ESO 137−001. Blue: X-rays (Sun et al. 2010). Red: Hα (Sun et al. 2022). Green: CO (Jáchym et al. 2019). The main features of the system are labeled. It appears that the X-ray stripping front is ahead of the Hα stripping front because of the large spatial smoothing scale of the X-ray image, but in reality the X-ray and Hα stripping fronts are at the same position, as shown in Fig. 2 of Luo et al. (2023). For a more detailed image, see Fig. 4.