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Image analysis for cosmology : shape measurement challenge review & results from the mapping dark matter challenge
- Source :
- Astronomy and computing, 2015, Vol.10, pp.9-21 [Peer Reviewed Journal], NASA Astrophysics Data System
- Publication Year :
- 2015
- Publisher :
- Elsevier, 2015.
-
Abstract
- In this paper we present results from the Mapping Dark Matter competition that expressed the weak lensing shape measurement task in its simplest form and as a result attracted over 700 submissions in 2 months and a factor of 3 improvement in shape measurement accuracy on high signal to noise galaxies, over previously published results, and a factor 10 improvement over methods tested on constant shear blind simulations. We also review weak lensing shape measurement challenges, including the Shear TEsting Programmes (STEP1 and STEP2) and the GRavitational lEnsing Accuracy Testing competitions (GREAT08 and GREAT10).<br />Comment: 20 pages, 12 figures. Solicited submission to New Astronomy Reviews
- Subjects :
- Physics
Accuracy and precision
Dark matter
Gravitational lensing
Astronomy and Astrophysics
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Cosmology
Galaxy
Computer Science Applications
Image analysis
Gravitational lens
Space and Planetary Science
Dark energy
Statistical physics
Astrophysics - Instrumentation and Methods for Astrophysics
Shear testing
Weak gravitational lensing
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Astronomy and computing, 2015, Vol.10, pp.9-21 [Peer Reviewed Journal], NASA Astrophysics Data System
- Accession number :
- edsair.doi.dedup.....a92f1099f32a81ecae50c447bcb04390
- Full Text :
- https://doi.org/10.1016/j.ascom.2014.12.004