How accurately can suborbital experiments measure the CMB?

Details How accurately can suborbital experiments measure the CMB? How accurately can suborbital experiments measure the CMB?

2004-06-17

arxiv.org/abs/astro-ph/0406375v1

Phys.Rev.D71:043004,2005

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures. More info at http://www.hep.upenn.edu/~angelica/skymap.html QMASK data and covariance matrix at http://w

Scientific paper

10.1103/PhysRevD.71.043004

Great efforts are currently being channeled into ground- and balloon-based CMB experiments, mainly to explore anisotropy on small angular scales and polarization. To optimize instrumental design and assess experimental prospects, it is important to understand in detail the atmosphere-related systematic errors that limit the science achievable with new suborbital instruments. For this purpose, we spatially compare the 648 square degree ground- and balloon-based QMASK map with the atmosphere-free WMAP map, finding beautiful agreement on all angular scales where both are sensitive. This is a reassuring quantitative assessment of the power of the state-of-the-art FFT- and matrix-based mapmaking techniques that have been used for QMASK and virtually all subsequent experiments.

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