[Data] Add Pantheon+ SNe Ia Data AstroPile

[benboyd97]

Add Pantheon+ SNe Ia Data AstroPile

Pantheon+ collects SNe Ia data from many different surveys and all the data is in the .SNANA format that we have dealt with in the yse branch. I've created the panth_sne branch that will create functions to download all the different SNe Ia survey data from Pantheon+ by reusing the code that we've already made. This is all related to issue #17.

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[benboyd97]

added DES_Y3 SNe Ia

[benboyd97]

added SNLS data

[benboyd97]

added PS1 SNe Ia data

[benboyd97]

added SWIFT SNe Ia

[tom-hehir]

Have updated build_parent sample and tested it on these datasets. Currently working on: DES Y3, SNLS Currently not working on: PS1, SWIFT (both produce same error message, seems like potentially a quick fix will be possible -- see original issue on timeseries datasets)

[tom-hehir]

added SWIFT SNe Ia

@benboyd97 some of the examples in the PS1 and swift datasets are missing the field 'SNTYPE'. I have implemented a fix to treat these as missing data, but wanted to check in with you that this is correct and we can't get hold of the SNTYPE from somewhere.

[benboyd97]

Brilliant work @tom-hehir! I think the reason SNTYPE isn't there is because these are all Typa Ia supernovae used for cosmology. You could manually add them all as 'SN Ia' yourself if you like just so we're consistent!

[tom-hehir]

Thanks Ben, will do!