2025RNAAS...9..154K

We present a cautionary assessment of the extended X-ray emission around PSR B0656+14 in eROSITA Cal-PV data in response to the work of S. Niu et al. The eROSITA point-spread function (PSF) model is known to underestimate emission in the wings beyond ${1}^{{\prime} }$. This prevents a reliable detection of faint nebular emission around PSR B0656+14 as claimed by S. Niu et al. In addition, spectral analysis shows the surrounding diffuse X-rays can be fitted with the same 2BB+PL model as the pulsar's emission itself. This strongly invalidates the interpretation by S. Niu et al. that the X-ray emission in the (4-10)${}^{{\prime} }$ region is associated with the degree-scale gamma-ray halo recently found by the High-Altitude Water Cherenkov Observatory, and shows that it originates from the pulsar due to the wings of the PSF.