Hard X ray observations of active galactic nuclei with SIGMA

Details Hard X ray observations of active galactic nuclei with SIGMA Hard X ray observations of active galactic nuclei with SIGMA

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992xrea.conf...50b&link_type=abstract

In MPI für Extraterrestrische Physik, X Ray Emission from Active Galactic Nuclei and the Cosmic X Ray Background p 50-53 (SEE N9

Astronomy and Astrophysics

Astronomy

Active Galactic Nuclei, Radiant Flux Density, X Ray Astronomy, X Ray Telescopes, Brightness, Centaurus Constellation, Seyfert Galaxies, Spectrum Analysis, Variations, X Ray Sources

Scientific paper

Variations of the sources observed with the French Sigma telescope are
reported including data obtained in June and July 1991. At the
sensitivity level for single sessions, only strong variations could be
clearly detected. Flux variations of Cen A, NGC 4151 and of 3C 273
observed by Sigma are presented.

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