Absolute UBVRI light curves of SN 2005at, corrected for the derived host galaxy extinction of AV = 1.9 mag, compared to those of SN 2007gr (lines). The light curves of SN 2007gr have been vertically shifted by 0.09 mag for a match. In fact, the comparison yields a good match between the two SNe over all the available wavebands and over the whole time range with obtained data. The of the fit is small, though not unity. It is likely that the systematic differences in the I and U bands dominate the value, reflecting the small intrinsic differences between the SNe. The epoch is set based on the estimated peak of the R-band light curve, similar to Fig. 3.
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