Matthew
Stevenson

My main focus is on the C-Band All-Sky Survey (C-BASS) which plans to map the entire polarized sky at 5 GHz. At this frequency, the Galactic emission is dominated by synchrotron and uncorrupted by Faraday rotation.

This map will be valuable to the cosmological community as a foreground map; it will be used to correct future Cosmic Microwave Background experiments for foreground emission. This then will hopefully allow for the eventual discovery of B-mode polarization anisotropies in the CMB, giving us our first empirical hints constraints on the inflationary period of the early Universe.

I'm also spending a fair bit of time working on the monitoring blazars in support of the GLAST satellite. We are using the 40m telescope in Owens Valley, California, to monitor 1200 blazars every two days at 15GHz.

By correlating the radio variability with the gamma-ray variability measured from GLAST, we hope to constrain the physics of these powerful objects.