X-ray spectra from a portion of the remnant which is spatially coincident with the FoV of the 0823031001 XMM-Newton observation. Left panel: eRASS:4 data in the 0.3-1.7 keV energy band. To obtain a representative model for the background emission we made use of the black circlular nearby background control region, defined in Fig. 3, and applied the obtained best-fit model in the simultaneous fitting of the source and background emission of the on-source region. Right panel: pn, mos1, and mos2 data in the 0.5-1.7 keV energy band. The corresponding XMM-Newton background spectrum was obtained from the nearby 0823031401 XMM-Newton observation, which is free of the remnant emission.