# A look at DC4 bandpower window functions

B. Racine

Short posting to show bandpower window functions for the DC4, DC4b and DC4c cases.

## 1: Plots

In this posting, we plot the bandpower window function as computed by our S4 analysis pipeline.

Comments on the figure:

• We see that the Chile mask is the one that has the larger upturn at low-$$\ell$$.
• For the large, low frequency beams, it is a percent level contribution compared to the peak for the highest bandpower.
• The Pole case has wider window functions, but they have the least contributions at low ell.
• The circular mask is in-between.