Mapping the CMB III: combined analysis of QMAP flights
Abstract
We present results from the QMAP balloon experiment, which maps the Cosmic Microwave Background (CMB) and probes its angular power spectrum on degree scales. In two separate flights, data were taken in six channels at two frequency bands between 26 to 46 GHz. We describe our method for mapmaking (removal of 1/f-noise and scan-synchronous offsets) and power spectrum estimation, as well as the results of a joint analysis of the data from both flights. This produces a 527 square degree map of the CMB around the North Celestial Pole, allowing a wide variety of systematic cross-checks. The frequency dependence of the fluctuations is consistent with CMB and inconsistent with Galactic foreground emission. The anisotropy is measured in three multipole bands from l~40 to l~200, and the angular power spectrum shows a distinct rise which is consistent with the Saskatoon results.
Keywords
Cite
@article{arxiv.astro-ph/9808045,
title = {Mapping the CMB III: combined analysis of QMAP flights},
author = {Angelica de Oliveira-Costa and Mark Devlin and Tom Herbig and Amber Miller and Barth Netterfield and Lyman Page and Max Tegmark},
journal= {arXiv preprint arXiv:astro-ph/9808045},
year = {2009}
}
Comments
4 pages, with 3 figures included. Submitted to ApJL. Window functions are available at http://pupgg.princeton.edu/~cmb/welcome.html and color figures and links at http://www.sns.ias.edu/~angelica/skymap.html#qmap