Notebook about stack measurements of size & centroid on pixelized images

LSSTScienceCollaborations / StackClub

Learning the LSST software Stack, by writing jupyter notebook tutorials.

https://stackclub.readthedocs.io/

MIT License

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Notebook about stack measurements of size & centroid on pixelized images #210

Closed andrewkbradshaw closed 5 years ago

andrewkbradshaw commented 5 years ago

This notebook simulates and measures objects near the pixel scale, illustrating a bias in the calculation of moments on pixelized images. A corrective algorithm modification is proposed. This addresses the very core of issue #123 . Looking for a reviewer!

andrewkbradshaw commented 5 years ago

Thanks for the great suggestions Alex. Removing the source extractor was a good idea. I removed the corrected first moment definition, and added another wider Gaussian weight to the centroid measurement to illustrate the issue. Is this ready to merge to master? @kadrlica