Table 5: Galactic P-L relations by different authors. The coefficients a and b are given for a P-L relation of the form $M=a(\log P -1)+b$.
Authors MB MV MI
  a b a b a b
Kraft (1961) -2.25 -3.58 -2.54 -4.21 $\cdots$ $\cdots$
Sandage & Tammann (1968) -2.50 -3.61 -2.76 -4.24 $\cdots$ $\cdots$
Feast & Walker (1987) $\cdots$ $\cdots$ -2.78 -4.24 $\cdots$ $\cdots$
Madore & Freedman (1991) $\cdots$ $\cdots$ -2.76 -4.16 -3.06 -4.87
Gieren et al. (1993) $\cdots$ $\cdots$ -2.99 -4.36 $\cdots$ $\cdots$
Laney & Stobie (1994) $\cdots$ $\cdots$ -2.87 -4.07 $\cdots$ $\cdots$
Feast & Catchpole (1997) $\cdots$ $\cdots$ -2.81 -4.24 $\cdots$ $\cdots$
Gieren et al. (1998) $\cdots$ $\cdots$ -2.77 -4.06 -3.04 -4.77
present paper -2.76 -3.23 -3.14 -3.97 -3.41 -4.73


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