• Corpus ID: 235125645

CDF-S XT1: The off-axis afterglow of a neutron star merger at $z=2.23$

@inproceedings{Sarin2021CDFSXT,
  title={CDF-S XT1: The off-axis afterglow of a neutron star merger at \$z=2.23\$},
  author={Nikhil Sarin and Gregory Ashton and Paul D. Lasky and Kendall Ackley and Y.-L. Mong and Duncan K. Galloway},
  year={2021}
}
CDF-S XT1 is a fast-rising non-thermal X-ray transient detected by Chandra in the Deep-Field South Survey. Although various hypotheses have been suggested, the origin of this transient remains unclear. Here, we show that the observations of CDF-S XT1 are well explained as the X-ray afterglow produced by a relativistic structured jet viewed off-axis. We measure properties of the jet, showing that they are similar to those of GRB170817A, albeit at cosmological distances. We measure the observers… 

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