A spectral study of four X-ray-selected BL Lacertae objects with EXOSAT

Details A spectral study of four X-ray-selected BL Lacertae objects with EXOSAT A spectral study of four X-ray-selected BL Lacertae objects with EXOSAT

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408..452s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 408, no. 2, p. 452-459.

Astronomy and Astrophysics

Astrophysics

9

Bl Lacertae Objects, Exosat Satellite, X Ray Spectra, Active Galactic Nuclei, Spectral Energy Distribution, Spectrum Analysis

Scientific paper

We present new EXOSAT spectral results for four X-ray-selected BL Lac objects (H0323+022, H0414+009, H1426+428, and H1722+ 119). The data were retrieved from the EXOSAT data base. A spectral analysis was performed on the overall low-energy plus medium-energy distributions, which were modeled with a single, absorbed power law. In one case (H1426+428), an indication of a spectral break at about 5 keV is found. For H0323+022 and H0414+428, for which more than one observation is available, the spectral index is found to vary with intensity, in the sense of a hardening of the spectrum when the source brightens.

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