{"action":"created","issue":{"url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/782","repository_url":"https://api.github.com/repos/GalSim-developers/GalSim","labels_url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/782/labels{/name}","comments_url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/782/comments","events_url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/782/events","html_url":"https://github.com/GalSim-developers/GalSim/issues/782","id":168979100,"number":782,"title":"3D disk galaxy models","user":{"login":"rmandelb","id":1454906,"avatar_url":"https://avatars.githubusercontent.com/u/1454906?v=3","gravatar_id":"","url":"https://api.github.com/users/rmandelb","html_url":"https://github.com/rmandelb","followers_url":"https://api.github.com/users/rmandelb/followers","following_url":"https://api.github.com/users/rmandelb/following{/other_user}","gists_url":"https://api.github.com/users/rmandelb/gists{/gist_id}","starred_url":"https://api.github.com/users/rmandelb/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rmandelb/subscriptions","organizations_url":"https://api.github.com/users/rmandelb/orgs","repos_url":"https://api.github.com/users/rmandelb/repos","events_url":"https://api.github.com/users/rmandelb/events{/privacy}","received_events_url":"https://api.github.com/users/rmandelb/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/GalSim-developers/GalSim/labels/base%20classes","name":"base classes","color":"0b02e1"},{"url":"https://api.github.com/repos/GalSim-developers/GalSim/labels/feature%20request","name":"feature request","color":"d4c5f9"}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":10,"created_at":"2016-08-02T20:21:46Z","updated_at":"2016-08-17T14:43:05Z","closed_at":null,"body":"For some Euclid simulations, the group at Oxford (Lance Miller, Niraj Welikala) has been building 3D bulge+disk galaxies.  The bulge can be represented by GalSim already, but the 3D disk cannot be.  They model it as a disk of finite thickness when viewed edge-on, with a sech^2(z) surface brightness distribution as observed for real edge-on galaxies (the radial part of the profile is indeed exponential as you move along the disk at fixed z, so it's the sech^2(z) aspect that would be new to GalSim). Initially they did this via photon-shooting but they recently began representing it using DFTs. Lance has offered some C code that could be used to implement the 3D disk models in GalSim.  He does not plan to implement it in GalSim himself.\r\n\r\nUnlike many of our profiles, the input parameter would be the disk inclination, with the ellipticity being a derived parameter.   I'm mentioning this not as a problem, but rather as an interesting feature.\r\n\r\nAny thoughts, questions, concerns, etc.?"},"comment":{"url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/comments/240434134","html_url":"https://github.com/GalSim-developers/GalSim/issues/782#issuecomment-240434134","issue_url":"https://api.github.com/repos/GalSim-developers/GalSim/issues/782","id":240434134,"user":{"login":"brgillis","id":7204836,"avatar_url":"https://avatars.githubusercontent.com/u/7204836?v=3","gravatar_id":"","url":"https://api.github.com/users/brgillis","html_url":"https://github.com/brgillis","followers_url":"https://api.github.com/users/brgillis/followers","following_url":"https://api.github.com/users/brgillis/following{/other_user}","gists_url":"https://api.github.com/users/brgillis/gists{/gist_id}","starred_url":"https://api.github.com/users/brgillis/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/brgillis/subscriptions","organizations_url":"https://api.github.com/users/brgillis/orgs","repos_url":"https://api.github.com/users/brgillis/repos","events_url":"https://api.github.com/users/brgillis/events{/privacy}","received_events_url":"https://api.github.com/users/brgillis/received_events","type":"User","site_admin":false},"created_at":"2016-08-17T14:43:05Z","updated_at":"2016-08-17T14:43:05Z","body":"I don't have any questions right now. I've already read through the info you've linked. The only thing to note is that I don't have the ability to push my working branch to the server (unless I were to fork it). I'll either need to be added to the group I think, or just work locally.\r\n\r\nI'll check with Lance to see if he has any samples that can be used for unit tests."}}
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