{"action":"created","issue":{"url":"https://api.github.com/repos/wmorning/EvilLens/issues/41","repository_url":"https://api.github.com/repos/wmorning/EvilLens","labels_url":"https://api.github.com/repos/wmorning/EvilLens/issues/41/labels{/name}","comments_url":"https://api.github.com/repos/wmorning/EvilLens/issues/41/comments","events_url":"https://api.github.com/repos/wmorning/EvilLens/issues/41/events","html_url":"https://github.com/wmorning/EvilLens/issues/41","id":58387056,"node_id":"MDU6SXNzdWU1ODM4NzA1Ng==","number":41,"title":"simulated data needs to include realistic observational 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Evil","description":"Tests of observational systematic errors and their effects on substructure sensitivity.","creator":{"login":"wmorning","id":8930613,"node_id":"MDQ6VXNlcjg5MzA2MTM=","avatar_url":"https://avatars2.githubusercontent.com/u/8930613?v=4","gravatar_id":"","url":"https://api.github.com/users/wmorning","html_url":"https://github.com/wmorning","followers_url":"https://api.github.com/users/wmorning/followers","following_url":"https://api.github.com/users/wmorning/following{/other_user}","gists_url":"https://api.github.com/users/wmorning/gists{/gist_id}","starred_url":"https://api.github.com/users/wmorning/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/wmorning/subscriptions","organizations_url":"https://api.github.com/users/wmorning/orgs","repos_url":"https://api.github.com/users/wmorning/repos","events_url":"https://api.github.com/users/wmorning/events{/privacy}","received_events_url":"https://api.github.com/users/wmorning/received_events","type":"User","site_admin":false},"open_issues":4,"closed_issues":3,"state":"open","created_at":"2015-09-15T22:52:47Z","updated_at":"2018-11-16T23:44:21Z","due_on":null,"closed_at":null},"comments":6,"created_at":"2015-02-20T17:51:10Z","updated_at":"2018-11-16T23:44:21Z","closed_at":"2018-11-16T23:44:21Z","author_association":"COLLABORATOR","body":"Hi Warren! Phil's here visiting today, and we are chatting about the ALMA data, and potential problems with it.\n\nThere are three effects I think we need to worry about, amplitude errors, phase gain errors and decoherence. The first two are antenna-based effects, and the phase errors have previously been dealt with in the Cycle 0 lens fitting. The decoherence is a baseline-based corruption and will suppress the visibility amplitude on the longest baselines. This is effectively reducing the high-spatial frequency structure in the maps, precisely the signature of DM substructure. We should probably simulate this in the data and see what it does. \n\nIt seems likely that we can add this effect to uncorrupted simulations of ALMA data, because CASA probably doesn't include these effects. \n\nCan you assign this issue to me, and I will get back to you with a suitable reference for the atmospheric structure function, so that you can simulate it in a realistic manner?\n\nDan\n"},"comment":{"url":"https://api.github.com/repos/wmorning/EvilLens/issues/comments/439562233","html_url":"https://github.com/wmorning/EvilLens/issues/41#issuecomment-439562233","issue_url":"https://api.github.com/repos/wmorning/EvilLens/issues/41","id":439562233,"node_id":"MDEyOklzc3VlQ29tbWVudDQzOTU2MjIzMw==","user":{"login":"wmorning","id":8930613,"node_id":"MDQ6VXNlcjg5MzA2MTM=","avatar_url":"https://avatars2.githubusercontent.com/u/8930613?v=4","gravatar_id":"","url":"https://api.github.com/users/wmorning","html_url":"https://github.com/wmorning","followers_url":"https://api.github.com/users/wmorning/followers","following_url":"https://api.github.com/users/wmorning/following{/other_user}","gists_url":"https://api.github.com/users/wmorning/gists{/gist_id}","starred_url":"https://api.github.com/users/wmorning/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/wmorning/subscriptions","organizations_url":"https://api.github.com/users/wmorning/orgs","repos_url":"https://api.github.com/users/wmorning/repos","events_url":"https://api.github.com/users/wmorning/events{/privacy}","received_events_url":"https://api.github.com/users/wmorning/received_events","type":"User","site_admin":false},"created_at":"2018-11-16T23:44:21Z","updated_at":"2018-11-16T23:44:21Z","author_association":"OWNER","body":"We have phase errors, amplitude errors, and decorrelation built in.  "}}
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