{"action":"created","issue":{"url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/748","repository_url":"https://api.github.com/repos/GalSim-developers/GalSim","labels_url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/748/labels{/name}","comments_url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/748/comments","events_url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/748/events","html_url":"https://github.com/GalSim-developers/GalSim/issues/748","id":155327380,"number":748,"title":"Fourier-space Sqrt GSObject/SBProfile (proposed contribution)","user":{"login":"TallJimbo","id":1330720,"avatar_url":"https://avatars.githubusercontent.com/u/1330720?v=3","gravatar_id":"","url":"https://api.github.com/users/TallJimbo","html_url":"https://github.com/TallJimbo","followers_url":"https://api.github.com/users/TallJimbo/followers","following_url":"https://api.github.com/users/TallJimbo/following{/other_user}","gists_url":"https://api.github.com/users/TallJimbo/gists{/gist_id}","starred_url":"https://api.github.com/users/TallJimbo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/TallJimbo/subscriptions","organizations_url":"https://api.github.com/users/TallJimbo/orgs","repos_url":"https://api.github.com/users/TallJimbo/repos","events_url":"https://api.github.com/users/TallJimbo/events{/privacy}","received_events_url":"https://api.github.com/users/TallJimbo/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"TallJimbo","id":1330720,"avatar_url":"https://avatars.githubusercontent.com/u/1330720?v=3","gravatar_id":"","url":"https://api.github.com/users/TallJimbo","html_url":"https://github.com/TallJimbo","followers_url":"https://api.github.com/users/TallJimbo/followers","following_url":"https://api.github.com/users/TallJimbo/following{/other_user}","gists_url":"https://api.github.com/users/TallJimbo/gists{/gist_id}","starred_url":"https://api.github.com/users/TallJimbo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/TallJimbo/subscriptions","organizations_url":"https://api.github.com/users/TallJimbo/orgs","repos_url":"https://api.github.com/users/TallJimbo/repos","events_url":"https://api.github.com/users/TallJimbo/events{/privacy}","received_events_url":"https://api.github.com/users/TallJimbo/received_events","type":"User","site_admin":false},"milestone":null,"comments":3,"created_at":"2016-05-17T18:21:45Z","updated_at":"2016-05-17T22:21:36Z","closed_at":null,"body":"I'd like to implement a the Kaiser algorithm for coaddition (see [Zackay & Ofek 2015](http://adsabs.harvard.edu/abs/2015arXiv151206879Z)) within GalSim.  I think all this requires is a Fourier-space `sqrt` operator on GSObjects, since all of the other operations (autocorrection and sums) already exist.\r\n\r\n - I'm thinking the `AutoConvolve` or `AutoCorrelate` `SBProfiles` look best as as examples to start from, but I'd love any recommendations for a simple Fourier-space only operator.\r\n - `Sqrt` probably isn't an appropriate name, since it's not a sqrt in real-space.  But it's also not an operation that has a name in real space.  Any other recommendations?"},"comment":{"url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/comments/219871961","html_url":"https://github.com/GalSim-developers/GalSim/issues/748#issuecomment-219871961","issue_url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/748","id":219871961,"user":{"login":"TallJimbo","id":1330720,"avatar_url":"https://avatars.githubusercontent.com/u/1330720?v=3","gravatar_id":"","url":"https://api.github.com/users/TallJimbo","html_url":"https://github.com/TallJimbo","followers_url":"https://api.github.com/users/TallJimbo/followers","following_url":"https://api.github.com/users/TallJimbo/following{/other_user}","gists_url":"https://api.github.com/users/TallJimbo/gists{/gist_id}","starred_url":"https://api.github.com/users/TallJimbo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/TallJimbo/subscriptions","organizations_url":"https://api.github.com/users/TallJimbo/orgs","repos_url":"https://api.github.com/users/TallJimbo/repos","events_url":"https://api.github.com/users/TallJimbo/events{/privacy}","received_events_url":"https://api.github.com/users/TallJimbo/received_events","type":"User","site_admin":false},"created_at":"2016-05-17T22:21:36Z","updated_at":"2016-05-17T22:21:36Z","body":"Thanks for the excellent suggestions; copying `Deconvolve` made this really easy.  PR will be up shortly."}}