Speaker
Description
The Canadian Galactic Emission Mapper (CGEM) is a 4-meter on-axis radio
telescope located at the Dominion Radio Astrophysical Observatory in
British Columbia, Canada. It is currently mapping the northern sky in
intensity and polarization with 0.5-degree angular resolution to
characterize galactic synchrotron emission. While B-mode searches are
typically conducted around 100 GHz, CGEM observes at 8-10 GHz. At these
lower frequencies, synchrotron radiation dominates the polarized
emission and is much brighter than at CMB observing frequencies. By
observing at these frequencies, CGEM will isolate and map synchrotron
emission and other galactic emissions such as spinning dust, producing
templates that will be extrapolated to higher frequencies. Eventually,
these templates will be used to remove the effects of synchrotron
contamination from CMB data. This presentation will highlight a brief
overview of the instrument with regard to the antenna, feed and analog
radiometer, its design and operation point. It will draw attention to
the digital back-end, its features and the role of CASPER in it.
Finally, This presentation will provide some motivation on RFI
environment and some strategies for RFI excision.
