supplementary material to Winnewisser et al., "The Rotational Spectrum of OCCCS Revisited" a: instructions For the main isotopomer of OCCCS, the file "OCCCS.dat" contains all presently assigned rotational transitions and rovibrational transitions within the band system of the lowest-lying bending mode. In the first eight columns, the vibrational quantum numbers (v5,v6,v7), the quantum number of the vibrational angular momentum (absolute value), the rotational quantum number, and the parity are given for the upper state and for the lower state. In the ninth column, the experimental transition frequency is reported, and in the tenth column, its difference to the transition frequency calculated from the respective Hamiltonian fit. All frequencies are given in MHz.