Preliminary results on ROSAT observations of the Blazar PKS 0537-441

Details Preliminary results on ROSAT observations of the Blazar PKS 0537-441 Preliminary results on ROSAT observations of the Blazar PKS 0537-441

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992xrea.conf..206t&link_type=abstract

In MPI für Extraterristrische Physik, X Ray Emission from Active Galactic Nuclei and the Cosmic X Ray Background p 206-209 (SEE

Astronomy and Astrophysics

Astronomy

Blazars, Rosat Mission, X Ray Astronomy, X Ray Spectra, Light Curve, Radiant Flux Density, Spectrum Analysis, X Ray Density Measurement

Scientific paper

PKS 0537-447, an object with properties intermediate between BL Lacs and optically violently variable and highly polarized quasars, was observed with Rosat in Apr. 1991. The X-ray flux F(1 keV) = 0.79 +/- 0.05 mu-Jy is higher than those detected by the Einstein observatory (1979-80), and Exosat (1985), while the spectral slope alphaph = 2.1 +/- 0.4 is steeper. The hydrogen column density NH = 3.0 +/- 1.3 times 10 to the 20th power/sq cm is consistent with that deduced from 21 cm observations.

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