Upper panel: Suzaku/XIS spectrum of the candidate PSR J1028 − 5819 X-ray counterpart obtained using data from the three XIS CCDs. The background level is marked in blue and the best-fit PL model in red. Lower panel: fit residuals. The residuals show some (rather small) structures. In the 1.5–2 keV interval, they are probably associated with the Si K-edge remain, while around 5 keV they likely arise from the different responses of the BI and FI detectors around this energy. However, we note that most residuals are within 1σ from the best-fit PL model.