LATE-TIME DETECTIONS OF THE X-RAY AFTERGLOW OF GRB 060729 WITH CHANDRA—THE LATEST DETECTIONS EVER OF AN X-RAY AFTERGLOW

@article{Grupe2010LATETIMEDO,
  title={LATE-TIME DETECTIONS OF THE X-RAY AFTERGLOW OF GRB 060729 WITH CHANDRA—THE LATEST DETECTIONS EVER OF AN X-RAY AFTERGLOW},
  author={Dirk Grupe and David N. Burrows and Xuefeng Wu and Xiang-Yu Wang and Bing Zhang and Enwei Liang and Gordon P. Garmire and J A Nousek and Neil A. Gehrels and George R. Ricker and Marshall W. Bautz},
  journal={The Astrophysical Journal},
  year={2010},
  volume={711},
  pages={1008 - 1016}
}
We report on five Chandra observations of the X-ray afterglow of the gamma-ray burst (GRB) 060729 performed between 2007 March and 2008 May. In all five observations, the afterglow is clearly detected. The last Chandra pointing was performed on 2008 May 4, 642 days after the burst—the latest detection of a GRB X-ray afterglow ever. A reanalysis of the Swift XRT light curve together with the three detections by Chandra in 2007 reveals a break at ∼1.0 Ms after the burst with a slight steepening… 

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