Effective (U-B) color
Colors are given essentially in the UBV system. They are :
total asymptotic colors
ubt
for (U-B)T
total asymptotic colors
bvt
for (B-V)T
effective colors
ube
for ((U-B)e (colors within the effective aperture in which half the total B-flux is emitted)
effective colors
bve
for ((B-V)e (same as for ube)
Total assymptotic colors
bvtc
and
ubtc
are corrected for galactic extinction, inclination and redshift effect (see e.g.
btc
documentation)
HyperLeda
Questions:
prugniel@obs.univ-lyon1.fr