Adding higher res delensing "band"
Mar 28 2017, Clem Pryke
The standard 01.00 maps. assume only low res (small aperture) data and include realizations where delensing is faked by turning down A_L.
Eventually we need to switch to doing real delensing. For small/large aperture hybrid experiment this would be done by extracting the lensing potential from the high res data.
In this posting I therefore play around with adding an additional 155GHz band with higher resolution. I left the white noise level the same and simply jacked the 1/f knee up to 200 (500 for T), and set the ellmin to 100. I arbitrarily set the beam size to 4 arcmin.
Due to the smaller field of view large aperture experiments can have a much smaller edge region to the map so I generate a relative hits map which is flat to r=22 with a 3deg taper:
This leads to the noisy edge being much narrower:
And the combined map is LCDM dominated nearly all over:
Taking the spectra we see as expected: the beam rolloff is at higher ell, and the ell cutoff & ell knee are higher. (I actually took these spectra using the softer edge mask to reduce what looked like E/B mixing.)