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Table B.4.

Zero-points and additional uncertainties from Gaia eDR3 systematics.

Galaxy μα, *, QSO μδ, QSO error Dominant source
[mas yr−1] [mas yr−1] [mas yr−1]
AntliaII 0.004 0.001 0.013 PM
AquariusII -0.015 -0.010 0.021 PM-stat
BootesI -0.021 0.011 0.019 dm
BootesII -0.017 0.011 0.021 dm
BootesIII -0.023 0.010 0.016 dm
BootesIV -0.007 -0.007 0.020 PM-stat
CanesVenaticiI 0.005 0.001 0.020 PM-stat
CanesVenaticiII 0.015 -0.009 0.022 PM-stat
Carina -0.010 0.004 0.019 dm
CarinaII 0.004 -0.007 0.020 dm
CarinaIII 0.001 -0.006 0.022 dm
CentaurusI 0.001 -0.006 0.021 PM-stat
CetusII -0.033 -0.009 0.021 dm
CetusIII -0.007 -0.020 0.022 PM-stat
ColumbaI -0.001 -0.014 0.021 PM-stat
ComaBerenices 0.001 -0.017 0.020 dm
CraterI 0.012 -0.003 0.022 PM-stat
CraterII 0.026 -0.003 0.016 PM-stat/syst
Delve1 0.001 -0.013 0.022 dm
Delve2 -0.002 -0.004 0.022 PM-stat
DESJ0225+0304 -0.017 -0.025 0.022 PM-stat
Draco 0.007 0.001 0.019 PM-syst
DracoII 0.001 0.001 0.021 PM-stat
EridanusII -0.003 -0.004 0.021 PM-stat
EridanusIII -0.008 -0.006 0.022 PM-stat
Fornax -0.004 -0.007 0.017 dm
GrusI -0.004 0.004 0.021 PM-stat
GrusII -0.001 0.012 0.020 dm
Hercules 0.020 -0.010 0.021 PM-stat
HorologiumI 0.000 -0.008 0.022 dm
HorologiumII 0.002 -0.008 0.022 PM-stat
HydraII 0.009 0.010 0.022 PM-stat
HydrusI 0.003 0.000 0.020 dm
IndusI 0.002 0.018 0.022 PM-stat
IndusII -0.004 0.003 0.021 PM-stat
LeoI -0.002 0.005 0.021 PM-syst
LeoII 0.010 -0.014 0.021 PM-stat
LeoIV -0.001 -0.021 0.022 PM-stat
LeoV 0.000 -0.021 0.022 PM-stat
LeoT 0.005 0.008 0.022 PM-stat
PegasusIII -0.021 -0.008 0.023 PM-stat
Phoenix -0.010 -0.008 0.021 PM-stat
PhoenixII -0.013 0.002 0.022 dm
PictorI -0.004 0.004 0.022 PM-stat
PictorII 0.001 -0.005 0.021 dm
PiscesII -0.012 -0.002 0.022 PM-stat
ReticulumII 0.002 -0.005 0.02 dm
ReticulumIII 0.008 -0.003 0.021 PM-stat
SagittariusII 0.000 0.000 0.022 dm
Sculptor -0.001 -0.012 0.019 PM-syst
Segue1 0.001 0.013 0.021 dm
Segue2 0.001 -0.014 0.022 dm
Sextans -0.025 0.011 0.018 PM/dm-syst
TriangulumII 0.016 -0.021 0.022 PM-syst
TucanaII -0.013 0.004 0.019 dm
TucanaIII -0.011 0.005 0.020 dm
TucanaIV -0.013 0.005 0.019 dm
TucanaV -0.010 0.010 0.021 dm
UrsaMajorI 0.005 -0.006 0.020 PM/dm-stat
UrsaMajorII 0.009 -0.007 0.019 dm
UrsaMinor -0.001 0.005 0.018 PM-syst
VirgoI -0.006 -0.007 0.022 PM-stat
Willman1 0.003 -0.007 0.021 dm
LeoA 0.016 0.005 0.021 PM-stat
IC1613 -0.003 -0.003 0.020 PM-syst
NGC6822 -0.008 -0.016 0.020 PM-syst
Peg-dIrr 0.000 -0.001 0.021 PM-stat
WLM -0.003 0.003 0.021 PM-stat
Sg-dIrr -0.001 0.002 0.023 PM-stat
UGC4879 0.016 -0.012 0.022 PM-stat
NGC3109 0.004 -0.012 0.022 PM-stat
SextansA -0.021 0.006 0.022 PM-stat
M33 0.015 0.003 0.019 PM-syst
SextansB -0.012 0.011 0.022 PM-stat

Notes. μα, *, QSO (Col. 1) and μδ, QSO (Col. 2) are the weighted average of the PMs of QSO within 7deg from the galaxy’s centre, and ’error’ (Col. 3) is the additional uncertainty per proper motion component. Col. 4 indicates whether the uncertainties in the distance modulus (dm) or in the systemic PM (PM) are the dominant source of error; for the latter we consider both statistical and systematic uncertainties; ’stat’ or ’syst’ indicate whether statistical or systematic errors dominate PM uncertainties. For Crater II in one dimension the statistical error is larger than the systematic one and vice-versa.

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