Galactic superluminal sources at different wavelengths

Jet-like superluminal motion was observed in few types of the astrophysical systems. The early observations were made from radio galaxies with an active galactic nuclei (AGN) harboring accreting supermassive black hole. Similar type superluminal jets were detected in some of the hard X-ray transients with a stellar mass black hole. Galactic black-hole X-ray binaries with relativistic jets are reminiscent, though on a much smaller scale, of many of the phenomena seen in AGNs. The contemporaneous multiwavelength observations of the superluminal sources reveal the close connection between instabilities obviously originated in the accretion disk and manifested by their short timescale signature in X-rays, and the ejection of clouds of relativistic plasma observed as synchrotron emission at longer wavelengths. In this review I will attempt to summarise the observational status of the galactic relativistic jet sources and to stress out the importance of the multiwavelength observations