Add to ORKGTelescope Point Spread Function (PSF) quality is critical for realising the potential of cosmic weak lensing observations to constrain dark energy and test General Relativity. In this paper we use quantitative weak gravitational lensing measures to inform the precision of lens optical alignment, with specific reference to the Dark Energy Survey (DES). We compute optics spot diagrams and calculate the shear and flexion of the PSF as a function of position on the focal plane. For perfect optical alignment we verify the high quality of the DES optical design, finding a maximum PSF contribution to the weak lensing shear of 0.04 near the edge of the focal plane. However this can be increased by a factor of approximately three if the lenses are o...
The first half of this paper explores the origin of systematic biases in the measurement of weak gra...
Weak gravitational lensing has proven to be a powerful tool to map directly the distribution of dark...
International audienceUsing the first three years of data from the Dark Energy Survey (DES), we use ...
Dark energy is one of the most important unsolved problems in modern Physics, and weak gravitational...
In this dissertation, we first present an analysis on the effect of wind at the Blanco Telescope, th...
This thesis describes an investigation into weak gravitational lensing, a unique and powerful astron...
In this dissertation, we first present an analysis on the effect of wind at the Blanco Telescope, th...
We present a comprehensive description of all components of cosmic shear measurements via weak gravi...
The wealth of incoming and future cosmological observations will allow us to map out the structure a...
A wide-field space-based imaging telescope is necessary to fully exploit the technique of observing ...
The first half of this paper explores the origin of systematic biases in the mea-surement of weak gr...
A wide field space-based imaging telescope is necessary to fully exploit the technique of observing ...
In recent years, cosmological science has developed a highly predictive model for the universe on la...
Gravitational lensing provides some of the most compelling evidence for the existence of dark matter...
The first half of this paper explores the origin of systematic biases in the measurement of weak gra...
Weak gravitational lensing has proven to be a powerful tool to map directly the distribution of dark...
International audienceUsing the first three years of data from the Dark Energy Survey (DES), we use ...
Dark energy is one of the most important unsolved problems in modern Physics, and weak gravitational...
In this dissertation, we first present an analysis on the effect of wind at the Blanco Telescope, th...
This thesis describes an investigation into weak gravitational lensing, a unique and powerful astron...
In this dissertation, we first present an analysis on the effect of wind at the Blanco Telescope, th...
We present a comprehensive description of all components of cosmic shear measurements via weak gravi...
The wealth of incoming and future cosmological observations will allow us to map out the structure a...
A wide-field space-based imaging telescope is necessary to fully exploit the technique of observing ...
The first half of this paper explores the origin of systematic biases in the mea-surement of weak gr...
A wide field space-based imaging telescope is necessary to fully exploit the technique of observing ...
In recent years, cosmological science has developed a highly predictive model for the universe on la...
Gravitational lensing provides some of the most compelling evidence for the existence of dark matter...
The first half of this paper explores the origin of systematic biases in the measurement of weak gra...
Weak gravitational lensing has proven to be a powerful tool to map directly the distribution of dark...
International audienceUsing the first three years of data from the Dark Energy Survey (DES), we use ...