A Lack of 9 s Periodicity in the Follow-up NuSTAR Observation of LS 5039
The Nuclear Spectroscopic Array (NuSTAR) observed the gamma-ray binary LS 5039 for a second time in order to check for the presence of a periodic signal candidate found in the data from the previous NuSTAR observation. We do not detect the candidate signal in the vicinity of its previously reported...
| Main Authors: | , , , |
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| Format: | Article |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad022d |
| _version_ | 1797627980006031360 |
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| author | Oleg Kargaltsev Jeremy Hare Igor Volkov Alexander Lange |
| author_facet | Oleg Kargaltsev Jeremy Hare Igor Volkov Alexander Lange |
| author_sort | Oleg Kargaltsev |
| collection | DOAJ |
| description | The Nuclear Spectroscopic Array (NuSTAR) observed the gamma-ray binary LS 5039 for a second time in order to check for the presence of a periodic signal candidate found in the data from the previous NuSTAR observation. We do not detect the candidate signal in the vicinity of its previously reported frequency, assuming the same orbital ephemeris as in our previous paper. This implies that the previously reported periodic signal candidate was a noise fluctuation. We also perform a comparison of the lightcurves from the two NuSTAR observations and the joint spectral fitting. Our spectral analysis confirms the phase dependence found from a single NuSTAR observation at a higher significance level. |
| first_indexed | 2024-03-11T10:32:02Z |
| format | Article |
| id | doaj.art-cca91474c7f94e11869a472d5937645a |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-11T10:32:02Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj.art-cca91474c7f94e11869a472d5937645a2023-11-14T15:56:05ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0195817910.3847/1538-4357/ad022dA Lack of 9 s Periodicity in the Follow-up NuSTAR Observation of LS 5039Oleg Kargaltsev0https://orcid.org/0000-0002-6447-4251Jeremy Hare1https://orcid.org/0000-0002-8548-482XIgor Volkov2Alexander Lange3Department of Physics, The George Washington University , 725 21st St. NW, Washington, DC 20052, USA ; kargaltsev@gwu.eduAstrophysics Science Division, NASA Goddard Space Flight Center, 8800 Greenbelt Rd., Greenbelt, MD 20771, USA; Center for Research and Exploration in Space Science and Technology, NASA/GSFC, Greenbelt, MD 20771, USA; The Catholic University of America , 620 Michigan Ave., N.E. Washington, DC 20064, USADepartment of Physics, The George Washington University , 725 21st St. NW, Washington, DC 20052, USA ; kargaltsev@gwu.eduDepartment of Physics, The George Washington University , 725 21st St. NW, Washington, DC 20052, USA ; kargaltsev@gwu.eduThe Nuclear Spectroscopic Array (NuSTAR) observed the gamma-ray binary LS 5039 for a second time in order to check for the presence of a periodic signal candidate found in the data from the previous NuSTAR observation. We do not detect the candidate signal in the vicinity of its previously reported frequency, assuming the same orbital ephemeris as in our previous paper. This implies that the previously reported periodic signal candidate was a noise fluctuation. We also perform a comparison of the lightcurves from the two NuSTAR observations and the joint spectral fitting. Our spectral analysis confirms the phase dependence found from a single NuSTAR observation at a higher significance level.https://doi.org/10.3847/1538-4357/ad022dHigh mass x-ray binary starsX-ray observatoriesX-ray point sourcesX-ray astronomyMagnetars |
| spellingShingle | Oleg Kargaltsev Jeremy Hare Igor Volkov Alexander Lange A Lack of 9 s Periodicity in the Follow-up NuSTAR Observation of LS 5039 The Astrophysical Journal High mass x-ray binary stars X-ray observatories X-ray point sources X-ray astronomy Magnetars |
| title | A Lack of 9 s Periodicity in the Follow-up NuSTAR Observation of LS 5039 |
| title_full | A Lack of 9 s Periodicity in the Follow-up NuSTAR Observation of LS 5039 |
| title_fullStr | A Lack of 9 s Periodicity in the Follow-up NuSTAR Observation of LS 5039 |
| title_full_unstemmed | A Lack of 9 s Periodicity in the Follow-up NuSTAR Observation of LS 5039 |
| title_short | A Lack of 9 s Periodicity in the Follow-up NuSTAR Observation of LS 5039 |
| title_sort | lack of 9 s periodicity in the follow up nustar observation of ls 5039 |
| topic | High mass x-ray binary stars X-ray observatories X-ray point sources X-ray astronomy Magnetars |
| url | https://doi.org/10.3847/1538-4357/ad022d |
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