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galsci / pysm

PySM 3: Sky emission simulations for Cosmic Microwave Background experiments
https://pysm3.readthedocs.io/
BSD 3-Clause "New" or "Revised" License
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Making Gaussian realisaions of foregrounds ? #48

Closed YutoMinami closed 4 years ago

YutoMinami commented 4 years ago

For the validation, I'd like to make some different realisations of foregrounds assuming Gaussian variance. Are there any way to implement this in PySM? I can realise using healpy for each output frequency map. However, foreground maps should be correlated among frequencies. I think I have to create different realisations before the colour corrections.

zonca commented 4 years ago

the components included in PySM are deterministic. Maybe you can check this: https://so-pysm-models.readthedocs.io/en/latest/models.html#gaussiansynchrotron

YutoMinami commented 4 years ago

Thank you. The page looks very helpful for me. As a tentative treatment, I made different realisations of a pivot frequency map following Gaussian fluctuations, and extrapolate them to each frequency as d1 or s1 models in PySM do.