Defining a weak lensing experiment in space

  title={Defining a weak lensing experiment in space},
  author={Mark S. Cropper and Henk Hoekstra and Thomas D. Kitching and Richard J. Massey and J{\'e}r{\^o}me Amiaux and Lance Miller and Yannick Mellier and Jason D. Rhodes and Barnaby T.P. Rowe and S. Pires and Curtis J Saxton and Roberto Scaramella},
  journal={Monthly Notices of the Royal Astronomical Society},
This paper describes the definition of a typical next-generation space-based weak gravitational lensing experiment. We first adopt a set of top-level science requirements from the literature, based on the scale and depth of the galaxy sample, and the avoidance of systematic effects in the measurements which would bias the derived shear values. We then identify and categorize the contributing factors to the systematic effects, combining them with the correct weighting, in such a way as to fit… Expand
Laboratory simulation of Euclid-like sky images to study the impact of CCD radiation damage on weak gravitational lensing
Euclid is the ESA mission to map the geometry of the dark universe. It uses weak gravitational lensing, which requires the accurate measurement of galaxy shapes over a large area in the sky.Expand
A study of the sensitivity of shape measurements to the input parameters of weak-lensing image simulations
Improvements in the accuracy of shape measurements are essential to exploit the statistical power of planned imaging surveys that aim to constrain cosmological parameters using weak lensing byExpand
Evaluating the effect of stellar multiplicity on the PSF of space-based weak lensing surveys
The next generation of space-based telescopes used for weak lensing surveys will require exquisite point spread function (PSF) determination. Previously negligible effects may become important in theExpand
Implications of a wavelength-dependent PSF for weak lensing measurements
The convolution of galaxy images by the point-spread function (PSF) is the dominant source of bias for weak gravitational lensing studies, and an accurate estimate of the PSF is required to obtainExpand
Initial Results from a Laboratory Emulation of Weak Gravitational Lensing Measurements
Weak gravitational lensing observations are a key science driver for the NASA Wide Field Infrared Survey Telescope (WFIRST). To validate the performance of the WFIRST infrared detectors, we haveExpand
Euclid preparation
In modern weak-lensing surveys, the common approach to correct for residual systematic biases in the shear is to calibrate shape measurement algorithms using simulations. These simulations must fullyExpand
GREAT3 results - I. Systematic errors in shear estimation and the impact of real galaxy morphology
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 lensingExpand
The effect of detector nonlinearity on WFIRST PSF profiles for weak gravitational lensing measurements
Weak gravitational lensing (WL) is one of the most powerful techniques to learn about the dark sector of the universe. To extract the WL signal from astronomical observations, galaxy shapes must beExpand
Euclid preparation
Our aim is to quantify the impact of systematic effects on the inference of cosmological parameters from cosmic shear. We present an end-to-end approach that introduces sources of bias in a modelledExpand
Euclid: Impact of non-linear and baryonic feedback prescriptions on cosmological parameter estimation from weak lensing cosmic shear
Upcoming surveys will map the growth of large-scale structure with unprecented precision, improving our understanding of the dark sector of the Universe. Unfortunately, much of the cosmologicalExpand


Optimal Surveys for Weak Lensing Tomography
Weak-lensing surveys provide a powerful probe of dark energy through the measurement of the mass distribution of the local Universe. A number of ground-based and space-based surveys are being plannedExpand
Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements
With a primary goal of conducting precision weak-lensing measurements from space, the COSMOS survey has imaged the largest contiguous area observed by Hubble Space Telescope to date, using theExpand
Origins of weak lensing systematics, and requirements on future instrumentation (or knowledge of instrumentation)
The first half of this paper explores the origin of systematic biases in the measurement of weak gravitational lensing. Compared to previous work, we expand the investigation of point spread functionExpand
Lensing Systematics from Space: Modeling PSF effects in the SNAP survey
Anisotropy in the point spread function (PSF) contributes a systematic error to weak lensing measurements. In this study we use a ray tracer that incorporates all the optical elements of the SNAPExpand
Evidence of the accelerated expansion of the Universe from weak lensing tomography with COSMOS
We present a comprehensive analysis of weak gravitational lensing by large-scale structure in the Hubble Space Telescope Cosmic Evolution Survey (COSMOS), in which we combine space-based galaxy shapeExpand
Point spread function calibration requirements for dark energy from cosmic shear
Context. The control of systematic effects when measuring background galaxy shapes is one of the main challenges for cosmic shear analyses. Aims. Study the fundamental limitations on shear accuracyExpand
Cosmology with weak lensing surveys.
  • D. Munshi, P. Valageas
  • Physics, Medicine
  • Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
  • 2005
Various aspects of probing the matter power spectrum and the bi-spectrum and other related statistics with weak lensing surveys are described to probe the background dynamics of the universe as well as the nature of dark matter and dark energy. Expand
Diagnosing Space Telescope Misalignment and Jitter Using Stellar Images
Accurate knowledge of the telescope's point-spread function (PSF) is essential for the weak gravitational lensing measurements that hold great promise for cosmological constraints. For spaceExpand
Systematic errors in future weak-lensing surveys: requirements and prospects for self-calibration
We study the impact of systematic errors on planned weak-lensing surveys and compute the requirements on their contributions so that they are not a dominant source of the cosmological parameter errorExpand
The Shear Testing Programme – I. Weak lensing analysis of simulated ground-based observations
The Shear Testing Programme (STEP) is a collaborative project to improve the accuracy and reliability of all weak lensing measurements in preparation for the next generation of wide-field surveys. InExpand