bugfix: added term to shear estimator with l1 <--> l2 swapped #10
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The auto- and cross-spectra (with the true lensing potential) of shear reconstructions were previously biased low. With this bugfix, we recover the expected behaviour. It might not be the fix that best fits the style of the code, but I hope it is a good starting point for a more elegant and permanent one.
Member
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Hi @abaleato thanks for contributing this. I'll have a look. Did you mean to close it though? |
Author
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Hi @msyriac. Well, I decided I wanted to run some more tests before bothering you, but I was too clumsy to even backtrack on my steps! Let me know what you think: I am quite sure that there's a bug, but I'd appreciate you checking also. |
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If I remember correctly there was some difference in the formula of the large scale limit shear estimator between Schaan-Ferraro 2018 v1 vs v2 on arxiv, hence the bug. I think there were a few small changes to make it consistent (I believe to make it work with asymmetric maps too). When I have time I will check my clone of symlens. |
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Hi Mat. Thanks for making this great code available! I think I have found and corrected a small bug. The auto- and cross-spectra (with the true lensing potential) of shear reconstructions were previously biased low. With this bugfix, we recover the expected behaviour, while passing all existing tests. It might not be the fix that best fits the style of the code, but I hope it is a good starting point for a more elegant and permanent one.