Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1085..549k&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
Quasars, Gamma-Ray Sources, Gamma-Ray Bursts, X- And Gamma-Ray Telescopes And Instrumentation
Scientific paper
VHE gamma-ray emission was discovered from the high-frequency-peaked BL Lac object RGB J0152+017 in November 2007. The instantaneously triggered multiwavelength observations with the X-ray satellites Swift and RXTE, the optical telescope ATOM and the radio telescope Nancay provided the first simultaneous SED for RGB J0152+017. While these and further observations with H.E.S.S. gives no indication for variability, the follow-up observations until January 2008 with Swift (X-ray and UV-optical telescope) and ATOM (optical) show flux variations on time scales of ~10 days with different variability patterns. This non-monotonically flux variation of the simultaneous multiwavelength observations lead to the conclusion that the shape of the synchrotron spectrum changes.
Gérard Léonard
Giebels Berrie
Hauser Marcus
Herzog Juergen
Kaufmann Sarah
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