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GNIRS detector performance regained

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The issue affecting every 8th column on the top right quadrant of the detector reported in this announcement has been further investigated.

The two ADC boards that were not performing correctly have been replaced and the issue has now been fixed. The figure below shows a horizontal cut along the top right quadrant of a LR-IFU flat and demonstrates that the faulty columns are now recovered.

The temporary version of the bad pixel mask (BPM) to address the issue with the upper right quadrant (see linked announcement above) should be no longer be used with Gemini IRAF to reduce GNIRS data taken after the 22nd of April, 2024. Rather, the version of the BPM available for data taken prior to the detector issue should be used. The BPM has been already archived for DRAGONS.


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