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Accurate flux calibration of GW170817: is the X-ray counterpart on the rise?
- Source :
-
Monthly Notices of the Royal Astronomical Society . Feb2022, Vol. 510 Issue 2, p1902-1909. 8p. - Publication Year :
- 2022
-
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 ≈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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *X-rays
*CALIBRATION
*GAMMA ray bursts
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 510
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 154800896
- Full Text :
- https://doi.org/10.1093/mnras/stab3533