{"action":"created","issue":{"url":"https://api.github.com/repos/legacysurvey/legacypipe/issues/253","repository_url":"https://api.github.com/repos/legacysurvey/legacypipe","labels_url":"https://api.github.com/repos/legacysurvey/legacypipe/issues/253/labels{/name}","comments_url":"https://api.github.com/repos/legacysurvey/legacypipe/issues/253/comments","events_url":"https://api.github.com/repos/legacysurvey/legacypipe/issues/253/events","html_url":"https://github.com/legacysurvey/legacypipe/issues/253","id":420132199,"node_id":"MDU6SXNzdWU0MjAxMzIxOTk=","number":253,"title":"Poor residuals around bright variable stars such as Mira","user":{"login":"djschlegel","id":7918018,"node_id":"MDQ6VXNlcjc5MTgwMTg=","avatar_url":"https://avatars0.githubusercontent.com/u/7918018?v=4","gravatar_id":"","url":"https://api.github.com/users/djschlegel","html_url":"https://github.com/djschlegel","followers_url":"https://api.github.com/users/djschlegel/followers","following_url":"https://api.github.com/users/djschlegel/following{/other_user}","gists_url":"https://api.github.com/users/djschlegel/gists{/gist_id}","starred_url":"https://api.github.com/users/djschlegel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/djschlegel/subscriptions","organizations_url":"https://api.github.com/users/djschlegel/orgs","repos_url":"https://api.github.com/users/djschlegel/repos","events_url":"https://api.github.com/users/djschlegel/events{/privacy}","received_events_url":"https://api.github.com/users/djschlegel/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":{"url":"https://api.github.com/repos/legacysurvey/legacypipe/milestones/9","html_url":"https://github.com/legacysurvey/legacypipe/milestone/9","labels_url":"https://api.github.com/repos/legacysurvey/legacypipe/milestones/9/labels","id":4082266,"node_id":"MDk6TWlsZXN0b25lNDA4MjI2Ng==","number":9,"title":"DR9","description":null,"creator":{"login":"djschlegel","id":7918018,"node_id":"MDQ6VXNlcjc5MTgwMTg=","avatar_url":"https://avatars0.githubusercontent.com/u/7918018?v=4","gravatar_id":"","url":"https://api.github.com/users/djschlegel","html_url":"https://github.com/djschlegel","followers_url":"https://api.github.com/users/djschlegel/followers","following_url":"https://api.github.com/users/djschlegel/following{/other_user}","gists_url":"https://api.github.com/users/djschlegel/gists{/gist_id}","starred_url":"https://api.github.com/users/djschlegel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/djschlegel/subscriptions","organizations_url":"https://api.github.com/users/djschlegel/orgs","repos_url":"https://api.github.com/users/djschlegel/repos","events_url":"https://api.github.com/users/djschlegel/events{/privacy}","received_events_url":"https://api.github.com/users/djschlegel/received_events","type":"User","site_admin":false},"open_issues":24,"closed_issues":27,"state":"open","created_at":"2019-02-24T15:19:12Z","updated_at":"2019-12-27T09:52:49Z","due_on":null,"closed_at":null},"comments":2,"created_at":"2019-03-12T18:07:23Z","updated_at":"2019-12-27T19:05:57Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"Anand Raichoor points out that the bright variable star Mira (o Ceti) was a cause of angular clustering problems in eboss.  This particular bright variable star is in brick 0348m030:\r\nhttp://legacysurvey.org/viewer?ra=34.8376&dec=-2.9787&zoom=12&layer=decals-dr7\r\n\r\nI don't have a good suggestion.  Possibly, we could let the (optical +WISE) flux float for each observation of a star identified as variable by Tycho or  GAIA.  GAIA has classified about one out of each 3000 of their  stars  as variable: https://arxiv.org/abs/1811.03919\r\n\r\nAlso note that this particular star was identified in Star Trek to be a source of deadly Berthold radiation.\r\n\r\n<img width=\"813\" alt=\"Screen Shot 2019-03-12 at 11 05 51 AM\" src=\"https://user-images.githubusercontent.com/7918018/54224501-e0564e80-44b6-11e9-8e0f-50e2a608de28.png\">\r\n"},"comment":{"url":"https://api.github.com/repos/legacysurvey/legacypipe/issues/comments/569327594","html_url":"https://github.com/legacysurvey/legacypipe/issues/253#issuecomment-569327594","issue_url":"https://api.github.com/repos/legacysurvey/legacypipe/issues/253","id":569327594,"node_id":"MDEyOklzc3VlQ29tbWVudDU2OTMyNzU5NA==","user":{"login":"deisenstein","id":2033818,"node_id":"MDQ6VXNlcjIwMzM4MTg=","avatar_url":"https://avatars3.githubusercontent.com/u/2033818?v=4","gravatar_id":"","url":"https://api.github.com/users/deisenstein","html_url":"https://github.com/deisenstein","followers_url":"https://api.github.com/users/deisenstein/followers","following_url":"https://api.github.com/users/deisenstein/following{/other_user}","gists_url":"https://api.github.com/users/deisenstein/gists{/gist_id}","starred_url":"https://api.github.com/users/deisenstein/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/deisenstein/subscriptions","organizations_url":"https://api.github.com/users/deisenstein/orgs","repos_url":"https://api.github.com/users/deisenstein/repos","events_url":"https://api.github.com/users/deisenstein/events{/privacy}","received_events_url":"https://api.github.com/users/deisenstein/received_events","type":"User","site_admin":false},"created_at":"2019-12-27T19:05:56Z","updated_at":"2019-12-27T19:05:56Z","author_association":"NONE","body":"I think I don't yet understand the sense of the question.\r\n\r\nIs the hope that by better knowledge of the true flux at the time of observation that we will somehow subtract the far wings of the PSF and ghosts well enough to rescue more area?  To me, that splits into at least two sets:\r\na) For the brightest stars, the wings extend a long way (including ghosts), often past the brick boundaries.  Subtracting that seems brutal: the ghosts vary with the location of the star in the field and we just don't have many examples of the brightest stars, plus the coding aspects are a pain.  So I have no particular hope of this.\r\nb) For intermediate stars known to be variable, in principle, one could allow the flux to be separately  estimate in each frame.\r\n\r\nOr perhaps the question is simply how much area to mask bright stars.  I agree that variables may need more headroom.  But for the very brightest I can't tell if our problem is the variability is our dominant problem, e.g., relative to the under-modelled ghosts.  The background estimate changes may have altered this behavior a fair bit; perhaps we have to wait for the DR9 reductions to assess this?"}}
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