Article contents
Flare in the Hydrogen Line Region of the NGC 3227 Nucleus on January 12–15, 1997
Published online by Cambridge University Press: 25 May 2016
Extract
The nucleus of NGC 3227 was classified as a Sy2 type before 1974, and a Sy1 type after 1974. The Seyfert type of the nucleus changed corresponding to its brightness: U brightness of the nucleus increased in 1974: ΔU ˜ 1m. Maximum brightness of the nucleus was observed in 1975 – 1977.
- Type
- IV. AGN Related Phenomena
- Information
- Symposium - International Astronomical Union , Volume 194: Activity in Galaxies and Related Phenomena , 1999 , pp. 416 - 417
- Copyright
- Copyright © Astronomical Society of the Pacific 1999
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