  New rotational line strengths for the C2 Swan system have been calculated for
vibrational bands with v'=0-10 and v"=0-9, and J values up to J=34-96, based on
previous observations in 30 vibrational bands. Line positions from several
sources were combined with the results from recent deperturbation studies of
the v'=4 and v'=6 states, and a weighted global least squares fit was
performed. We report the updated molecular constants. The line strengths are
based on a recent ab initio calculation of the transition dipole moment
function. A line list has been made available, including observed and
calculated line positions, Einstein A coefficients and oscillator strengths
(f-values). The line list will be useful for astronomers and combustion
scientists who utilize C2 Swan spectra. Einstein A coefficients and f-values
were also calculated for the vibrational bands of the Swan system.
