# The gains in obs_test's amplifier table appear to be incorrect

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## Details

• Type: Bug
• Status: Invalid
• Resolution: Done
• Fix Version/s: None
• Component/s:
• Labels:
None
• Templates:
• Story Points:
4
• Sprint:
Science Pipelines DM-W16-1, Science Pipelines DM-W16-2
• Team:

## Description

As of DM-3792 the gains in obs_test's camera's amplifier table were set to the values reported in the headers of the lsstSim raw data used to generate obs_test's raw data. (Before that one nominal gain was used for all amplifiers).

However, Robert Lupton reports that these gains are incorrect. He measured the following gains by scaling the nominal gains by the median values in the bias-subtracted data:

 amp meas curr name gain gain 00 1.7741 1.7741 01 1.8998 1.65881 10 1.8130 1.74151 11 1.8903 1.67073 

We could simply adopt these values, but I would like to understand why the gains are so far off from those reported by phoSim in the raw data.

## People

• Assignee:
Simon Krughoff
Reporter:
Russell Owen
Watchers:
Paul Price, Robert Lupton, Russell Owen