Mapping the CMB I: the first flight of the QMAP experiment

Details Mapping the CMB I: the first flight of the QMAP experiment Mapping the CMB I: the first flight of the QMAP experiment

1998-08-06

arxiv.org/abs/astro-ph/9808043v1

Astrophys.J.509:L69-72,1998

Astronomy and Astrophysics

Astrophysics

4 pages, with 5 figures included. Submitted to ApJL. Window functions and color figures are available at http://pupgg.prince

Scientific paper

10.1086/311769

We report on the first flight of the balloon-borne QMAP experiment. The experiment is designed to make a map of the cosmic microwave background anisotropy on angular scales from 0.7 to several degrees. Using the map we determine the angular power spectrum of the anisotropy in multipole bands from l~40 to l~140. The results are consistent with the Saskatoon (SK) measurements. The frequency spectral index (measured at low l) is consistent with that of CMB and inconsistent with either Galactic synchrotron or free-free emission. The instrument, measurement, analysis of the angular power spectrum, and possible systematic errors are discussed.

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