GIANTCatalogue.get_tycho2_record

giant.catalogues.giant_catalogue:

static GIANTCatalogue.get_tycho2_record(stars, ucac_directory=None, tycho_directory=None)[source]

This method can be used to retrieve the corresponding full (not GIANT) Tycho 2 records for a set of GIANT catalogue stars.

This method requires that the UCAC4 and Tycho 2 catalogues be available, and will request to download them if they are not available (which takes a long time). For a description of the columns refer to the Tycho 2 documentation.

Note that these records are not directly usable for GIANT, therefore only use this if you need the raw records yourself.

Any stars that are not available in the Tycho 2 catalogue (blended stars or stars that are too dim) will be included in the output dataframe but with NANs for all columns

Parameters:

  • stars (DataFrame) – The stars to retrieve the Tycho records for

  • ucac_directory (Path | str | None) – The directory containing the UCAC4 star catalogue files (or None to use the default)

  • tycho_directory (Path | str | None) – The directory containing the Tycho 2 star catalogue files (or None to use the default)

Returns:

The raw Tycho 2 records

Return type:

DataFrame