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tguillemLSST committed Dec 13, 2024
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26 changes: 11 additions & 15 deletions sections/biasStability.rst
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Expand Up @@ -15,15 +15,13 @@ For the baseline acquisition configuration (see conclusion), three relevant stab

To process these runs, the eo_pipe bias stability task is used : for the ISR part, a serial ('mean_per_row') overscan correction and a bias subtraction (computed from the corresponding B-protocol run) are applied. The final data product is the mean of the per-amplifier science image over the full set of exposures of the run. Two typical examples are shown in the figures below.

.. list-table::
.. figure:: sections/figures/E2136_R21_S21.png

* - .. figure:: sections/figures/E2136_R21_S21.png
Stable case (R21 S21)

Stable case (R21 S21)
.. figure:: sections/figures/E2136_R23_S22.png

- .. figure:: sections/figures/E2136_R23_S22.png

Instable case (R23 S22)
Instable case (R23 S22)

A comparison of the results for an instable CDD is shown below for the three runs.

Expand All @@ -43,15 +41,13 @@ A comparison of the results for an instable CDD is shown below for the three run

In order to highlight the 2D shape differences, a 2D-overscan correction is applied. A few exposures illustrating the variations of the 2D shape for an instable CCD are shown below.

.. list-table::

* - .. figure:: sections/figures/E1880_bias_R33_S02.png

Bias exposure, run 1880, R33 S02
.. figure:: sections/figures/E1880_bias_R33_S02.png

- .. figure:: sections/figures/E2136_dark15_R33_S02.png
Bias exposure, run 1880, R33 S02

15-s dark exposure, run E2136 in 'stable' conditions, R33 S02
.. figure:: sections/figures/E2136_dark15_R33_S02.png

15-s dark exposure, run E2136 in 'stable' conditions, R33 S02

.. list-table::

Expand All @@ -67,10 +63,10 @@ In order to quantify the number of e2v instable amplifiers, a stability metric *

.. figure:: sections/figures/E2136_distribution_d.png

Distribution of the stability metric for the 1872 e2v amplifiers in run E2136
Distribution of the stability metric for the 1872 e2v amplifiers in run E2136

.. figure:: sections/figures/E2136_mosaic_d.png

Mosaic of e2v amplifiers identified as instable in run E2136
Mosaic of e2v amplifiers identified as instable in run E2136

Further studies are still required in order to converge on the best mitigation strategies for the start of the LSST survey.

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