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![[Figure 5]](jo5121fig5mag.jpg)
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Figure 5
SVD of time-resolved icAS spectra. (a) Red to blue, spectra collected on LOV2 crystals, during the relaxation from the photoproduct to the ground state, smoothed and constant-baseline corrected as described by Aumonier et al. (2022  ). (b) Light − dark difference absorption spectra. (c) Five first time-invariant components (lSV) resulting from the decomposition of the series of difference spectra: lSV0 (red) dominates the series and contains the negative difference absorption band at 390 nm corresponding to photoproduct relaxation, as well as the large positive band spanning from 420 to 500 nm corresponding to ground-state recovery; lSV1 (orange) is mostly flat but contains some sparse features from 350 to 510 nm corresponding to systematic background-noise elements; and lSV2 (pale yellow), lSV3 (pale green) and lSV4 (green–blue) only contain non-systematic background noise. (d) Time-varying magnitudes (rSV) resulting from the decomposition: rSV0 (red) follows the exponential decay kinetics identified by Aumonier et al. (2022); rSV1 (orange) follows a linear decay trend, identified as a crystal-displacement component within the loop over the duration of data collection; and rSV2 (pale yellow), rSV3 (pale green) and rSV4 (green–blue) are flat and correspond to background-noise components. |
![[Figure 5]](jo5121fig5.jpg)
 | JOURNAL OF APPLIED CRYSTALLOGRAPHY |
ISSN: 1600-5767
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