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NGC 4151: An Accurate Upper Limit to the Dimensions of the Central Continuum Source?
Published online by Cambridge University Press: 19 July 2016
Abstract
Simultaneous (5672 Å and 3400–3900 Å)) optical continuum photometric observations of the Seyfert galaxy NGC4151, were carried out within ≤4 week periods, down to a time resolution of < 1hr. A new active phase (1990) is detected with onset and slope captured in 1989. Implications of the variability record from 1983, to 1990 (Fig-1), are discussed.
- Type
- Poster Contributions: Variability
- Information
- Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 405 - 406
- Copyright
- Copyright © Kluwer 1994