Galactic microwave emission at 19 GHz

We cross-correlate the 19 GHz full sky Cosmic Microwave Background (CMB) survey with other maps to quantify possible foreground contamination. We detect a correlation (5 sigma) with the Diffuse Infrared Background Experiment (DIRBE) 240, 140 and 100 micron maps at high-latitudes (|b|>30 degrees), and a marginal correlation with the Haslam 408 MHz and the Reich & Reich 1420 MHz synchrotron templates. The former agrees well with extrapolations from higher frequencies probed by the Differential Microwave Radiometer (DMR) and Saskatoon experiments and is consistent with either free-free or rotating dust grain emission. The latter provides a useful normalization of high-latitude synchrotron emission at CMB frequencies