Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.8803s&link_type=abstract
American Astronomical Society, 189th AAS Meeting, #88.03; Bulletin of the American Astronomical Society, Vol. 28, p.1390
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Since 1988 the UCSB Cosmology Group has performed a number of measurements of the degree scale structure in the Cosmic Background Radiation. These include 3 South Pole expeditions in 1989, 91 and 94. and 8 balloon flights using SIS, HEMTs and bolometer based detectors. We will present a summary of these measurements focusing onthe recent results. In addition, we will describe the recent flight of HACME, a balloon- borne experiment to map CMB anisotropies with 0.75 degree angular resolution over several hundred square degrees. This experiment is a prototype for our next generation CMB experiment, the Background Emission Anisotropy Scanning Telescope (BEAST). BEAST will feature a 2 m diameter carbon fiber composite primary mirror for high angular resolution and a sensitive array of ultra-low noise HEMT amplifiers at 30, 40, and 90 GHz. BEAST is designed for an Antarctic long duration balloon flight allowing an observing time of order two weeks. This experiment will provide an unprecedented combination of sensitivty and angular resolution across a significant region of sky.
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