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 acti ve galactic nuclei (AGN) harboring accreting supermassive black hole. Simil ar type superluminal jets were detected in some of the hard X-ray transient s with a stellar mass black hole. Galactic black-hole X-ray binaries with r elativistic jets are reminiscent, though on a much smaller scale, of many o f the phenomena seen in AGNs. The contemporaneous multiwavelength observati ons of the superluminal sources reveal the close connection between instabi lities obviously originated in the accretion disk and manifested by their s hort timescale signature in X-rays, and the ejection of clouds of relativis tic 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 rid to stress out the importance of the multiwave length observations.