title: Discovery of a high-energy gamma-ray-emitting persistent microquasar
abstract: Microquasars are stellar x-ray binaries that behave as a scaled-down version of extragalactic quasars. The star LS 5039 is a new microquasar system with apparent persistent ejection of relativistic plasma at a 3-kiloparsec distance from the sun. It may also be associated with a gamma-ray source discovered by the Energetic Gamma Ray Experiment Telescope (EGRET) on board the COMPTON-Gamma Ray Observatory satellite. Before the discovery of LS 5039, merely a handful of microquasars had been identified in the Galaxy, and none of them was detected in high-energy gamma-rays.
authors.affiliation: Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Av. Diagonal 647, E-08028 Barcelona, Spain. Departamento de Fisica, Escuela Politecnica Superior, Universidad de Jaen, Calle Virgen de la Cabeza 2, E-23071 Jaen, Spain. Max Planck.
authors.initials: JM
authors.lastname: Paredes
authors.initials: J
authors.lastname: Marti
authors.initials: M
authors.lastname: Ribo
authors.initials: M
authors.lastname: Massi