Table 7: The sensitivity of the P-L slope from the Tables 3 and 4 data to assumptions on reddening and broad-band effects ("Corr'' refers to  ${E(B-V)_{{\rm corr}}}$ from Eq. (2); "FS'' refers to the ${E(B-V)_{{\rm FS}}}$ in the Fernie system).
E(B-V) $\alpha$ slope E(B-V) $\alpha$ slope
(1) (2) (3) (4) (5) (6)
    B -2.750     B -2.758
Corr 0.44 V -3.137 FS 0.44 V -3.142
    I -3.408     I -3.410
    B -2.710     B -2.716
Corr 0.25 V -3.096 FS 0.25 V -3.100
    I -3.368     I -3.369
    B -2.657     B -2.661
Corr 0.00 V -3.043 FS 0.00 V -3.045
    I -3.315     I -3.314


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