On 9/15/2025, used this query to choose stars in a narrow range of main sequence
for use as tracers of vertical structure in disk:

  (RA, Dec) = (192.86, 27.13) is direction of NGP
  


select  parallax, phot_g_mean_mag, bp_rp, 
            (phot_g_mean_mag + 5 - 5.0*LOG10(1000.0/parallax)) as abs_mag
      from gaiadr3.gaia_source
      where 
           DISTANCE(192.86, 27.13, ra, dec) < (10000.0/3600.0) and
           (parallax > 1) and (parallax_over_error > 10) and 
           (phot_g_mean_mag < 18.0) and 
           (bp_rp > 0.6) and (bp_rp < 0.8)
 ;