Oct 17, 2018 - Lensing the CIB
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CIB Lensing of Individual Shells and Analysis
Here is what I was able to do.
1. Lens the 23 CIB maps with the 23 kappa maps, creating a "cib_i^lensed" and a "cib_i^unlensed" set of 23 maps.
I only used the field maps for both the kappa and the CIB maps. There were only 16 maps for the field (from z = 0 to z = 3.2). Used the bash script Remi left. The following is the part of my script that did the lensing. It turned out this was where I made a mistake before and got such high values for the fractional difference between the lensed and unlensed maps. I had been lensing a CIB map with the kappa map of the same range of z which does not make sense since a CIB shell will only be lensed by the kappa before it. For example, CIB_z_1.0_1.2 has to be lensed by Kappa_z_0.8_1.0_zsource_0.9 but I was lensing it with Kappa_z_1.0_1.2_zsource_1.1.
for i in seq 0.2 0.2 3.2;
do
echo "-----------$i----------"
zmid=`awk "BEGIN {print $i-0.1}"`
zfield=`awk "BEGIN {print $i+0.2}"`
echo "$zmid"
echo "$zfield"
python lens.py ../jason_cib_lensing/maps/kappa/field/kappa_field_nside2048_zmin0.0_zmax${i}_zsource${zmid}_kap.fits
../jason_cib_lensing/maps/cib/field/2048/unlensed_maps/cib_field_nside2048_zmin${i}_zmax${zfield}_cib.fits
../jason_cib_lensing/maps/lensed/phi/run2/kap_zmax${i}_phi_field.fits
../jason_cib_lensing/maps/lensed/field/run2/cib_field_nside2048_zmin${i}_zmax${zfield}_cib_lensed.fits -np 40
2. Plot cartview "zoom ins" of a few cib maps, lensed and unlensed, to make sure the lensing makes sense.
I tried this out for z = 1.0 to 1.2 and z = 2.0 to 2.2, the whole map and some cartviews. The scales at the bottom were synchronized between lensed and unlensed maps.
z = 1.0 to 1.2
unlensed total lensed total
There isn't a clear difference between the two maps so I subtracted the lensed map from the unlensed (linearly) and made a map out of it. I will refer to these as 'difference maps.' (It may be different from the difference maps mentioned in the last meeting.)
difference total Now there is a difference for sure.
unlensed -30º~ -60º lensed -30º~ -60º
Again, the two maps look virtually the same and these cannot be differentiated even with blinking.
difference -30º~ -60º This looks better.
The same goes for these maps even though the range is smaller.
unlensed 0º~ 20º lensed 0º~ 20º
difference 0º~ 20º
When the maps are zoomed into 5º patches, the two maps certainly display a difference even though details are blurred due to the resolution.
unlensed 35º~ 40º lensed 35º~ 40º
z = 2.0 to 2.2
unlensed total lensed total
difference total
unlensed 0º~ 20º lensed 0º~ 20º
difference 0º~ 20º
unlensed 35º~ 40º lensed 35º~ 40º
These two maps seem much different from each other compared to the 35º~40º for z = 1.0 to 1.2.
difference 35º~ 40º What luck!
3. add these 23 maps together to get a cib_total^lensed = \sum_i cib_i^lensed, and a cib_total^unlensed = \sum_i cib_i^unlensed
Used another bash script to add the maps up. It goes:
(log) Kappa map
view of a patch from 5º~10ºN, 5º~10ºE using 'cartview'
4. plot these, and also take their power spectrums and plot those just like you did for the CMB lensing (getting a delta Cl/Cl too)
(log)
5. power spectra of each of the 23 slices lensed and unlensed seperately to see whats going on