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geminiplanetimager / gpi_pipeline

Gemini Planet Imager Data Reduction Pipeline
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add 'aperture polarimetry for polarized standard stars' primitive? #79

Closed dsavransky closed 7 years ago

dsavransky commented 7 years ago

This would be nice to have as a pipeline primitive.

Would require some atypical transformations of data cubes as discussed on skype by Mike, Max, and Marshall - e.g. we could do aperture polarimetry on one of the 2D images, then replace the datacube values with a uniform intensity of the appropriate level. This would let us run the data through the rest of the polarimetry primitives without being limited by the time-variable seeing PSF. TBD what the best way to do this is.

dsavransky commented 7 years ago

Recovering rm journals for issue:

mperrin: This issue is very stale and should be updated. Is it still relevant? We should come up with a standard recipe for reducing polarization standard stars, particularly if we are expecting Gemini to start taking them on a semi-regular basis as part of baseline calibrations (which so far they have not been doing.)

mperrin: I would like to close this stale issue. Anyone object?

There's definitely room for being more systematic about how we calibrate instrumental polarization but I don't think this issue from 18 months ago is it.