NGC 7679: an anomalous, composite Seyfert 1 galaxy whoseX-ray luminous AGN vanishes at optical wavelengths

E-ISSN： 1432-0746|447|2|441-451

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.447, Iss.2, 2006-02, pp. : 441-451

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