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integrate fitting using dynesty

Open timothydmorton opened this issue 4 years ago • 4 comments

ping @dfm

timothydmorton avatar Oct 15 '19 22:10 timothydmorton

I implemented this mash up here: https://github.com/dfm/gaia-isochrones/blob/master/gaia_isochrones/stellar.py#L115-L179 and I don't think it would be too hard to integrate directly into isochrones!

dfm avatar Oct 16 '19 14:10 dfm

I also added support for jitter parameters on all the photometry, but it doesn't seem to make much difference most of the time...

dfm avatar Oct 16 '19 14:10 dfm

Would you be interested to add support for https://johannesbuchner.github.io/UltraNest/ ? The interface should be very similar to dynesty and multinest.

UltraNest is a very reliable tuning-parameter-free algorithm. I have published some examples where the UltraNest algorithm is unbiased while pymultinest gives a different answer. UltraNest is a pure-python package and very easy to install with pip or conda.

UltraNest also supports resuming from disk and MPI parallelisation, if that is useful to you.

JohannesBuchner avatar Feb 11 '21 11:02 JohannesBuchner

This sounds exciting; thanks for the tip! I'm certainly interested and will check it out whenever I next find myself with a few days to hack on isochrones.

timothydmorton avatar Feb 11 '21 18:02 timothydmorton