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  1. Data Management
  2. DM-4322

Amplifier readout noise set to crazy values for some old CFHT images

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      Description

      In cfhtIsrTask.py the readout noise for amp A and amp B is set from the values stored in the raw image fits header identified by the keywords RDNOISEA and RDNOISEB. Typically the noise level is ~5 electrons. For some old CFHT images acquired in 2004, RDNOISEA/B is equal to 65535. In these cases, the parameter identified by the keyword RDNOISE is nevertheless correct.

      cfhtIsrTask.py should be modified to use RDNOISE instead of RDNOISEA/B when this situation happens.

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          boutigny Dominique Boutigny created issue -
          boutigny Dominique Boutigny made changes -
          Field Original Value New Value
          Reviewers Simon Krughoff [ krughoff ]
          Status To Do [ 10001 ] In Review [ 10004 ]
          krughoff Simon Krughoff made changes -
          Status In Review [ 10004 ] Reviewed [ 10101 ]
          swinbank John Swinbank made changes -
          Resolution Done [ 10000 ]
          Status Reviewed [ 10101 ] Done [ 10002 ]
          tjenness Tim Jenness made changes -
          Labels SciencePipelines

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            Assignee:
            boutigny Dominique Boutigny
            Reporter:
            boutigny Dominique Boutigny
            Reviewers:
            Simon Krughoff
            Watchers:
            Dominique Boutigny, John Swinbank, Simon Krughoff
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            Watchers:
            3 Start watching this issue

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              Updated:
              Resolved:

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