Spectroscopic and Photometric Observations of SN IIn 1995N and Energy Estimates

We present the results of a long-term program of monitoring of the famous SN 1995N, observed both in photometry (uvrijhk bands) and optical spectroscopy. The observations span a period of about 9 years. These new data, together with others available in literature, extend from the X-ray wavelengths to the radio, and allow to estimate the total energy radiated by the supernova over a decade after its explosion.