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  1. Data Management
  2. DM-20558

Investigate rescaling the coadd variances for difference imaging templates

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    Details

    • Story Points:
      8
    • Sprint:
      AP F19-1, AP F19-4 (2H September), AP F19-5 (October), AP F19-6 (November)
    • Team:
      Alert Production

      Description

      Yusra AlSayyad identified in the June '19 False Positive Sprint that the variances were wrong by 10-15% (
      https://nbviewer.jupyter.org/github/yalsayyad/dm_notebooks/blob/master/examples/DiaSourceCensusCcdVisitNight-HSC-RC2.ipynb). This is likely due to pixel covariances introduced by coaddition and warping. This ticket is to investigate rescaling the variances appropriately with ScaleVariance.

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            ebellm Eric Bellm created issue -
            ebellm Eric Bellm made changes -
            Field Original Value New Value
            Description [~yusra] identified in the June '19 False Positive Sprint that the variances were wrong by 10-15% (
            https://nbviewer.jupyter.org/github/yalsayyad/dm_notebooks/blob/master/examples/DiaSourceCensusCcdVisitNight-HSC-RC2.ipynb). This is likely due to pixel covariances introduced by coaddition and warping. This ticket is to investigate rescaling the variances appropriately.
            [~yusra] identified in the June '19 False Positive Sprint that the variances were wrong by 10-15% (
            https://nbviewer.jupyter.org/github/yalsayyad/dm_notebooks/blob/master/examples/DiaSourceCensusCcdVisitNight-HSC-RC2.ipynb). This is likely due to pixel covariances introduced by coaddition and warping. This ticket is to investigate rescaling the variances appropriately with {{ScaleVariance}}.
            swinbank John Swinbank made changes -
            Sprint AP F19-1 [ 923 ]
            swinbank John Swinbank made changes -
            Sprint AP F19-1 [ 923 ] AP F19-1, AP F19-2 [ 923, 940 ]
            swinbank John Swinbank made changes -
            Epic Link DM-19977 [ 307523 ]
            swinbank John Swinbank made changes -
            Sprint AP F19-1, AP F19-2 [ 923, 940 ] AP F19-1, AP F19-3 [ 923, 941 ]
            swinbank John Swinbank made changes -
            Rank Ranked lower
            swinbank John Swinbank made changes -
            Sprint AP F19-1, AP F19-3 (Skipped) [ 923, 941 ] AP F19-1, AP F19-4 (2H September) [ 923, 956 ]
            swinbank John Swinbank made changes -
            Rank Ranked higher
            swinbank John Swinbank made changes -
            Epic Link DM-19977 [ 307523 ] DM-21443 [ 423050 ]
            swinbank John Swinbank made changes -
            Sprint AP F19-1, AP F19-4 (2H September) [ 923, 956 ] AP F19-1, AP F19-4 (2H September), AP F19-5 (October) [ 923, 956, 957 ]
            gkovacs Gabor Kovacs made changes -
            Status To Do [ 10001 ] In Progress [ 3 ]
            ebellm Eric Bellm made changes -
            Sprint AP F19-1, AP F19-4 (2H September), AP F19-5 (October) [ 923, 956, 957 ] AP F19-1, AP F19-4 (2H September), AP F19-5 (October), AP F19-6 (November) [ 923, 956, 957, 958 ]
            gkovacs Gabor Kovacs made changes -
            gkovacs Gabor Kovacs made changes -
            Attachment imgD_noScaleVar_2019-11-14.log [ 41270 ]
            Attachment imgD_scaleVar_2019-11-14.log [ 41271 ]
            gkovacs Gabor Kovacs made changes -
            Attachment imgD_scaleVariance_2019-11-13.py [ 41272 ]
            gkovacs Gabor Kovacs made changes -
            Reviewers Yusra AlSayyad [ yusra ]
            Status In Progress [ 3 ] In Review [ 10004 ]
            yusra Yusra AlSayyad made changes -
            Attachment HSC plot.png [ 41300 ]
            yusra Yusra AlSayyad made changes -
            Status In Review [ 10004 ] Reviewed [ 10101 ]
            gkovacs Gabor Kovacs made changes -
            Resolution Done [ 10000 ]
            Status Reviewed [ 10101 ] Done [ 10002 ]
            swinbank John Swinbank made changes -
            Link This issue is triggering DM-22396 [ DM-22396 ]
            ebellm Eric Bellm made changes -
            Remote Link This issue links to "Page (Confluence)" [ 25314 ]
            ebellm Eric Bellm made changes -
            Remote Link This issue links to "Page (Confluence)" [ 25435 ]

              People

              Assignee:
              gkovacs Gabor Kovacs
              Reporter:
              ebellm Eric Bellm
              Reviewers:
              Yusra AlSayyad
              Watchers:
              Eric Bellm, Gabor Kovacs, John Swinbank, Paul Price, Yusra AlSayyad
              Votes:
              0 Vote for this issue
              Watchers:
              5 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved: