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Gaia EDR3 is available in CDS gaia at esa
  
J/A+A/602/A69
  Group sunspot number series since 1739 (Chatzistergos+, 2017)
  
    J/A+A/602/A69/ch_gsn_yGSN series, annual values [timeSerie](Annually averaged number of sunspot groups) (272 rows)
    J/A+A/602/A69/ch_gsn_mGSN series, monthly values (3264 rows)
    J/A+A/602/A69/ch_gsn_dGSN series, daily values (101184 rows)

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