Anti-correlation between Flux and Photon Index of Hard X-ray Emission from The Crab
Fuente:
arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866929758049140736 |
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| author | Augustine, Koothodil Abhijith Chang, Hsiang-Kuang |
| author_facet | Augustine, Koothodil Abhijith Chang, Hsiang-Kuang |
| contents | Using \textit{Swift} Burst Alert Telescope (BAT) event-mode data during Gamma Ray Burst (GRB) occurrences, we conducted spectral analysis for the Crab system. From 38 good observations, which spans over a period of 18 years from 2006 to 2023, we found that the Crab's X-ray flux does not only flicker, but also significantly anti-correlates to its spectral power-law photon index. Since emission contribution of the Crab pulsar in this energy range is small, this anti-correlation is mainly about the emission of the Crab nebula. We suggest that this anti-correlation is an observational supporting evidence for the long-standing notion that the nebula emission is due to synchrotron radiation of shocked pulsar winds in the nebula. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_00406 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Anti-correlation between Flux and Photon Index of Hard X-ray Emission from The Crab Augustine, Koothodil Abhijith Chang, Hsiang-Kuang High Energy Astrophysical Phenomena Using \textit{Swift} Burst Alert Telescope (BAT) event-mode data during Gamma Ray Burst (GRB) occurrences, we conducted spectral analysis for the Crab system. From 38 good observations, which spans over a period of 18 years from 2006 to 2023, we found that the Crab's X-ray flux does not only flicker, but also significantly anti-correlates to its spectral power-law photon index. Since emission contribution of the Crab pulsar in this energy range is small, this anti-correlation is mainly about the emission of the Crab nebula. We suggest that this anti-correlation is an observational supporting evidence for the long-standing notion that the nebula emission is due to synchrotron radiation of shocked pulsar winds in the nebula. |
| title | Anti-correlation between Flux and Photon Index of Hard X-ray Emission from The Crab |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2408.00406 |