Chapitres
- From
galaxies to catalogues.
- Noise
and systematic effects : point
spread function, camera
distortion, effect of pixels
- Measuring
weak shear: ellipticity,moments,
Kaiser-Squires-Broadhurst method
- STEP/GREAT
and MDM measurement challenge
- New
shape measurement methods
- Remaining
problems in measurement methods
- From
statistics to physics
- Theoretical
correlation function predictions
from theory
- Growth
factor, geometrical kernel and
matter power spectrum dependence
- Dependence
on Dark Energy and modifications
to gravity
- Fisher
forecasts : MCMC
- Prospects
for Dark Energy projects
Résumé
In
this course, taught jointly
between David
Bacon and Tom Kitching, we
will survey the vibrant field of
cosmological weak lensing. After
introducing the basic concepts of
gravitational lensing in a GR
framework, we will take the class
on a journey through the process
of using weak lensing to constrain
cosmology. We will follow the
photons from distant galaxies,
consider the effect of atmosphere
and telescope, and discuss how to
measure the distorted shapes of
the galaxy images on our
detectors. We will then show how
to use the shape information to
obtain statistical quantities
(e.g. the shear correlation
function) relevant to cosmology.
We will explain the cosmological
dependence of these statistics,
and show the prospects for
constraining cosmological
parameters with forthcoming
surveys.
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Bibliography
- For
general reviews
- For GR derivations
- For accessible
introductions to shape measurement
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