NGC 454: unveiling a new ‘changing look’ active galactic nucleus

Author: Marchese E.   Braito V.   Della Ceca R.   Caccianiga A.   Severgnini P.  

Publisher: Oxford University Press

ISSN: 0035-8711

Source: Monthly Notices of the Royal Astronomical Society, Vol.421, Iss.2, 2012-04, pp. : 1803-1812

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