Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.8801m&link_type=abstract
American Astronomical Society, 189th AAS Meeting, #88.01; Bulletin of the American Astronomical Society, Vol. 28, p.1390
Astronomy and Astrophysics
Astronomy
Scientific paper
The TopHat experiment will measure CMBR Anisotropy on angular scales from tens of degrees to 20 arcminutes using a balloon-borne, top-mounted, one meter telescope. The experiment is designed to cover a maximum range of spatial scales while minimizing susceptibility to systematic instrument errors. Two versions of the telescope are in development: one, having the traditional sweeping secondary having an three degree total throw and a servoed pointing system (the Pointer), and the second, with a fixed secondary, a constant elevation of 78 degrees and azimuth spin at 4 RPM (the Spinner). The Pointer is optimized for high signal-to-noise measurements of small areas of the sky while the Spinner, designed for LDB flights) maps a 48 degree diameter area centered on the South Celestial Pole. Each telescope is instrumented with a multi-channel bolometric receiver operating from 150 to 700 GHz.
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