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		| Paper: | 
		The O - C Diagram: Basic Procedures | 
	 
	
		| Volume: | 
		335, The Light-Time Effect in Astrophysics:  Causes and Cures of the O - C diagram | 
	 
	
		| Page: | 
		3 | 
	 
	
		| Authors: | 
		Sterken, C. | 
	 
	
	
		| Abstract: | 
		This paper outlines some basic principles of the O – C method applied when discussing periodic phenomena. Difficulties in the application of the technique are illustrated, and misunderstandings in the interpretation of the O – C diagram are addressed. | 
	 
	
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