QUaD

QUaD,[1] an acronym for QUEST at DASI, was a ground-based cosmic microwave background (CMB) polarization experiment at the South Pole. QUEST (Q and U Extragalactic Sub-mm Telescope) was the original name attributed to the bolometer detector instrument, while DASI is a famous CMB interferometry experiment credited with the first detection of CMB polarization. QUaD used the existing DASI mechanical infrastructure but replaced the DASI interferometric array with a bolometer detector at the end of a cassegrain optical system. The mount has housed the Keck Array since 2011.

QUaD
A photograph of the QUaD telescope inside its groundshield taken from a crane above the telescope.
Alternative namesQUEST at DASI
Part ofAmundsen–Scott South Pole Station 
Location(s)Antarctic Treaty area
Coordinates90°00′S 139°16′W
Telescope stylecosmic microwave background experiment
radio telescope 
Location of QUaD
Related media on Wikimedia Commons

See also

References
  1. QUaD collaboration (2008). "First season QUaD CMB temperature and polarization power spectra". The Astrophysical Journal. 674 (2008): 22–28. arXiv:0705.2359. Bibcode:2008ApJ...674...22A. doi:10.1086/524922.
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