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

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

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...370..198m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 370, March 20, 1991, p. 198-204.

Astronomy and Astrophysics

Astrophysics

50

Absorption Spectra, Bl Lacertae Objects, X Ray Spectra, Astronomical Spectroscopy, Lyman Alpha Radiation, Proportional Counters

Scientific paper

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 Einstein Objective Grating Spectrometer (OGS) data.

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