CAMB: Trying to get count Cls without window function

[Luca Suter]

Hi! I've been trying to get the hang of CAMB and recreate some of the figures in papers I've read. One of the figures shows the effect of the window function on some of the source terms. I've tried setting the GaussianSourceWindow function to 0 width but that just breaks my code. I've looked around for a way to retrieve the Cl's without the window function but can't find any examples. How can I achieve this?

The figure in question:

Screenshot 2023-10-08 at 12.30.52.png (162.14 KiB) Viewed 5424 times

[Antony Lewis]

CAMB doesn't have a built-in way to get Cl for a single redshift (except for 21cm). You can use a narrow window function.