Detection of QPO Soft Lag during the Outburst of Swift J1727.8-1613: Estimation of Intrinsic Parameters from Spectral Study Article Swipe
Dipak Debnath
,
Sujoy Kumar Nath
,
Debjit Chatterjee
,
Kaushik Chatterjee
,
Hsiang‐Kuang Chang
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.3847/1538-4357/ad7a76
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.3847/1538-4357/ad7a76
The recently discovered bright transient black hole candidate Swift J1727.8-1613 is studied in a broad energy range (0.5–79 keV) using combined NICER and NuSTAR data taken on 2023 August 29. A prominent type C quasiperiodic oscillation (QPO) at 0.89 ± 0.01 Hz with its harmonic was observed in NICER data of 0.5–10 keV. Interestingly, the harmonic becomes weaker in the lower energy bands (0.5–1 and 1–3 keV). We also report the first detection of a soft time lag of 0.014 ± 0.001 s at the QPO frequency between harder (3–10 keV) and softer (0.5–3 keV) band photons observed with the NICER/X-ray timing instrument. This indicates that the inclination of the accretion disk in the binary system might be high. From the detailed spectral analysis with the relxill reflection model, we found the disk inclination angle of the source to be ∼85°. We discuss how the accretion flow configuration inferred from spectral analysis can help us understand the origin of QPOs and soft lag in this source.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3847/1538-4357/ad7a76
- OA Status
- gold
- Cited By
- 3
- References
- 66
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- OpenAlex ID
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All OpenAlex metadata
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https://doi.org/10.3847/1538-4357/ad7a76Digital Object Identifier
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Detection of QPO Soft Lag during the Outburst of Swift J1727.8-1613: Estimation of Intrinsic Parameters from Spectral StudyWork title
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articleOpenAlex work type
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enPrimary language
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2024Year of publication
- Publication date
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2024-11-01Full publication date if available
- Authors
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Dipak Debnath, Sujoy Kumar Nath, Debjit Chatterjee, Kaushik Chatterjee, Hsiang‐Kuang ChangList of authors in order
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https://doi.org/10.3847/1538-4357/ad7a76Publisher landing page
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goldOpen access status per OpenAlex
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https://doi.org/10.3847/1538-4357/ad7a76Direct OA link when available
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Physics, Astrophysics, Swift, Lag, Time lag, Astronomy, Computer science, Computer networkTop concepts (fields/topics) attached by OpenAlex
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3Total citation count in OpenAlex
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2025: 3Per-year citation counts (last 5 years)
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| abstract_inverted_index.source | 138 |
| abstract_inverted_index.system | 116 |
| abstract_inverted_index.timing | 102 |
| abstract_inverted_index.weaker | 58 |
| abstract_inverted_index.(3–10 | 90 |
| abstract_inverted_index.becomes | 57 |
| abstract_inverted_index.between | 88 |
| abstract_inverted_index.discuss | 143 |
| abstract_inverted_index.photons | 97 |
| abstract_inverted_index.relxill | 127 |
| abstract_inverted_index.source. | 166 |
| abstract_inverted_index.studied | 12 |
| abstract_inverted_index.(0.5–1 | 64 |
| abstract_inverted_index.(0.5–3 | 94 |
| abstract_inverted_index.0.5–10 | 52 |
| abstract_inverted_index.Abstract | 0 |
| abstract_inverted_index.analysis | 124, 152 |
| abstract_inverted_index.combined | 21 |
| abstract_inverted_index.detailed | 122 |
| abstract_inverted_index.harmonic | 45, 56 |
| abstract_inverted_index.inferred | 149 |
| abstract_inverted_index.observed | 47, 98 |
| abstract_inverted_index.recently | 2 |
| abstract_inverted_index.spectral | 123, 151 |
| abstract_inverted_index.∼85°. | 141 |
| abstract_inverted_index.(0.5–79 | 18 |
| abstract_inverted_index.accretion | 111, 146 |
| abstract_inverted_index.candidate | 8 |
| abstract_inverted_index.detection | 73 |
| abstract_inverted_index.frequency | 87 |
| abstract_inverted_index.indicates | 105 |
| abstract_inverted_index.prominent | 32 |
| abstract_inverted_index.transient | 5 |
| abstract_inverted_index.discovered | 3 |
| abstract_inverted_index.reflection | 128 |
| abstract_inverted_index.understand | 156 |
| abstract_inverted_index.NICER/X-ray | 101 |
| abstract_inverted_index.inclination | 108, 134 |
| abstract_inverted_index.instrument. | 103 |
| abstract_inverted_index.oscillation | 36 |
| abstract_inverted_index.J1727.8-1613 | 10 |
| abstract_inverted_index.configuration | 148 |
| abstract_inverted_index.quasiperiodic | 35 |
| abstract_inverted_index.Interestingly, | 54 |
| cited_by_percentile_year.max | 97 |
| cited_by_percentile_year.min | 96 |
| corresponding_author_ids | https://openalex.org/A5079541073, https://openalex.org/A5003247622 |
| countries_distinct_count | 0 |
| institutions_distinct_count | 5 |
| sustainable_development_goals[0].id | https://metadata.un.org/sdg/7 |
| sustainable_development_goals[0].score | 0.8999999761581421 |
| sustainable_development_goals[0].display_name | Affordable and clean energy |
| citation_normalized_percentile.value | 0.82273615 |
| citation_normalized_percentile.is_in_top_1_percent | False |
| citation_normalized_percentile.is_in_top_10_percent | False |