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- W4387389638 abstract "The arrival of gravitational wave astronomy and a growing number of time-domain focused observatories are set to lead to a increasing number of detections of short gamma-ray bursts (GRBs) launched with a moderate inclination to Earth. Being nearby events, these are also prime candidates for very long-term follow-up campaigns and very-long-baseline interferometry (VLBI), which has implications for multi-messenger modelling, data analysis, and statistical inference methods applied to these sources. Here we present a comprehensive modelling update that directly incorporates into afterglowpy astrometric observations of the GRB position, Poissonian statistics for faint sources, and modelling of a trans-relativistic population of electrons. We use the revolutionary event GW170817 to demonstrate the impact of these extensions both for the best-fit physics parameters and model selection methods that assess the statistical significance of additional late-time emission components. By including in our analysis the latest Chandra X-ray observations of GRB 170817A, we find only weak evidence (less than two sigma) for a new emission component at late times, which makes for a slightly more natural fit to the centroid evolution and prediction for the external medium density." @default.
- W4387389638 created "2023-10-06" @default.
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- W4387389638 date "2023-10-03" @default.
- W4387389638 modified "2023-10-07" @default.
- W4387389638 title "Modelling of Long-Term Afterglow Counterparts to Gravitational Wave Events: The Full View of GRB 170817A" @default.
- W4387389638 doi "https://doi.org/10.48550/arxiv.2310.02328" @default.
- W4387389638 hasPublicationYear "2023" @default.
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