Strong Lens
Time Delay Challenge

Testing accuracy on thousands of simulated lenses - blind.

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Download TDC0

The TDC1 gateway dataset, "TDC0", is available for you to download and get started. The metrics from this starter exercise determined which Good Teams were granted access to the TDC1 main challenge. we'll be happy tell you whether you would have made the grade.

Download TDC1

The deadline for TDC1 submissions was July 1, 2014, and the TDC1 analysis paper by Liao et al was published in 2015. In early 2016 the TDC1 data was made public to help teams who did not participate in the challenge develop their algorithms. As well as the light curve data for all TDC1 rungs, you can download the ground truth catalogs as well, to enable you to validate your code.