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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

I. Pronik ,
L. Metik  and
N. Merkulova
I. Pronik
Affiliation:
Crimean Astrophysical Observatory, Crimea, Ukraine
L. Metik
Affiliation:
Crimean Astrophysical Observatory, Crimea, Ukraine
N. Merkulova
Affiliation:
Crimean Astrophysical Observatory, Crimea, Ukraine

Extract

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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 

References

Pronik, I., Metik, L., & Merkulova, N. 1997, A&A, 318, 721 Google Scholar