Optical and Spitzer IR light curves of the Seyfert galaxy NGC6418. A strong flare was observed in this object, which was accompanied by a dramatic increase in the strengths of the broad emission lines ...

Thus, astronomers of the P.K. Sternberg State Astronomical Institute (GAISH) MSU, thanks to X-ray data, discovered a fundamental X-ray difference between Seyfert type I and type II galaxies, as well ...

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NGC 4151 in Canes Venatici is a bright Seyfert galaxy with an active central black hole. It is class SAab. This galaxy has a ...

The galaxy ESO 300-16 looms over this image from the NASA/ESA Hubble Space Telescope. This galaxy, which lies 28.7 million light-years from the earth. NGC 6827 is a Seyfert 1 galaxy located in the ...

At a distance of some 73 million light years away from the Earth, NGC 7582 is a Type 2 Seyfert galaxy with a changing-look AGN. The galaxy has a diameter of about 100,000 light years and a ...