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Discovery of two gravitationally lensed quasars in the Dark Energy Survey
Adriano Agnello, Tommaso Treu, Fernanda Ostrovski +77
We present spectroscopic confirmation of two new lensed quasars via data obtained at the 6.5m Magellan/Baade Telescope. The lens candidates have been selected from the Dark Energy…
Space Warps: I. Crowd-sourcing the Discovery of Gravitational Lenses
Philip J. Marshall, Aprajita Verma, Anupreeta More +20
We describe Space Warps, a novel gravitational lens discovery service that yields samples of high purity and completeness through crowd-sourced visual inspection. Carefully produce…
Space Warps II. New Gravitational Lens Candidates from the CFHTLS Discovered through Citizen Science
Anupreeta More, Aprajita Verma, Philip J. Marshall +18
We report the discovery of 29 promising (and 59 total) new lens candidates from the CFHT Legacy Survey (CFHTLS) based on about 11 million classifications performed by citizen scien…
Correcting the z~8 Galaxy Luminosity Function for Gravitational Lensing Magnification Bias
Charlotte A. Mason, Tommaso Treu, Kasper B. Schmidt +7
We present a Bayesian framework to account for the magnification bias from both strong and weak gravitational lensing in estimates of high-redshift galaxy luminosity functions. We…
The Red Radio Ring: a gravitationally lensed hyperluminous infrared radio galaxy at z=2.553 discovered through citizen science
J. E. Geach, A. More, A. Verma +49
We report the discovery of a gravitationally lensed hyperluminous infrared galaxy (L_IR~10^13 L_sun) with strong radio emission (L_1.4GHz~10^25 W/Hz) at z=2.553. The source was ide…
Probing the inner kpc of massive galaxies with strong gravitational lensing
Yashar D. Hezaveh, Philip J. Marshall, Roger D. Blandford
We examine the prospects of detecting demagnified images of gravitational lenses in observations of strongly lensed mm-wave molecular emission lines with ALMA. We model the lensing…