(a) Optical light curves of SN 1054 (black circles) and the ECSNe of the SAGB stars. The colors are the same as Figure  4(c). (b) Multicolor light curves of SN 2008S (red: B, green: V, blue: R, magenta: I, cyan: J, yellow: H, and black: K) are compared with those of the ECSN of the SAGB star with M _env = 3.0  M _☉ and X _env(H) = 0.2.