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		| Paper: | 
		Time Delays in NGC 4151 | 
	 
	
		| Volume: | 
		290, Active Galactic Nuclei: from Central Engine to Host Galaxy | 
	 
	
		| Page: | 
		119 | 
	 
	
		| Authors: | 
		Oknyanskij, V. L.; Horne, K.; Lyuty, V. M.; Sadakane, K.; Honda, S.; Tanabe, S. | 
	 
	
	
		| Abstract: | 
		Photometric UBVRI monitoring of NGC 4151 are used to measure wavelength-dependent time delays and variability amplitudes. The time delay increases with wavelength. In a blackbody reprocessing model, this implies temperatures decreasing with radius. | 
	 
	
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