Construction of a Database of CMB Spectrum Observations

We present the complete set of the measures of the CMB absolute temperature on the basis on the works published in the literature, recognize the main causes of error with the aim of estimating separately the magnitude of the systematic and statistical errors, by focussing in particular on the most recent observations. The main purpose of this work is to create a complete and reasoned database of CMB absolute temperatures. The simple database format permits a reading of the data through any text editor or through programs for data handling. This is the first step for a statistical analysis of CMB spectrum data and their comparison with the theoretical predictions for the distorted spectra in order to derive constraints on physical processes at very high redshifts.