The 0.1-200 keV spectrum of the blazar PKS 2005-489 during an active state

Abstract

The bright BL Lac object PKS 2005-489 was observed by BeppoSAX on November 1-2, 1998, following an active X-ray state detected by RossiXTE. The source, detected between 0.1 and 200 keV, was in a very high state with a continuum well fitted by a steepening spectrum due to synchrotron emission only. Our X-ray spectrum is the flattest ever observed for this source. The different X-ray spectral slopes and fluxes, as measured by various satellites, are consistent with relatively little changes of the peak frequency of the synchrotron emission, always located below 10^{17} Hz. We discuss these results in the framework of synchrotron self-Compton models. We found that for the BeppoSAX observation, the synchrotron peak frequency is between 10^{15} and 2.5x10^{16} Hz, depending on the model assumptions.

arXiv comment7 pages, 4 figures, accepted for publication in A&A

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Cited by in corpus (14)

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• The BL Lac objects OQ 530 and S5 0716+714. Simultaneous observations in the X-rays, radio, optical and TeV bands
• BL Lacertae: complex spectral variability and rapid synchrotron flare detected with BeppoSAX
• PKS 2005-489 at VHE: Four Years of Monitoring with HESS and Simultaneous Multi-wavelength Observations
• X-ray spectral studies of TeV gamma-ray emitting blazars
• Multiband optical polarimetry of BL Lac objects with the Nordic Optical Telescope
• BeppoSAX Observations of 1 Jy BL Lacertae Objects. I
• Simultaneous multi-wavelength campaign on PKS 2005-489 in a high state
• Wide band X-ray and optical observations of the BL Lac object 1ES 1959+650 in high state
• Near-Infrared Observations of BL Lacertae Host Galaxies
• A Search for Intraday Variability in the Blazar PKS 2005-489
• Long-term optical variability of the blazars PKS 2005-489 and PKS 2155-304
• The peculiar variable X-ray spectrum of the active galactic nucleus PKS 2005-489