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  1. Data Management
  2. DM-4515

Flag out the glowing edges of DECam CCDs

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    Details

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

      Pixels near the edges of the DECam CCDs are bigger/brighter and correcting them is not trivial. One way to move forward is to mask them out.

      DESDM and CP mask 15 pixels on each edge. The cut was later raised to 25 pixels, with the inner 10 pixels flagged as SUSPECT.

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          hchiang2 Hsin-Fang Chiang added a comment -

          My original thought was to just set masks for the edge pixels in the ISR processing, so those pixels can be easily excluded in later processing. In the verification datasets meeting yesterday it was discussed that it would be good to handle them like defects.

          Show
          hchiang2 Hsin-Fang Chiang added a comment - My original thought was to just set masks for the edge pixels in the ISR processing, so those pixels can be easily excluded in later processing. In the verification datasets meeting yesterday it was discussed that it would be good to handle them like defects.
          Hide
          hchiang2 Hsin-Fang Chiang added a comment -

          Code changes are merged in DM-4559.

          For now I set the default config of isr.numEdgeSuspect to 35. That is 10 pixels more than the DESDM.

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          hchiang2 Hsin-Fang Chiang added a comment - Code changes are merged in DM-4559 . For now I set the default config of isr.numEdgeSuspect to 35. That is 10 pixels more than the DESDM.
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          hchiang2 Hsin-Fang Chiang added a comment - - edited

          A script is also added to obs_decam/example to output the defects in text-based format. The script may be a starting point if in the future we decide to refactor and persist defects in text-based format, Footprints, etc in obs_decam (also see DM-4559).

          Show
          hchiang2 Hsin-Fang Chiang added a comment - - edited A script is also added to obs_decam/example to output the defects in text-based format. The script may be a starting point if in the future we decide to refactor and persist defects in text-based format, Footprints, etc in obs_decam (also see DM-4559 ).

            People

            Assignee:
            hchiang2 Hsin-Fang Chiang
            Reporter:
            hchiang2 Hsin-Fang Chiang
            Watchers:
            Hsin-Fang Chiang
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              Updated:
              Resolved:

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