MG15 - Talk detail |
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Participant |
Ghirlanda, Giancarlo | |||||||
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Institution |
INAF Osservatorio Brera - Via E. Bianchi 46 - Merate - Milano - Italy | |||||||
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Session |
GB6 |
Accepted |
Yes |
Order |
8 |
Time |
18:30 | 25' |
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Talk |
Oral abstract |
Title |
The POSyTIVE approach to the study of Gamma Ray Bursts with the Cherenkov Telescope Array. | |||||
| Coauthors | Ghirlanda, G. - on behalf of the CTA Transient SWG. | |||||||
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Abstract |
The emission of Gamma Ray Bursts at very high energies (>100 GeV) is completely unexplored. The detection of GRBs by the CTA will reveal the physics of acceleration of particles at very high energies by relativistic shocks and the details of the emission mechanism (e.g. magnetic field and particle energy densities). The compelling questions are how many GRBs will be detected by CTA and how well CTA will characterise the GRBs’ prompt and afterglow emission. Through a POpulation Synthesis Theory Integrated code for Very-high energy Emission (POSyTIVE) we model the prompt and afterglow emission components (accounting for synchrotron and Inverse Compton) of the population of Long and Short GRBs after calibrating the code free parameters (i.e. microphysical parameters of the shock emission) through all the available multi-wavelength observations of these sources (collected in the last 40 years). Predictions for the CTA detection rates and study of individual simulated GRBs (e.g. through time resolved spectral analysis) are performed through the CTA public simulations and analysis tools (ctools and gammapy). Preliminary results and current status of the project will be presented and the possible unique science cases explorable by the CTA discussed. |
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Pdf file |
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Session |
GB3 |
Accepted |
Yes |
Order |
3 |
Time |
16:05 | 20' |
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Talk |
Oral abstract |
Title |
Unveiling and studying Gamma Ray Bursts at high redshifts | |||||
| Coauthors | ||||||||
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Abstract |
The detection of high redshift GRBs requires dedicated missions, like Theseus, which can reveal and study tens of events at z>5. These will constitute the best sample for cosmological studies. I will describe the expected rates and emission (prompt and afterglow) properties of the high redshift detected GRB population. They will help to understand the emission mechanism of the prompt phase, to constrain the global energetic (and geometry) of these sources and to unveil, through multi-wavelength observations, how primordial massive stars form and evolve. The multi wavelength study of GRBs is fundamental to understand the structure of GRB outflows in the era of multi-messenger astronomy. |
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Pdf file |
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