Ellipticity Correlation of the LSST PSF and Optimal Interpolation Scheme

Details Ellipticity Correlation of the LSST PSF and Optimal Interpolation Scheme Ellipticity Correlation of the LSST PSF and Optimal Interpolation Scheme

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21113727j&link_type=abstract

American Astronomical Society, AAS Meeting #211, #137.27; Bulletin of the American Astronomical Society, Vol. 39, p.983

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The main science goals of the Large Synoptic Survey Telescope (LSST) demand our ability to carefully model and separate the instrumental artifacts from the intrinsic shear signal caused by gravitational lensing. The dominant source of the systematics for the LSST (and also for other ground based facilities) is the spatial correlation of the point spread function (PSF) modulated by both atmospheric turbulence and optical aberrations. In this work, we present our full 3.5 degree field-of-view simulation of the Cerro Pachon's atmosphere with a six layer phase-screen model and its impact on the LSST's spatial PSF correlation. We demonstrate that these systematics can be efficiently controlled with our optimal PSF interpolation scheme.

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