2000ApJ...529...47G

The results of the Tenerife cosmic microwave background (CMB) experiments are presented. These observations cover 5000 and 6500 deg² on the sky at 10 and 15 GHz, respectively, centered on decl.~+35°. The experiments are sensitive to multipoles l=10-30 that correspond to the Sachs-Wolfe plateau of the CMB power spectra. The sensitivity values of the data are ∼31 and ∼12 µK at 10 and 15 GHz, respectively, in a beam-size region (5°x5°). The data at 15 GHz show clear detection of structure at high Galactic latitude; the results at 10 GHz are compatible with these, but at lower significance. A likelihood analysis of the 10 and 15 GHz data at high Galactic latitude, assuming a flat CMB band power spectrum, gives a signal ΔT_ℓ=30⁺¹⁰_–8 µK (68% C.L.). Including the possible contaminating effect due to the diffuse Galactic component, the CMB signal is ΔT_ℓ=30⁺¹⁵_–11 µK. These values are stable against the Galactic cut chosen. Assuming a Harrison-Zeldovich spectrum for the primordial fluctuations, the above values imply an expected quadrupole Q_rms–ps=20⁺¹⁰_–7 µK, which agrees with previous results from these experiments, and which are compatible with the COBE DMR data in the case of the standard inflationary cold dark matter models.