Power-law (PL) fits on the early part of the pseudo-bolometric light curves of 11 SDSS SNe Ib/c. Here we correct for host extinction. Green solid lines correspond to α = 2, magenta solid lines to α as a free parameter, whose value is reported in each subpanel. Vertical green and magenta lines indicate the inferred explosion date from the PL fit. Blue and red dashed lines indicate the epochs of last non-detection and first detection, respectively. Black dashed-dotted lines indicate the epoch of maximum light. Blue, red, and magenta labels belong to SNe Ib, Ic, and Ic-BL, respectively.