

This experiment is a ground-based telescope located in Saskatoon,
Canada. A cooled HEMT receiver with six channels is used to span
the frequency range 26 to 46 GHz. The chopping strategy is
quite complex, and can be used to synthesise `window functions'
appropriate to a range of angular scales. The beam sizes used
range from
at the lowest frequency to
at the highest. The analysis of observations of a 24 hour RA
strip at declination
is described in Wollack
et al.
(1993) [99] and Netterfield
et al.
(1995) [76], indicating a detection of primordial anisotropy. More recently
in Netterfield
et al.
(1997) [75], exciting results have been presented which show not just a
detection, but for the first time for a switched-beam instrument,
evidence for the form of the power spectrum itself on the angular
scales probed. The final map after 3 years of data from this
experiment is shown in Figure
13
Figure 13:
Saskatoon 3 year map showing region analysed as compared to
the COBE full sky coverage.
and the power spectrum from this map will be used below, in
comparison with theoretical predictions. We note here that there
is currently an overall scaling uncertainty in the Saskatoon
results of
%, due to calibration uncertainties. Recent analysis of the
Saskatoon data (Knox, in prep.) appear to show that the previous
calibration is an underestimate of the true level of the
Saskatoon data. This would make the Doppler peak even higher and
lower the value of
found below.


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The Cosmic Microwave Background
Aled W. Jones and Anthony N. Lasenby
http://www.livingreviews.org/lrr-1998-11
© Max-Planck-Gesellschaft. ISSN 1433-8351
Problems/Comments to
livrev@aei-potsdam.mpg.de
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