The Gaia-ESO Survey: Calibration strategy

E. Pancino; C. Lardo; G. Altavilla; S. Marinoni; S. Ragaini; G. Cocozza; M. Bellazzini; E. Sabbi; M. Zoccali; P. Donati; U. Heiter; S. E. Koposov; R. Blomme; T. Morel; S. Símon-Díaz; A. Lobel; C. Soubiran; J. Montalban; M. Valentini; A. R. Casey; S. Blanco-Cuaresma; P. Jofré; C. C. Worley; L. Magrini; A. Hourihane; P. François; S. Feltzing; G. Gilmore; S. Randich; M. Asplund; P. Bonifacio; J. E. Drew; R. D. Jeffries; G. Micela; A. Vallenari; E. J. Alfaro; C. Allende Prieto; C. Babusiaux; T. Bensby; A. Bragaglia; E. Flaccomio; N. Hambly; A. J. Korn; A. C. Lanzafame; R. Smiljanic; S. Van Eck; N. A. Walton; A. Bayo; G. Carraro; M. T. Costado; F. Damiani; B. Edvardsson; E. Franciosini; A. Frasca; J. Lewis; L. Monaco; L. Morbidelli; L. Prisinzano; G. G. Sacco; L. Sbordone; S. G. Sousa; S. Zaggia; A. Koch

doi:10.1051/0004-6361/201629450

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Table 6

List of OBA benchmark candidates observed by GES. None were analyzed in any internal release so far.

Star	V	Type	T_eff	log g	Status
	(mag)		(K)	(dex)

HD 93128^a	6.90	O3.5V	49 300	4.10	started
HD 319699^a	9.63	O5V	41 200	3.91	started
HD 163758^a	7.32	O6.5Iafp	34 600	3.28	observed
HD 68450^a	6.44	O9.7II	30 600	3.30	observed
τ Sco^b^c^d^e^f^g	2.81	B0.2V	31 750	4.13	observed
θ Car^c^d	2.76	B0Vp	31 000	4.20	observed
γ Peg^b^c^h	2.84	B2IV	22 350	3.82	observed
HD 56613^c	7.21	B8V	13 000	3.92	observed
134 Tauⁱ	4.87	B9IV	10 850	4.10	observed
68 Tau^j	4.31	A2IV	9 000	4.00	observed

Notes. A few more OBA stars will be observed before the end of the survey. Magnitudes and spectral types are from SIMBAD.

Reference. References for APs:

^(a)

Holgado et al., in prep. (see text);

^(b)

Nieva & Przybilla (2012);

^(c)

Lefever et al. (2010);

^(d)

Hubrig et al. (2008);

^(e)

Simón-Díaz et al. (2006);

^(f)

Mokiem et al. (2005);

^(g)

Martins et al. (2012);

^(h)

Morel & Butler (2008);

⁽ⁱ⁾

Smith & Dworetsky (1993);

^(j)

Burkhart & Coupry (1989).

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