Toward a Measurement of the ISW Effect with PS1

Details Toward a Measurement of the ISW Effect with PS1 Toward a Measurement of the ISW Effect with PS1

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.4724g&link_type=abstract

American Astronomical Society, AAS Meeting #211, #47.24; Bulletin of the American Astronomical Society, Vol. 39, p.807

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a forward look at directly detecting dark energy with the Pan-STARRS survey through the integrated Sachs-Wolfe (ISW) effect. The ISW effect produces secondary anisotropies in the cosmic microwave background that may be measured by cross-correlating the CMB temperature map with a sample of foreground galaxies. A non-zero correlation is a direct signature of the accelerating universe. Existing measurements with WMAP and the SDSS Luminous Red Galaxy sample are limited by sky area. With a factor of 4 greater coverage, a sample of early-type galaxies from the PS1 3π Survey can provide the first robust measurement. We demonstrate the use of an optimal quadratic estimator to measure the cross-correlation, which gives improved error estimates over Monte Carlo methods.

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