Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage
Abstract
:1. Introduction
2. Observations and Data Analysis
3. Results and Discussion
4. Conclusions
- The presence of multiple GeV flares during each periastron passage is confirmed.
- A time delay of the main GeV flux peaks exists in its last four periastron passages.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
1 | https://fermi.gsfc.nasa.gov/ssc/data/analysis/software/ (accessed on 1 December 2021) |
2 | https://fermi.gsfc.nasa.gov/ssc/data/analysis/documentation/Pass8_usage.html (accessed on 1 December 2021) |
3 | https://fermi.gsfc.nasa.gov/ssc/data/analysis/scitools/source_models.html (accessed on 1 December 2021) |
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PowerLaw | Cutoff PowerLaw | |||||
---|---|---|---|---|---|---|
Year | Index | TS Value | Index | CutOff (GeV) | TS Value | ΔTS |
2010 | 3.03 ± 0.03 | 463 | 2.48 ± 0.11 | 0.67 ± 0.17 | 467 | 4 |
2014 | 3.19 ± 0.04 | 315 | 2.51 ± 0.07 | 0.43 ± 0.06 | 398 | 83 |
2017 | 2.94 ± 0.07 | 512 | 2.13 ± 0.03 | 0.56 ± 0.05 | 538 | 26 |
2021 | 2.99 ± 0.07 | 636 | 2.34 ± 0.03 | 0.59 ± 0.09 | 689 | 53 |
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Chang, Z.; Zhang, S.; Chen, Y.-P.; Ji, L.; Kong, L.-D.; Wang, P.-J. Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage. Universe 2021, 7, 472. https://doi.org/10.3390/universe7120472
Chang Z, Zhang S, Chen Y-P, Ji L, Kong L-D, Wang P-J. Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage. Universe. 2021; 7(12):472. https://doi.org/10.3390/universe7120472
Chicago/Turabian StyleChang, Zhi, Shu Zhang, Yu-Peng Chen, Long Ji, Ling-Da Kong, and Peng-Ju Wang. 2021. "Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage" Universe 7, no. 12: 472. https://doi.org/10.3390/universe7120472
APA StyleChang, Z., Zhang, S., Chen, Y. -P., Ji, L., Kong, L. -D., & Wang, P. -J. (2021). Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage. Universe, 7(12), 472. https://doi.org/10.3390/universe7120472