GALACTIC MICROWAVE EMISSION AT DEGREE ANGULAR SCALES

We cross-correlate the Saskatoon Ka- and Q-band cosmic microwave backg round (CMB) data with different maps to quantify possible foreground c ontamination. We detect a marginal correlation (greater than or simila r to 2 sigma with the Diffuse Infrared Background Experiment (DIRBE) 2 40, 140, and 100 mu m maps, but we find no significant correlation wit h point sources, with the Haslam 408 MHz map, or with the Reich and Re ich 1420 MHz map. The rms amplitude of the component correlated with D IRBE is about 20% of the CMB signal. Interpreting this component as fr ee-free emission, this normalization agrees with that of the 1996 work s of Kogut et al. and supports the hypothesis that the spatial correla tion between dust and warm ionized gas observed on large angular scale s persists to smaller angular scales. Subtracting this contribution fr om the CMB data reduces the normalization of the Saskatoon power spect rum by only a few percent.