A Cyclic Burst Rate Behavior of a Persistent X-ray Burster: Recent XMM-Newton and NuSTAR Observations of 4U 1323-62
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866910209834745856 |
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| author | Boztepe, Tugba Guver, Tolga Gogus, Ersin Altamirano, Diego Speicher, Julia Luff, Brian Ballantyne, David R. |
| author_facet | Boztepe, Tugba Guver, Tolga Gogus, Ersin Altamirano, Diego Speicher, Julia Luff, Brian Ballantyne, David R. |
| contents | In this study, we report partly simultaneous XMM-Newton and NuSTAR observations of the bursting, dipping low mass X-ray binary, 4U 1323-62 obtained in 2024. 4U 1323-62 is one of the well-known persistent bursters, with bursts occurring roughly every three hours. It is also one of the few sources for which the orbital period is known, and shows dips in X-rays. In this paper, we report the detection of 12 unique bursts with XMM-Newton and NuSTAR, 6 of them observed jointly. We detected two double burst events, one with the NuSTAR and another one observed with both missions. Based on the long-term behavior of 4U 1323-62, we unveil a cyclic trend in its burst rate, with a period of about 10 years. During our observations we detected 10 X-ray dips with a periodicity of 2.942 hours, in line with previous measurements. We also present the results of the time resolved X-ray spectral analysis of the bursts and show the limits on the cooling of the corona heated by the burst emission. We also found a 0.898 +/- 0.017 Hz quasi-periodic oscillation (QPO) during the non-bursting and non-dipping times confirming previous detections. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_11121 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A Cyclic Burst Rate Behavior of a Persistent X-ray Burster: Recent XMM-Newton and NuSTAR Observations of 4U 1323-62 Boztepe, Tugba Guver, Tolga Gogus, Ersin Altamirano, Diego Speicher, Julia Luff, Brian Ballantyne, David R. High Energy Astrophysical Phenomena In this study, we report partly simultaneous XMM-Newton and NuSTAR observations of the bursting, dipping low mass X-ray binary, 4U 1323-62 obtained in 2024. 4U 1323-62 is one of the well-known persistent bursters, with bursts occurring roughly every three hours. It is also one of the few sources for which the orbital period is known, and shows dips in X-rays. In this paper, we report the detection of 12 unique bursts with XMM-Newton and NuSTAR, 6 of them observed jointly. We detected two double burst events, one with the NuSTAR and another one observed with both missions. Based on the long-term behavior of 4U 1323-62, we unveil a cyclic trend in its burst rate, with a period of about 10 years. During our observations we detected 10 X-ray dips with a periodicity of 2.942 hours, in line with previous measurements. We also present the results of the time resolved X-ray spectral analysis of the bursts and show the limits on the cooling of the corona heated by the burst emission. We also found a 0.898 +/- 0.017 Hz quasi-periodic oscillation (QPO) during the non-bursting and non-dipping times confirming previous detections. |
| title | A Cyclic Burst Rate Behavior of a Persistent X-ray Burster: Recent XMM-Newton and NuSTAR Observations of 4U 1323-62 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2605.11121 |