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Table 2

Summary of rejections from the APOGEE DR17 data set.

Reasons for rejection
Duplicate APOGEE entry 76 461

log g not in range 285 312
Teff not in range 166013
More than 4 kpc from Sun 36682
STAR_BAD flag(s) set 35 151
Poor S/N 18 939
Probable Red Clump star 17 173
Within 4.0 kpc of Galactic centre 16 381
More than 2.0 kpc above/below Galactic plane 9169
Known GC member 6012
Possible AGB/YSO/PNe (IR excess method) 4243
Inaccurate distance 1457
log g vs. Teff forbidden zone 962
Too far from Galactic centre (>25.0 kpc) 684
Possible AGB in ASAS-SN variables 202
Member of LMC/SMC/Fnx/Sgr dwarfs 109
[C/Fe] abundances invalid or unusable 70
[Mg/Fe] abundances invalid or unusable 19
[C/Fe] abundance uncertainty ≥0.05 dex 10
In AGB Star Catalogue 9

Total rejections 675 058
Stars in DR17 733 900
Stars in sample 58 842

Low α stars 39 175
Early high α stars 11 860
Late high α stars 5632
Buffer zone stars 2175

Notes. The final sample of 58 842 stars was used in the remainder of this paper. Also shown is a breakdown by the three populations used herein.

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