A ubiquitous absorption feature in the X-ray spectra of BL Lacertae objects

@inproceedings{Madejski1991AUA,
  title={A ubiquitous absorption feature in the X-ray spectra of BL Lacertae objects},
  author={Greg M. Madejski and Richard Fred Mushotzky and Kimberly Weaver and Keith A. Arnaud and Claudia Megan Urry},
  year={1991}
}
The paper presents the broadband (0.5-20-keV) X-ray spectra of five X-ray bright BL Lac objects observed with the Einstein Observatory Solid State Spectrometer (SSS) and Monitor Proportional Counter (MPC) detectors. The combination of moderate energy resolution and broad spectral coverage makes it possible to confirm the presence of an absorption feature at an energy of 650 eV in the BL Lac object PKS 2155-304, originally reported by Canizares and Kruper (1984) based on higher resolution… CONTINUE READING

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