral Component Analysis of multi-band images. The MuSCADeT algorithm takes advantage of the sparsity of astrono ...

Edp Sciences S A2016

Discovery of two gravitationally lensed quasars in the Dark Energy Survey

Yi Zhang, Eduardo Sanchez, Frédéric Courbin, Georges Meylan, Adriano Agnello

We present spectroscopic confirmation of two new gravitationally lensed quasars, discovered in the Dark Energy Survey (DES) and Wide-field Infrared Survey Explorer (WISE) based on their multiband photometry and extended morphology in DES images. Images of ...

Oxford Univ Press2015

The Red Radio Ring: a gravitationally lensed hyperluminous infrared radio galaxy at z=2.553 discovered through the citizen science project SPACE WARPS

Jean-Paul Richard Kneib, Ajay Kumar Verma

We report the discovery of a gravitationally lensed hyperluminous infrared galaxy (intrinsic L-IR approximate to 10(13) L-circle dot) with strong radio emission (intrinsic L-1.4 GHz approximate to 10(25) WHz(-1)) at z = 2.553. The source was identified in ...

Oxford University Press2015

First measurement of the cross-correlation of CMB lensing and galaxy lensing

Jean-Paul Richard Kneib, Huanyuan Shan

We measure the cross-correlation of cosmic microwave background (CMB) lensing convergence maps derived from Atacama Cosmology Telescope data with galaxy lensing convergence maps as measured by the Canada-France-Hawaii Telescope Stripe 82 Survey. The CMB-ga ...

Amer Physical Soc2015

GREAT3 results - I. Systematic errors in shear estimation and the impact of real galaxy morphology

Frédéric Courbin, Jean-Luc Starck, Thibault Adrien Kuntzer, Malte Tewes, Huanyuan Shan, Marc Gentile, Guldariya Nurbaeva, Jun Zhang

We present first results from the third GRavitational lEnsing Accuracy Testing (GREAT3) challenge, the third in a sequence of challenges for testing methods of inferring weak gravitational lensing shear distortions from simulated galaxy images. GREAT3 was ...

Oxford University Press2015

A PCA-based automated finder for galaxy-scale strong lenses

Jean-Paul Richard Kneib, Frédéric Courbin, Georges Meylan, Rémy Elie Joseph

We present an algorithm using principal component analysis (PCA) to subtract galaxies from imaging data and also two algorithms to find strong, galaxy-scale gravitational lenses in the resulting residual image. The combined method is optimised to find full ...

EDP Sciences2014

Cosmology From Gravitational Lens Time Delays And Planck Data

Frédéric Courbin, Georges Meylan, Malte Tewes

Under the assumption of a flat Lambda CDM cosmology, recent data from the Planck satellite point toward a Hubble constant that is in tension with that measured by gravitational lens time delays and by the local distance ladder. Prosaically, this difference ...

Iop Publishing Ltd2014

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Einstein ring

The SDSS-III BOSS quasar lens survey: discovery of 13 gravitationally lensed quasars

Multi-band morpho-Spectral Component Analysis Deblending Tool (MuSCADeT): Deblending colourful objects

Discovery of two gravitationally lensed quasars in the Dark Energy Survey

The Red Radio Ring: a gravitationally lensed hyperluminous infrared radio galaxy at z=2.553 discovered through the citizen science project SPACE WARPS

Galaxy Alignments: Observations and Impact on Cosmology

First measurement of the cross-correlation of CMB lensing and galaxy lensing

GREAT3 results - I. Systematic errors in shear estimation and the impact of real galaxy morphology

Galaxy Alignments: Theory, Modelling & Simulations

A PCA-based automated finder for galaxy-scale strong lenses

Cosmology From Gravitational Lens Time Delays And Planck Data

Graph Chatbot

Chat with Graph Search

Multi-band morpho-Spectral Component Analysis Deblending Tool (MuSCADeT): Deblending colourful objects

The Red Radio Ring: a gravitationally lensed hyperluminous infrared radio galaxy at z=2.553 discovered through the citizen science project SPACE WARPS

The SDSS-III BOSS quasar lens survey: discovery of 13 gravitationally lensed quasars

GREAT3 results - I. Systematic errors in shear estimation and the impact of real galaxy morphology

A PCA-based automated finder for galaxy-scale strong lenses

Galaxy Alignments: Observations and Impact on Cosmology

Galaxy Alignments: Theory, Modelling & Simulations

Discovery of two gravitationally lensed quasars in the Dark Energy Survey

First measurement of the cross-correlation of CMB lensing and galaxy lensing

Cosmology From Gravitational Lens Time Delays And Planck Data