Chandra (2018, left) and XMM-Newton (2021, right) full-band images of J1641+3755. The R = 5″ solid-line circle is centered on the optical position of the QSO. The dashed circle marks a field source. The dark stripe in the bottom right corner of the XMM-Newton image is an artifact due to a chip gap in the PN camera. Exposure times for the different instruments after removal of periods of high background are also reported.