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Status
IN PROGRESS
Stakeholders

Steven Myers Frank Schinzel Aaron Lawson Anthony Graham [X] Mark Lacy 

Outcome

We will look into improving the model.

Mark says to continue including affected data in SRDP and do not flag the data.

In comparison to the recent 3C147 model issue, we do not see ramps in amp vs freq solutions.

Include a note similar to amp ramp note:

"The current calibrator models for resolved flux density calibrators in A-configuration in CASA are created

with narrow band data. At the high frequencies of a broad band observation, this can mean that the calibrator

model does not represent the structure of the calibrator very well, leading to amplitude errors that reduce

the dynamic range of the calibrated data. This will be remedied in a future version of CASA and the pipeline."


Due date
Owner

Anthony Graham [X] 

Background

Data sets show short baselines at the end of E and W arms with high amps in the amp vs uvwave plots. Paul suggests the long baselines have too much power in comparison. Juergen suggests S band may also be affected.


Example plot from original CIPL run for 22A-012.sb41313612.eb41801998.59714.25389122685:

Same data set/plot using a model for 3C286 made at 33 GHz (slightly lower Amp values):

Same data set/plot using a model for 3C286 made at 26 GHz (same as original model):

Likely the same issue for 3C147 - plot from 20B-342.sb39244407.eb41801147.59713.02153945602:

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