Comments on the Comparison of the COBE DMR and Tenerife Data

We have compared the Tenerife data with the COBEDifferential Microwave Radiometer (DMR) 2 year data in the declination+40 region of the sky observed by the Tenerife experiment. Using theGalactic plane signal at 30 GHz, we show that the two data sets arecross-calibrated to within 5 percent. The high Galactic latitude datawere investigated for the presence of common structures with theproperties of cosmic microwave background (CMB) fluctuations. The mostprominent feature in the Tenerife data (AT 80 muK) appears to be presentin both the 53 and 90 GHz DMR maps and has the Planckian spectrumexpected for CMB anisotropy. The cross-correlation function of theTenerife and DMR scans is indicative of common structure and at zero laghas the value C(0)112=34+1153 muK. The combination of the spatial andspectral information from the two data sets is consistent with thepresence of cosmic microwave background anisotropies common to both. Theprobability that noise could produce the observed agreement is less than5 percent.