Yongzhong Xu, Max Tegmark, Angelica de Oliveira-Costa
Published 2001-04-26, updated 2002-01-18Version 2
We measure the cosmic microwave background (CMB) power spectrum on angular scales l~30-200 (1-6 degrees) from the QMASK map, which combines the data from the QMAP and Saskatoon experiments. Since the accuracy of recent measurements leftward of the first acoustic peak is limited by sample-variance, the large area of the QMASK map (648 square degrees) allows us to place among the sharpest constraints to date in this range, in good agreement with BOOMERanG and (on the largest scales) COBE/DMR. By band-pass-filtering the QMAP and Saskatoon maps, we are able to spatially compare them scale-by-scale to check for beam- and pointing-related systematic errors.
Comments: Revised to match accepted PRD version. Substantially expanded. Window functions, map and covariance matrix at http://www.hep.upenn.edu/~xuyz/qmask.html
Journal: Phys.Rev.D65:083002,2002
The shape of the CMB power spectrum
The CMB power spectrum out to l=1400 measured by the VSA
Depolarization of the cosmic microwave background by a primordial magnetic field and its effect upon temperature anisotropy
