Details
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Type:
Bug
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Status: Done
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Resolution: Done
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Fix Version/s: None
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Component/s: obs_lsst
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Labels:
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Story Points:3
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Epic Link:
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Team:Telescope and Site
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Urgent?:No
Description
The gain values for corner wavefront sensor amplifiers are the same for intra and extra-focal parts in LsstCam (obs_lsst version
19.0.0-110-ga0aedc1+4ecf52c8e0, w2020_48 ) :
from lsst.obs.lsst import LsstCam |
camera = LsstCam().getCamera()
|
detectorExtra = camera.get('R00_SW0') |
detectorIntra = camera.get('R00_SW1') |
for amp in detectorExtra : |
print(amp.getName(), amp.getGain())
|
for amp in detectorIntra : |
print(amp.getName(), amp.getGain())
|
yields
C10 1.679 |
C11 1.738 |
C12 1.584 |
C13 1.689 |
C14 1.782 |
C15 1.788 |
C16 1.596 |
C17 1.725 |
|
|
C10 1.679 |
C11 1.738 |
C12 1.584 |
C13 1.689 |
C14 1.782 |
C15 1.788 |
C16 1.596 |
C17 1.725 |
They used to be different, as in PhosimMapper:
from lsst.obs.lsst.phosim import PhosimMapper |
camera = PhosimMapper().camera
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detector = camera.get('R00_S22') |
for amp in detector : |
print(amp.getName(), amp.getGain())
|
yields
C10 1.66 |
C11 1.737 |
C12 1.804 |
C13 1.753 |
C14 1.712 |
C15 1.653 |
C16 1.619 |
C17 1.671 |
|
|
C07 1.679 |
C06 1.738 |
C05 1.584 |
C04 1.689 |
C03 1.782 |
C02 1.788 |
C01 1.596 |
C00 1.725 |
The C00:C07 in PhosimMapper are SW1, intra-focal, and C10:C17 are SW0, extra-focal. The makeGainImages.py used to make calibration files for PhoSim depends on these values to be the same between the mapper and the segmentation.txt used by PhoSim to determine amplifier gain.