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http://hdl.handle.net/20.500.12386/31985
Titolo: | Accurate flux calibration of GW170817: is the X-ray counterpart on the rise? | Autori: | E. Troja B. O'Connor G. Ryan PIRO, LUIGI RICCI, ROBERTO B. Zhang T. Piran Bruni, Gabriele S. B. Cenko H. van Eerten |
Data pubblicazione: | 2022 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 510 | Fascicolo: | 2 | Da pagina:: | 1902 | Abstract: | X-ray emission from the gravitational wave transient GW170817 is well described as non-thermal afterglow radiation produced by a structured relativistic jet viewed off-axis. We show that the X-ray counterpart continues to be detected at 3.3 years after the merger. Such long-lasting signal is not a prediction of the earlier jet models characterized by a narrow jet core and a viewing angle of about 20 deg, and is spurring a renewed interest in the origin of the X-ray emission. We present a comprehensive analysis of the X-ray dataset aimed at clarifying existing discrepancies in the literature, and in particular the presence of an X-ray rebrightening at late times. Our analysis does not find evidence for an increase in the X-ray flux, but confirms a growing tension between the observations and the jet model. Further observations at radio and X-ray wavelengths would be critical to break the degeneracy between models. | URI: | http://hdl.handle.net/20.500.12386/31985 | URL: | http://arxiv.org/abs/2104.13378v1 https://academic.oup.com/mnras/article/510/2/1902/6449400?login=true |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stab3533 | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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