On the Correlation of Near Infrared and Optical Variability in NGC 4151

Details On the Correlation of Near Infrared and Optical Variability in NGC 4151 On the Correlation of Near Infrared and Optical Variability in NGC 4151

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..360...75o&link_type=abstract

AGN Variability from X-Rays to Radio Waves ASP Conference Series, Vol. 360, Proceedings of the conference held 14-16 June, 2004

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We combine all published NIR and optical photometric observations of NGC 4151 with our new yet unpublished data to determine the time delays between optical and NIR variations. Previously we have found changes in the time delay value for variations in the K and L filters for different states of the luminosity. Here we consider new data obtained during a deep minimum after a very high state of the nucleus. We conclude that dust recovery time after the high state is more than several years.

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