CARA Science: DASI
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The Degree Angular Scale Interferometer (DASI) is an ambitious
13-element interferometric array designed to obtain highly sensitive
and detailed images of
CMB anisotropy and to determine its angular
power spectrum (Halverson 1998).
The unique imaging capabilities of DASI and its
angular coverage (140 < l < 910) complement the Viper telescope,
especially its future mm and submm capabilities to be provided by
well as the MAP satellite and other CMB experiments. DASI was
successfully tested at Chicago this summer
(see Figure 6) and passed
a 'readiness review'
conducted by three external scientists. It is now being shipped
to the South Pole. The synergy of the DASI project with the
Cosmic Background Imager (CBI) built at Caltech for imaging much
higher angular scale CMB anisotropy at much higher angular scale
(700 < l < 3600) allowed the DASI team to keep to its ambitious
schedule. All components are built and tested including the telescope
control, data acquisition, and data reduction software.
The first science observations with DASI are expected
by the end of the 1999-2000
austral summer. DASI will operate throughout the
Since the telescope is still under construction, there are no
scientific results available. However,
is a paper on line (gzipped postscript) summarizing DASI's plans and
progress as of mid-1998.
For more information
The group has a website at
DASI is based at the University of Chicago.
For more information, contact John Carlstrom,
Mark Dragovan, email@example.com.