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719 galaxies within 50 megaparsecs were surveyed using Chandra X-ray Observatory data as of March 2016. The survey identified 314 X-ray active galactic nuclei, with a typical photon index of around 1.8. This table was created by the HEASARC in September 2017 based on catalog files from the CDS.
License is listed as 'other-license-specified'; specific terms should be reviewed. File formats include BIN and HTML.