For MeSCN in DMSO, we have measured and analyzed two independent data sets. One comes from our previous publication on edge-pixel referencing, and we refer to these as the 2020 data. We have also collected a new set of data that we will identify as the 2021 data. The original motivation for collecting the 2020 data was to compare data processed by two different referencing schemes. We were, therefore, not motivated to account for the background solvent response. On the other hand, in the 2021 data the pump pulse is lower in energy by ~8× compared to the 2020 measurements, and we have subtracted the solvent background for this measurement. The other notable differences between the data sets are the concentration (2020 is 200 mM, 2021 is 400 mM), the pathlength (2020 is 100 μm, 2021 is 50 μm), and that the 2020 data have significantly higher SNR due to more averaging and larger signal strength because of the higher pump energy. Figure shows the results of the CLS analysis of the two data sets. Having accounted for the background response, the CLS in the 2021 data set exhibits a single exponential decay, in contrast to what is seen in the 2020 data. In addition, the CLS decay times differ by 60% between data sets (5.8 ps vs. 3.3 ps) even if we only fit the long-time scale component for the 2020 data.