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  1. Data Management
  2. DM-5695

Implement simple 1D DCR correction on simulated data

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    • Type: Story
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: Science Pipelines
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      Description

      Nate Lust wrote a simple DCR correction recipe that runs in 1D in an ipython notebook. This ticket is to re-write the notebook in python modules that can be run on StarFast simulated images prior to image differencing. For this ticket, the simulated images will be 2D, but DCR will be purely along the x or y pixel grid, allowing columns or rows of pixels to be treated separately in 1D.

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            sullivan Ian Sullivan added a comment -

            An initial trial implementation of Nate Lust's DCR ipython notebook that has been extended to work on exposures can be found here:
            https://github.com/lsst-dm/experimental_DCR/tree/nl_dcr_trial
            This code will need to be refactored, but it does appear to reduce dipoles in difference imaging. However, it also introduces new artifacts (fainter than the dipoles). It needs to be investigated whether these artifacts are inherent to this approach or are a bug.
            Future work will include the code refactoring, and creating template exposures.

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            sullivan Ian Sullivan added a comment - An initial trial implementation of Nate Lust's DCR ipython notebook that has been extended to work on exposures can be found here: https://github.com/lsst-dm/experimental_DCR/tree/nl_dcr_trial This code will need to be refactored, but it does appear to reduce dipoles in difference imaging. However, it also introduces new artifacts (fainter than the dipoles). It needs to be investigated whether these artifacts are inherent to this approach or are a bug. Future work will include the code refactoring, and creating template exposures.

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              • Assignee:
                sullivan Ian Sullivan
                Reporter:
                sullivan Ian Sullivan
                Watchers:
                Ian Sullivan, Simon Krughoff
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                  Updated:
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