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Results for “BL lacertae objects galaxies-binary galaxies-interacting Markarian 421”

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NASA NTRS1999

Markarian 421's Unusual Satellite Galaxy

We present Hubble Space Telescope (HST) imagery, and ground-based spectroscopy and CCD photometry of the active galaxy Markarian 421 and its companion galaxy 14 arcsec to the ENE.

BL lacertae objects galaxies-binary galaxies-inter↗