Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1085..245n&link_type=abstract
HIGH ENERGY GAMMA-RAY ASTRONOMY: Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy. AIP Conferenc
Astronomy and Astrophysics
Astronomy
1
Gamma-Ray, Galactic Nuclei, Circumnuclear Matter, And Bulges, Quasars
Scientific paper
A number of microquasars exhibit parsec-scale jets, which in some cases are known to interact with the interstellar medium (ISM). A famous example is the SS-433 system. Here, we summarise H.E.S.S. observations of three further examples in this category with arc-minute scale jets and/or jet/ISM interaction features. The small line-of-sight angle in the Cir X-1 jet makes this source a potential `microblazar'. An arc-minute bow-shock radio feature has been blown out by the Cyg X-1 jet, and the MAGIC telescope has also detected a VHE flare on 24 Sept. 2006 from Cyg X-1 (H.E.S.S. obs. were taken ~1 month earlier). Persistent bi-lobal (~7 arcmin long) `fossil' jets of 4U1755-33 have been seen in X-rays. This report summarises our observations, searching for pointlike VHE emission at the central sources and for extended emission from their jets and/or jet/ISM interaction regions.
Nicholas Brent
Rowell Gavin
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