  In this paper, we study the rare radiative processes $B_c\to D_{sJ}
^{(*)}\gamma$ within the Standard Model, where $D_{sJ}^{(*)}$ stands for the
meson $D_s^*$,~$D_{s1}(2460,2536)$ or ~$D_{s2}^*(2573)$. During the
investigations, we consider the contributions from the penguin, annihilation,
color-suppressed and color-favored cascade diagrams. Our results show that: 1)
the penguin and annihilation contributions are dominant in the branching
fractions; 2) for the processes $B_c\to D_s^{*}\gamma$ and $B_c\to
D_{s1}(2460,2536)\gamma$, the effects from the color-suppressed and
color-favored cascade diagrams are un-negligible.
