Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21914905v&link_type=abstract
American Astronomical Society, AAS Meeting #219, #149.05
Astronomy and Astrophysics
Astronomy
Scientific paper
The TeV detection of LS I+61°303, LS 5039, PSR B1259-63 and HESS J0632+057 has confirmed x-ray binaries (XRB) as a new class of very-high-energy gamma-ray sources. XRB that possess stellar-mass black holes and collimated relativistic outflows are referred to as microquasars. Cygnus X-1 fits well the definition of microquasar. Based on their similarities to AGN, which account for a large population of GeV/TeV sources, microquasars constitute a potential class of gamma-ray emitters. Just as in AGN, jets are the most likely sites for particle acceleration and gamma-ray production in microquasars. We present the results of the simultaneous observations of Cygnus X-1, within the context of the latest multi-wavelength campaign, with specific focus on the VERITAS (TeV) and Fermi (GeV) results.
VERITAS research is supported by grants from the U.S. Department of Energy, the U.S. National Science Foundation and the Smithsonian Institution, by NSERC in Canada, by Science Foundation Ireland and by STFC in the UK.
Varlotta Angelo
VERITAS Collaboration
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