Variable very-high-energy gamma-ray emission from the microquasar LS I+ 61 303
Journal
Science 312, 1771--1773, 2006
ticlealbert2006variable, title=Variable very-high-energy gamma-ray emission from the microquasar LS I+ 61 303, author=Albert, Jordi and Aliu, E and Anderhub, H and Antoranz, P and Armada, A and Asensio, M and Baixeras, C and Barrio, JA and Bartelt, M and
Abstract:
Microquasars are binary star systems with relativistic radio-emitting jets. They are potential sources of cosmic rays and laboratories for elucidating the physics of relativistic jets. Here we report the detection of variable gamma-ray emission above 100 gigaelectron volts from the microquasar LS I +61 303. Six orbital cycles were recorded. Several detections occur at a similar orbital phase, suggesting the emission is periodic. The strongest gamma-ray emission is not observed when the two stars are closest to one another, implying a strong orbital modulation of the emission or the absorption processes.