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		| Paper: | 
		Studying the Old Planetary Nebula of V4334 Sgr | 
	 
	
		| Volume: | 
		391, Hydrogen-Deficient Stars | 
	 
	
		| Page: | 
		163 | 
	 
	
		| Authors: | 
		Hajduk, M.; Gesicki, K.; van Hoof, P.A.M.; Lopez, J.A.; Zijlstra, A.A. | 
	 
	
	
		| Abstract: | 
		We study the old planetary nebula around V4334 Sgr using narrow band optical imaging and spectroscopy in the [OIII] 5007Å emission line and radio observations. The obtained model of the nebula yields an age of 8300 yrs, pre-outburst luminosity of log(L/L⊙) = 2.08 and temperature log(T/K) = 4.94. A decrease of the flux by a factor of ≤1.5 at 4.8GHz during the last 11 years cannot be excluded, although this is in contradiction with optical observations. | 
	 
	
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