Observations of dense molecular gas towards the supernova remnants CTB 37A (G348.5+0.1) and G348.5-0.0 were carried out using the Mopra and Nanten2 radio telescopes.We present CO(2-1) and CS(1-0) emission maps of a region encompassing the CTB 37A TeV gammaray emission, HESS J1714-385, revealing regions of dense gas within associated molecular clouds.Some gas displays good overlap with gamma-ray emission, consistent with hadronic gamma-ray emission scenarios.Masses of gas towards the HESS J1714-385 TeV gammaray emission region were estimated, and were of the order of 10 3 -10 4 M .In the case of a purely hadronic origin for the gamma-ray emission, the cosmic ray flux enhancement is ∼80-1100 times the local solar value.This enhancement factor and other considerations allow a discussion of the age of CTB 37A, which is consistent with ∼10 4 yr.
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