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  1. Data Management
  2. DM-6467

Account for noise replacement differences between LSST and HSC

    Details

    • Type: Story
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      In DM-5827, Bob Armstrong wrote:

      In most of these plots you can see some scatter at relatively bright magnitudes... These are likely getting different pixel values when we replace objects with noise which is causing these changes.

      Check that this is the case, and, if so, explain why the noise replacement is different.

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            swinbank John Swinbank created issue -
            swinbank John Swinbank made changes -
            Field Original Value New Value
            Epic Link DM-5399 [ 23206 ]
            swinbank John Swinbank made changes -
            Link This issue relates to DM-5827 [ DM-5827 ]
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            rearmstr Bob Armstrong added a comment -

            On the LSST side, the random number seed that is used for noise replacement includes the id of the exposure. This explains why the measurements for blended objects are different.

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            rearmstr Bob Armstrong added a comment - On the LSST side, the random number seed that is used for noise replacement includes the id of the exposure. This explains why the measurements for blended objects are different.
            rearmstr Bob Armstrong made changes -
            Resolution Done [ 10000 ]
            Status To Do [ 10001 ] Done [ 10002 ]

              People

              • Assignee:
                rearmstr Bob Armstrong
                Reporter:
                swinbank John Swinbank
                Watchers:
                Bob Armstrong, John Swinbank, Lauren MacArthur
              • Votes:
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                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved:

                  Summary Panel