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Table 1

FLAMES instrumental setups used in the Gaia-ESO Survey, with the number of individual stars analyzed in iDR4 for each setup.

Instrument Setup λmin λmax R iDR4
(Å) (Å) (λ/ Δλ)

UVES 520ad 4140 6210 47 000 337
UVES 580bd 4760 6840 47 000 3281
UVES 860c 6600 10 600 47 000
GIRAFFE HR3ad 4033 4201 24 800 822
GIRAFFE HR4ae 4188 4297 24 000
GIRAFFE HR5Aad 4340 4587 18 470 823
GIRAFFE HR6ad 4538 4759 20 350 806
GIRAFFE HR9Bd 5143 5356 25 900 2243
GIRAFFE HR10f 5339 5619 19 800 29 215
GIRAFFE HR14Aad 6308 6701 17 740 683
GIRAFFE HR15Nd 6470 6790 17 000 19 431
GIRAFFE HR21f 8484 9001 16 200 31 649

Notes. The official ESO setup data presented here refer to the period covered by GES iDR4 observations, i.e., before August 2014.

(a)

Mostly used for OBA stars (WG13).

(b)

Mostly used for FGK stars (WG10, WG11, WG12).

(c)

Used for benchmark stars (legacy value only, no analysis).

(d)

Used for OCs; HR09B is generally used for stars of type A. and hotter, while HR15N is used for stars of type F and cooler.

(e)

Not in iDR4, introduced only recently.

(f)

Used for MW field stars.

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