In this paper , we make a comprehensive determination of the Hubble constant H _ { 0 } by using two parameters—the B - V color and the rate of decline \Delta m _ { 15 } —to simultaneously standardize the luminosities of all nearby Cepheid-calibrated type Ia supernovae ( SNe Ia ) and those of a larger , more distant sample of 29 SNe Ia .
Each group is treated in as similar a manner as possible in order to avoid systematic effects .
A simultaneous \chi ^ { 2 } minimization yields a standardized absolute luminosity of the Cepheid-calibrated supernovae as well as the Hubble constant obtained from the more distant sample .
We find H _ { 0 } = 62 km s ^ { -1 } Mpc ^ { -1 } and a standardized absolute magnitude of -19.46 .
The sensitivity of H _ { 0 } to a metallicity dependence of the Cepheid-determined distances is investigated .
The total uncertainty \delta H _ { 0 } , dominated by uncertainties in the primary Cepheid distance indicator , is estimated to be 5 km s ^ { -1 } Mpc ^ { -1 } .