Chandra X-ray Observatory Observations of 13 Fermi LAT Sources
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866929478104514560 |
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| author | Rangelov, Blagoy Yang, Hui Williams, Brice Kargaltsev, Oleg Hare, Jeremy Martinic, Kean |
| author_facet | Rangelov, Blagoy Yang, Hui Williams, Brice Kargaltsev, Oleg Hare, Jeremy Martinic, Kean |
| contents | In the latest data release from the Fermi $γ$-ray Space Telescope (the 4th Fermi LAT 14 yr Catalog, or 4FGL), more than 50% of the Galactic sources are yet to be identified. We observed 13 unidentified Fermi LAT sources with the Chandra X-Ray Observatory to explore their nature. We report the results of the classification of X-ray sources in the fields of these $γ$-ray sources and discuss the implications for their nature. We use multiwavelength (MW) data for a machine-learning classification, accompanied by a more detailed spectral/variability analysis for brighter sources. Eight 4FGL sources have $γ$-ray pulsars within their position error ellipses. We consider three of these pulsars (PSR J1906+0722, PSR J1105-6037, and PSR J1358-6025) to be detected in X-rays, while PSR J1203-6242 shows a hint of X-ray emission. Within the positional uncertainties of three of the 4FGL sources, we detect X-ray sources that may be yet unknown pulsars, depending on the MW association. In addition to point sources, we discovered two extended sources, one of which is likely to be a bow-shock pulsar-wind nebula associated with PSR J1358-6025. Finally, we classify other X-ray sources detected in these observations and report the most interesting classifications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_13594 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Chandra X-ray Observatory Observations of 13 Fermi LAT Sources Rangelov, Blagoy Yang, Hui Williams, Brice Kargaltsev, Oleg Hare, Jeremy Martinic, Kean High Energy Astrophysical Phenomena In the latest data release from the Fermi $γ$-ray Space Telescope (the 4th Fermi LAT 14 yr Catalog, or 4FGL), more than 50% of the Galactic sources are yet to be identified. We observed 13 unidentified Fermi LAT sources with the Chandra X-Ray Observatory to explore their nature. We report the results of the classification of X-ray sources in the fields of these $γ$-ray sources and discuss the implications for their nature. We use multiwavelength (MW) data for a machine-learning classification, accompanied by a more detailed spectral/variability analysis for brighter sources. Eight 4FGL sources have $γ$-ray pulsars within their position error ellipses. We consider three of these pulsars (PSR J1906+0722, PSR J1105-6037, and PSR J1358-6025) to be detected in X-rays, while PSR J1203-6242 shows a hint of X-ray emission. Within the positional uncertainties of three of the 4FGL sources, we detect X-ray sources that may be yet unknown pulsars, depending on the MW association. In addition to point sources, we discovered two extended sources, one of which is likely to be a bow-shock pulsar-wind nebula associated with PSR J1358-6025. Finally, we classify other X-ray sources detected in these observations and report the most interesting classifications. |
| title | Chandra X-ray Observatory Observations of 13 Fermi LAT Sources |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2307.13594 |