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		| Paper: | 
		The Gaia-ESO Survey Astrophysical Calibration | 
	 
	
		| Volume: | 
		503, Calibrating Large Surveys and Future Facilities | 
	 
	
		| Page: | 
		275 | 
	 
	
		| Authors: | 
		Pancino, E.; Gaia-ESO Survey consortium | 
	 
	
	
		| Abstract: | 
		The Gaia-ESO Survey is a wide field spectroscopic survey recently started with the FLAMES@VLT in Cerro Paranal, Chile. It will produce radial velocities more accurate than Gaia's for faint stars (down to V ≃ 18), and astrophysical parameters and abundances for approximately 100 000 stars, belonging to all Galactic populations. 300 nights were assigned in 5 years (with the last year subject to approval after a detailed report). In particular, to connect with other ongoing and planned spectroscopic surveys, a detailed calibration program — for the astrophysical parameters derivation — is planned, including well known clusters, Gaia benchmark stars, and special equatorial calibration fields designed for wide field/multifiber spectrographs. | 
	 
	
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