THE TENERIFE CMB EXPERIMENTS - 2-DIMENSIONAL MAPS

We present results on the mapping of the declination band + 35 degrees .0 to + 42 degrees.5, as carried out with the Tenerife CMB anisotropy experiments since 1984. Our observations cover about 3500 square degre es, obtained by overlapping adjacent scans at constant declination. Th e best sensitivities are close to 60 mu K and 25 mu K standard error p er beam area at 10.4 GHz and 14.9 GHz respectively. Preliminary maps a t these two frequencies are presented. We briefly discuss the presence of discrete radio sources and the possible effects of diffuse Galacti c emission. After point source subtraction a likelihood analysis of th e high galactic latitude region in our 10.4 GHz map imposes upper limi ts to intrinsic sky signals of order 80 mu K. A similar analysis of th e same region in the 14.9 GHz map suggests the presence of structure w ith an rms sky signal in the range 30-50 mu K which may be due to intr insic CMB fluctuations.