The Nature of an Unidentified X-ray Source in the 7 Ms Chandra Deep Field-South Catalog
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916882758500352 |
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| author | Sullivan, Quinn P. Yu, Zhibo Brandt, William N. Luo, Bin Zou, Fan |
| author_facet | Sullivan, Quinn P. Yu, Zhibo Brandt, William N. Luo, Bin Zou, Fan |
| contents | In the 7 Ms Chandra Deep Field-South catalog, only one source, XID 912, was highly significantly detected in X-rays but had no formally reported counterparts in the UV, optical, infrared, or radio bands. We identified its potential JWST and VLT VIMOS counterparts and measured the corresponding aperture photometry to construct its spectral energy distribution (SED). We fitted this SED using CIGALE. The results indicate that the source is most likely an off-nuclear ultraluminous X-ray source, rather than a background active galactic nucleus. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_03656 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The Nature of an Unidentified X-ray Source in the 7 Ms Chandra Deep Field-South Catalog Sullivan, Quinn P. Yu, Zhibo Brandt, William N. Luo, Bin Zou, Fan Astrophysics of Galaxies In the 7 Ms Chandra Deep Field-South catalog, only one source, XID 912, was highly significantly detected in X-rays but had no formally reported counterparts in the UV, optical, infrared, or radio bands. We identified its potential JWST and VLT VIMOS counterparts and measured the corresponding aperture photometry to construct its spectral energy distribution (SED). We fitted this SED using CIGALE. The results indicate that the source is most likely an off-nuclear ultraluminous X-ray source, rather than a background active galactic nucleus. |
| title | The Nature of an Unidentified X-ray Source in the 7 Ms Chandra Deep Field-South Catalog |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2508.03656 |