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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2507.02750 |
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| _version_ | 1866909675037917184 |
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| author | Khokhriakova, Alena Becker, Werner Predehl, Peter Sanders, Jeremy S. Freyberg, Michael Schwope, Axel |
| author_facet | Khokhriakova, Alena Becker, Werner Predehl, Peter Sanders, Jeremy S. Freyberg, Michael Schwope, Axel |
| contents | 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 Niu et al. 2025 (arXiv:2501.17046). The eROSITA PSF model is known to underestimate emission in the wings beyond 1'. This prevents a reliable detection of faint nebular emission around PSR B0656+14 as claimed in arXiv:2501.17046. 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 the authors of arXiv:2501.17046 that the X-ray emission in the (4-10)' region is associated with the degree-scale gamma-ray halo recently found by the High-Altitude Water Cherenkov Observatory (HAWC), and shows that it originates from the pulsar due to the wings of the PSF. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_02750 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On the origin of the X-ray emission surrounding PSR B0656+14 in the eROSITA Cal-PV data Khokhriakova, Alena Becker, Werner Predehl, Peter Sanders, Jeremy S. Freyberg, Michael Schwope, Axel High Energy Astrophysical Phenomena 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 Niu et al. 2025 (arXiv:2501.17046). The eROSITA PSF model is known to underestimate emission in the wings beyond 1'. This prevents a reliable detection of faint nebular emission around PSR B0656+14 as claimed in arXiv:2501.17046. 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 the authors of arXiv:2501.17046 that the X-ray emission in the (4-10)' region is associated with the degree-scale gamma-ray halo recently found by the High-Altitude Water Cherenkov Observatory (HAWC), and shows that it originates from the pulsar due to the wings of the PSF. |
| title | On the origin of the X-ray emission surrounding PSR B0656+14 in the eROSITA Cal-PV data |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2507.02750 |