Abstract
We have observed the Corona Borealis Supercluster with the Millimeter and Infrared Testa grigia Observatory (MITO) at 143, 214, 272, and 353 GHz. We present a description of the measurements, data analysis, and results together with a comparison of observations performed at 33 GHz with the Very Small Array (VSA). Observations have been made in a region of the supercluster corresponding to one Cosmic Microwave Background (CMB) cold spot previously detected in VSA temperature map. Observational strategy and data analysis are described, explaining the procedures used to disentangle primary and secondary anisotropies in the resulting maps. With a data analysis using map making and the maximum entropy method we claim a weak detection of a faint signal spectrally compatible with a SZ effect characterized at most by a Comptonization parameter y = (7.8 +5.3 4.4 )× 10 6 68% CL. The low level of confidence in the presence of a SZ signal invites us to study this sky region with higher sensitiv ity and angular resolution experiments like the already planned upgraded versions of VSA and MITO.
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