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This update is to begin modelling CRACO.

I have added code from Andy to calculate CRACO beamshapes.

However, the ability of CRACO to probe wider FRBs - and evidence from observations - suggests the need to update scattering. We now have the ability to set intrinsic width ~ (1+z) and scattering to go as (1+z)^-3

See new plot in scripts/Scattering that shows the effect of different scattering treatments,.

I have NOT updated the default values however. Nor have I determined if the new upper-lognormal (lognormal on lower-side, log-constant on upper side) function is reasonable. Next step is to work out how to fit for this!

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@profxj profxj left a comment

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Holy new code!

Great stuff. My main additional request is to add a few
tests related to the new width code.

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great stuff!

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@JordanHoffmann3 JordanHoffmann3 left a comment

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I think it makes sense to me after a lot of staring

@cwjames1983 cwjames1983 merged commit ddfa77e into main May 29, 2025
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4 participants