Optimizing SNAP for Weak Lensing

Details Optimizing SNAP for Weak Lensing Optimizing SNAP for Weak Lensing

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.6502h&link_type=abstract

American Astronomical Society Meeting 205, #65.02; Bulletin of the American Astronomical Society, Vol. 36, p.1454

Astronomy and Astrophysics

Astronomy

Scientific paper

The Supernova/Acceleration Probe (SNAP) satellite proposes to measure weak gravitational lensing in addition to type Ia supernovae. Its pixel scale has been set to 0.10 arcsec per pixel as established by the needs of supernova observations. To find the optimal pixel scale for accurate weak lensing measurements we conduct a tradeoff study in which, via simulations, we fix the suvey size in total pixels and vary the pixel scale. Our preliminary results show that with a smaller scale of about 0.08 arcsec per pixel we can minimize the contribution of intrinsic shear variance to the error on the power spectrum of mass density distortion. Currently we are testing the robustness of this figure as well as determining whether dithering yields analogous results.

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