first try at getting lensed CMB maps in

[ajvanengelen]

This is a tweak of a similar implementation in actsims https://github.com/ACTCollaboration/actsims/blob/96f4b98d9e580c33fb73f1334f476817b0286782/actsims/simTools.py#L24

This is just draft code and has not been tested! But we (Mat and Alex) are submitting it for a first review.

It is decoupled from the actsims repo but by default will load up the same lensed alm's.

[zonca]

Well done! Thanks for contributing this

Please let's try to make meaningful commit messages, also, try to consolidate commits before pushing with something like git rebase -i HEAD~10

[ajvanengelen]

Indeed. Even putting aside bandpass integration for now, passing even just the central frequencies would be better than passing an integer nfreqs. In actsims I pass around lists such as [‘f150’] or [‘f090’, ‘f150’]. What will we do in mapsims?

…

On Dec 6, 2018, at 12:45 PM, Mathew S. Madhavacheril ***@***.***> wrote: @msyriac commented on this pull request. In mapsims/cmb.py <#4 (comment)>: > + returns (nfreqs,ncomp,Ny,Nx) rectangular pixel ndmap. + + ''' + ncomp = 3 if pol else 1 + filename = _get_cmb_map_string(cmb_dir,iteration_num,cmb_set,lensed,aberrated) + #The hdu = (1, 2,3) means get all of T, E, B + #Note the alm's are stored as complex32, so upgrade this for processing + alm_teb = np.complex128(hp.fitsfunc.read_alm(filename, hdu = (1,2,3) if pol else 1)) + #Here we can multiply the alms by the appropriate beam; + #hp.sphtfunc.almxfl can be used. Not included yet. Once we + #do, we will have to call the inverse SHT nfreqs times, as in actsims. + if nside is not None: + #Then we are outputting a healpix map + map_tqu = hp.alm2map(alm_teb, nside) + output = np.tile(map_tqu, (nfreqs, 1, 1)) # if nfreqs>1 else map_tqu + #Here we want to multiply the map by the modulation factor. FIXME: not implemented yet So instead of nfreqs, we'll need some way to specify the frequency bandpasses in the interface to this function right? Should we go with some effective central frequency? Or do we want to do a bandpass integration? What will PySM be doing? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#4 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/APAXHDMLYVBDTYsJrTDDJfo0bigj7MFhks5u2VfEgaJpZM4ZFxor>.

[msyriac]

I've made a first pass at integrating mapsims.cmb and so_pysm_models.alms. Could you have a look?

[msyriac]

@ajvanengelen I've put a placeholder for modulation here: https://github.com/msyriac/so_pysm_models/blob/precomputed_alms_with_car/so_pysm_models/alms.py#L64

[zonca]

it looks good, I tried to fix tests on Travis, let's see if it worked once the Travis tests complete

[zonca]

thanks @msyriac !