|   | 
				
					
	
		  | 
	 
	
		| Paper: | 
		High Precision Millisecond Pulsar Timing with the EPTA | 
	 
	
		| Volume: | 
		424, Proceedings of the 9th International Conference of the Hellenic Astronomical Society | 
	 
	
		| Page: | 
		394 | 
	 
	
		| Authors: | 
		Lazaridis, K. | 
	 
	
	
		| Abstract: | 
		The European Pulsar Timing Array (EPTA) network is a collaboration between the five largest radio telescopes in Europe aiming to study the astrophysics of millisecond pulsars and to detect cosmological gravitational waves in the nano-Hertz regime. The advantages and techniques of handling the multi-telescope datasets of a number of sources will be presented. In addition, the results of the EPTA timing analysis of the pulsar-white dwarf binary PSR J1012+5307 will be reported. Specifically, the measurements for the first time for this system, of the parallax, the variation of the projected semi-major axis and of the orbital period. Finally, the derived stringent, theory independent limits on alternative theories of gravity, with the use of this ideal laboratory for strong-field gravity tests, will be presented. | 
	 
	
		| 
			
			
		 | 
	 
	
		  | 
	 
 
					 
				 | 
				  |