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  1. DRP 2-D Pipeline
  2. PIPE2D-1267

Updating n-arm DetectorMaps leads to silent problems

    Details

    • Type: Story
    • Status: Done (View Workflow)
    • Priority: Normal
    • Resolution: Done
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
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      Description

      For this reduction, using

      reduceExposure.py /work/drp --calib /work/drp/CALIB --rerun rhl/eng-2023-07 -c isr.doFlat=False isr.doFlatNir=False doAdjustDetectorMap=True doMeasureLines=False --id visit=97083 arm=b^r^n spectrograph=1^3
      

      all 6 arms "succeeded", and br look fine, but here is a part of the 1200 n-band spectra image.

      Among other weirdnesses (the lines should all be straight and vertical), It looks as if something happens at the centre of the n1 chip. The HgCdTe detectors are monolithic, unlike the CCDs, so all the pixels should be solved together. I'm not sure that that's what's going on, though. Even in the optical the only thing that the two CCDs can do is differ by an affine transformation (or actually probably only a translation/rotation/scale).

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            rhl rhl added a comment -

            Visit 97137 shows the same problem.  It seems to be generic

            Show
            rhl rhl added a comment - Visit 97137 shows the same problem.  It seems to be generic
            Hide
            price price added a comment -

            I believe this is due to the fitDetectorMap module always treating the left and right sides of the detector separately.

            Show
            price price added a comment - I believe this is due to the fitDetectorMap module always treating the left and right sides of the detector separately.
            Hide
            rhl rhl added a comment -

            Merged to master. But note that PIPE2D-1271 suggests that there are regressions in the optical bands.

            Show
            rhl rhl added a comment - Merged to master. But note that PIPE2D-1271 suggests that there are regressions in the optical bands.

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              • Assignee:
                price price
                Reporter:
                rhl rhl
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                  Updated:
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