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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2409.16941 |
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| _version_ | 1866914957049724928 |
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| author | Kaddouh, Mohamad Ali Sudha, Malu Ludlam, Renee M. |
| author_facet | Kaddouh, Mohamad Ali Sudha, Malu Ludlam, Renee M. |
| contents | We present the temporal analysis of the persistent neutron star low-mass X-ray binary (NS LMXB) GX 13+1 using NICER data. Classification of this source has been ambiguous so far. We investigate the evolution of the source in its hardness-intensity diagram (HID) and power density spectra (PDS) of the 0.5-10 keV NICER archival data. For the first time, we detect the source tracing out the entire Z-track, distinctly identifying the horizontal branch (HB), normal branch (NB) and flaring branch (FB). We also detect a peaked noise component in the PDS at $\sim$ 5.4 Hz, which appears to be present when the source is either in the NB or FB. We note a positive slope of the HB in the HID which could be due to either the high intrinsic absorption of the source or the stronger contribution of the soft spectral components in the soft energy domain. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_16941 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | NICER observes the full Z-track in GX 13+1 Kaddouh, Mohamad Ali Sudha, Malu Ludlam, Renee M. High Energy Astrophysical Phenomena We present the temporal analysis of the persistent neutron star low-mass X-ray binary (NS LMXB) GX 13+1 using NICER data. Classification of this source has been ambiguous so far. We investigate the evolution of the source in its hardness-intensity diagram (HID) and power density spectra (PDS) of the 0.5-10 keV NICER archival data. For the first time, we detect the source tracing out the entire Z-track, distinctly identifying the horizontal branch (HB), normal branch (NB) and flaring branch (FB). We also detect a peaked noise component in the PDS at $\sim$ 5.4 Hz, which appears to be present when the source is either in the NB or FB. We note a positive slope of the HB in the HID which could be due to either the high intrinsic absorption of the source or the stronger contribution of the soft spectral components in the soft energy domain. |
| title | NICER observes the full Z-track in GX 13+1 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2409.16941 |