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Model Independent Tests of Cosmic Growth vs Expansion
Arman Shafieloo, Alex G. Kim, Eric V. Linder
We use Gaussian Processes to map the expansion history of the universe in a model independent manner from the Union2.1 supernovae data and then apply these reconstructed results to…
Large Synoptic Survey Telescope: Dark Energy Science Collaboration
LSST Dark Energy Science Collaboration
This white paper describes the LSST Dark Energy Science Collaboration (DESC), whose goal is the study of dark energy and related topics in fundamental physics with data from the La…
Gaussian Process Cosmography
Arman Shafieloo, Alex G. Kim, Eric V. Linder
Gaussian processes provide a method for extracting cosmological information from observations without assuming a cosmological model. We carry out cosmography -- mapping the time ev…
Dithering Strategies and Point-Source Photometry
Johan Samsing, Alex G. Kim
The accuracy in the photometry of a point source depends on the point-spread function (PSF), detector pixelization, and observing strategy. The PSF and pixel response describe the…