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A ubiquitous absorption feature in the X-ray spectra of BL Lacertae objectsThe 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.
Document ID
19910042444
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1086/169805
Authors
Madejski, Greg M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mushotzky, Richard F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Weaver, Kimberly A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Arnaud, Keith A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Urry, C. Megan (Space Telescope Science Institute Baltimore, MD, United States)
Date Acquired
August 14, 2013
Publication Date
March 20, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 370
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A27067
Funding Number(s)
CONTRACT_GRANT: NAS5-30442
Distribution Limits
Public
Copyright
Other

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