Time Delay Measurements for the Cluster-lensed Sextuple Quasar SDSS J2222+2745

  title={Time Delay Measurements for the Cluster-lensed Sextuple Quasar SDSS J2222+2745},
  author={H{\aa}kon Dahle and Michael D. Gladders and Keren Sharon and Matthew B. Bayliss and Jane R. Rigby},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
We report first results from an ongoing monitoring campaign to measure time delays between the six images of the quasar SDSS\,J2222$+$2745, gravitationally lensed by a galaxy cluster. The time delay between A and B, the two most highly magnified images, is measured to be $\tau_{\rm AB} = 47.7 \pm 6.0$ days (95\% confidence interval), consistent with previous model predictions for this lens system. The strong intrinsic variability of the quasar also allows us to derive a time delay value of… 

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