Astronomical transients are among the most interesting and spectacular phenomena in the universe, which, moreover, because of their vigor and energy yield, reveal to us an extraordinary amount about its nature, at least in the broader vicinity of the observed event. These phenomena include, in particular (mostly in the deep sky), classical novae, supernovae (SNe), kilonovae (KNe), gamma-ray bursts (GRB), tidal disruption events (TDE), etc. The thesis will identify and evaluate these events using the current state-of-the-art observational data, focusing on the potential observations of such phenomena using the upcoming QUVIK satellite.