UCSB SOUTH-POLE 1994 COSMIC MICROWAVE BACKGROUND ANISOTROPY MEASUREMENT CONSTRAINTS ON OPEN AND FLAT-LAMBDA COLD DARK-MATTER COSMOGONIES

We develop methods to account for experimental and observational uncer tainties in likelihood analyses of data from cosmic microwave backgrou nd (CMB) anisotropy experiments and apply them to an analysis of the U CSB South Pole 1994 (SP94) experiment. Observationally motivated open and spatially hat A, cold dark matter cosmogonies are considered. Amon g the models we consider, the full SP94 data set is most consistent wi th Ohm(0) similar to 0.1-0.2 open models and less so with old (t(0) gr eater than or similar to 2 15-16 Gyr), high baryon density (Ohm(B) gre ater than or similar to 0.0175 h(-2)), low density (Ohm(0) similar to 0.2-0.4), flat-Lambda models. The SP94 data do not rule out any of the models we consider at the 2 sigma level. The SP94 experiment is most sensitive to anisotropies on a somewhat larger, model-dependent, angul ar scale than the scale at which the window function peaks. For establ ishing the significance of a detection of CMB anisotropy we derive lim its using the highest posterior density (HPD) prescription, since it y ields smaller lower limits. Since HPD limits lead to tighter constrain ts on the CMB amplitude, they also provide for greater discrimination between models. Model normalizations deduced from the SP94 data subset s are mostly consistent with those deduced from the 2 yr COBE-DMR data , although the Ka-band data prefer a normalization similar to 1 sigma lower than do the Q-band data, the Q and Ka + Q data favor a slightly higher normalization for the Ohm(0) = 0.1 open model than does the DMR , and the Ka and Ka + Q data prefer a somewhat lower normalization for the older, higher Ohm(B), low-density A models than does the DMR.