Observed transitions CS J = 1−0 and OCS J = 4−3 transitions using the UV lamp. The integration time was 20 s per spectrum. The spectral resolution of the data is 380 kHz. The upper panels show spectra at selected times while the intermediate panel shows the line integrated intensity (in K × MHz) of CS and OCS as a function of time. Finally, the bottom panel shows the intensity derived from the mass spectrum for different masses (CS₂, OCS, H₂O, S and O₂, SO₂, and CO). A video showing the whole set of data is available online.