Create filter_extinc runner

[raphaelshirley]

filter_extinc appears to be the one command line executable which doesn't currently have Python Runner based class. Is this something we should have or otherwise have a Python based dereddening functionality?

• I have described the purpose of the suggested change, specifying what I need the enhancement to accomplish, i.e. what problem it solves.
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[raphaelshirley]

It is called from the command line like this:

filter_extinc -c COSMOS.para -FILTER FILE filter_test.dat

See p 13 of the original documentation:

https://gitlab.lam.fr/Galaxies/LEPHARE/-/blob/master/doc/LePhare_documentation.pdf?ref_type=heads

I guess we would want a python functionality along the lines of:

output = dereden(config, fluxes,efluxes, ebv)

We had a similar function in the HELP project:

https://github.com/H-E-L-P/herschelhelp_python/blob/master/herschelhelp/filters.py#L159

[raphaelshirley]

On further reading I think I want a new filter_extinc.py file with:

class FilterExtinc(Runner):
    """Calculate the filter extinction values to be multiplied by E(B-V) based on config

    Parameters
    ----------
    config_file : `string`
    """

This can then have a function correct_extinction(filter,flux,flux_error,ebv)

[johannct]

Sure, filter_extinc did not seem important, so I did not take care about it. Certainly like the other "executable" scripts