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		| Paper: | 
		Search for Extragalactic H2O Maser Toward Active Galaxies | 
	 
	
		| Volume: | 
		476, New Trends in Radio Astronomy in the ALMA Era | 
	 
	
		| Page: | 
		295 | 
	 
	
		| Authors: | 
		Hagiwara, Y.; Doi, A.; Hachisuka, K. | 
	 
	
	
		| Abstract: | 
		We present the results of a search for 22 GHz H2O maser toward the nuclei of active galaxies using the Nobeyama 45-m telescope and Effelsberg 100-m telescope. The primary aim of this search is to detect H2O maser in relatively nearby narrow-line Seyfert 1 galaxies (NLS1s), most of which were
 selected from radio-bright NLS1s detected in the NVSS catalogue. In our single-dish survey, no new H2O maser has been detected at luminosity upper limit of ∼ 5 L☉, implying that strong H2O masers are not associated with the nuclei of NLS1s. | 
	 
	
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