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		| Paper: | 
		The IRAF/NOAO Spectral World Coordinate Systems | 
	 
	
		| Volume: | 
		52, Astronomical Data Analysis Software and Systems II | 
	 
	
		| Page: | 
		467 | 
	 
	
		| Authors: | 
		Valdes, Francisco | 
	 
	
	
		| Abstract: | 
		The IRAF (Version 2.10) world coordinate systems for dispersion calibrated spectra are presented. In particular the FITS keywords describing the coordinates are defined. | 
	 
	
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