Effective collision strengths for C II

The effective collision strengths have been calculated using the R-matrix method. Each fine-structure level is assigned an index number in Table 1 of the manuscript ranging from 1 to 30.

These index values are used here in Table 2 to refer to particular transitions, eg. Index 2-8 denotes the transition 2s^2^2p 2PO(J=3/2) - 2s2p^2^ 3SE(J=1/2). The effective collision strengths for each transition are presented in rows for a number of electron temperatures ranging from log10(T)=3.00 to log10(T)=5.50.