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Bayesian redshift estimation
The pull request for updating bayez to the new specsim api is almost completed I just need to finish the update on desi_bayez. I think the main thing that needs to be changed is that the downsample method should be removed from that file entirely and probably placed in another module all together. Should we create something like a helper module to migrate functions like migrate to? What do you think the best approach is for changing this file.
I'm also not sure how these changes should be tested.
This issue is to add a bayez.desi
module to encapsulate DESI-specific interfaces to bayez. I suggest the following functions:
read_bricks()
: Read b,r,z bricks and prepare for analysis by bayez.write_bricks()
: Write b,r,z, bricks including truth using spectra generated by bayez simulation code.write_zbest()
: Write bayez results to zbest file.desi_zfit()
: Read bricks, perform redshift fits, and write zbest file.To whom it may concern,
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Define a boolean truth selector:
T(v1) = { c | zfit - ztrue | / (1 + ztrue) < v1 }
and a boolean data selector, for example:
D(v2) = { c (z68hi - z68lo) / 2 / (1 + zbest) < v2 }
Then we can count the numbers of fits in four exclusive categories, which sum to N(total):
Focus on two metrics:
This issue is to:
The optimum might be different for different target categories and can be used to set ZWARN = ~D(v2).
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