Gamma-ray Flares of Flat Spectrum Radio Quasars: A statistical view
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866913926867845120 |
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| author | Pacciani, Luigi |
| author_facet | Pacciani, Luigi |
| contents | Based on a 10 years sample of gamma-ray flares of FSRQs collected with FERMI and AGILE, I report on this proceeding the advance on a statistical study of variability for a sample of more than 300 FSRQs. I will focus on waiting time between flares (defined as the time intervals between consecutive activity peaks (Pacciani 2022). The investigation revealed that gamma-ray activity can be modeled with overlapping bursts of flares, with flares uniformly distributed within each burst, and a typical burst rate of 0.6 y$^{-1}$. Moreover, a statistically relevant fast component with timescale of order of days is revealed. From these results, constraints on flares emission mechanisms were derived. I also discuss the preliminary results on an investigation of flares luminosity and duration in gamma-rays. A Simple fitting model is shown, correlating peak luminosity and duration of gamma-ray flares (paper in preparation). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_03494 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gamma-ray Flares of Flat Spectrum Radio Quasars: A statistical view Pacciani, Luigi High Energy Astrophysical Phenomena Based on a 10 years sample of gamma-ray flares of FSRQs collected with FERMI and AGILE, I report on this proceeding the advance on a statistical study of variability for a sample of more than 300 FSRQs. I will focus on waiting time between flares (defined as the time intervals between consecutive activity peaks (Pacciani 2022). The investigation revealed that gamma-ray activity can be modeled with overlapping bursts of flares, with flares uniformly distributed within each burst, and a typical burst rate of 0.6 y$^{-1}$. Moreover, a statistically relevant fast component with timescale of order of days is revealed. From these results, constraints on flares emission mechanisms were derived. I also discuss the preliminary results on an investigation of flares luminosity and duration in gamma-rays. A Simple fitting model is shown, correlating peak luminosity and duration of gamma-ray flares (paper in preparation). |
| title | Gamma-ray Flares of Flat Spectrum Radio Quasars: A statistical view |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2507.03494 |