SIMBAD references

Light curves and color evolutions of two classical novae can be largely overlapped if we properly squeeze or stretch the timescale of a target nova against that of a template nova by t^′ =t/f_s. Then, the brightness of the target nova is related to the brightness of the template nova by (M[t])_template=(M[t/f_s]-2.5logf_s)_target, where M[t] is the absolute magnitude and a function of time t, and f_s is the ratio of timescales between the target and template novae. In the previous papers of this series, we show that many novae broadly overlap in the time-stretched (B - V)₀-(M_V-2.5logf_s) color-magnitude diagram. In the present paper, we propose two other (U - B)₀-(M_B-2.5logf_s) and (V - I)₀-(M_I-2.5logf_s) diagrams and show that their tracks overlap for 16 and 52 novae, respectively. Here (U - B)₀, (B - V)₀, and (V - I)₀ are the intrinsic U - B, B - V, and V - I colors and not changed by the time stretch, and M_B, M_V, and M_I are the absolute B, V, and I magnitudes. Using these properties, we considerably refine the previous estimates of their distance and reddening. The obtained distances are in reasonable agreement with those of the Gaia Data Release 2 catalog.