SuperGalacticCoordinates¶
- class sofia_redux.scan.coordinate_systems.super_galactic_coordinates.SuperGalacticCoordinates(coordinates=None, unit='degree', copy=True)[source]¶
Bases:
CelestialCoordinates
Initialize a set of super-galactic coordinates.
The super-galactic coordinates reference the plane of the local super-cluster of galaxies as observed from Earth. The super-galactic plane intersects with the galactic plane at (137.37, 0) degrees in galactic coordinates, and the super-galactic pole is at (47.37, 6.32) degrees in galactic coordinates.
- Parameters:
- coordinateslist or tuple or array-like or units.Quantity, optional
The coordinates used to populate the object during initialization. The first (0) value or index should represent longitudinal coordinates, and the second should represent latitude.
- unitunits.Unit or str, optional
The angular unit for the coordinates. The default is ‘degree’.
- copybool, optional
Whether to explicitly perform a copy operation on the input coordinates when storing them into these coordinates. Note that it is extremely unlikely for the original coordinates to be passed in as a reference due to the significant checks performed on them.
Attributes Summary
Return an equatorial pole.
Return the string prefix for latitude (DEC).
Return the string prefix for longitude (RA).
Return the two-letter code for the coordinate system.
Methods Summary
copy
()Return a copy of the super-galactic coordinates.
edit_header
(header, key_stem[, alt])Edit the header with super-galactic coordinate information.
Return the equatorial pole.
Return the zero longitude value.
Setup the system for the coordinates.
Attributes Documentation
- EQUATORIAL_POLE = RA=18h54m53.40242832s DEC=15d38m54.0646036s (J2000.0) <sofia_redux.scan.coordinate_systems.equatorial_coordinates.EquatorialCoordinates object>¶
- GALACTIC_POLE = LON=47d22m12s LAT=6d19m12s <sofia_redux.scan.coordinate_systems.galactic_coordinates.GalacticCoordinates object>¶
- GALACTIC_ZERO = LON=137d22m12s LAT=0d00m00s <sofia_redux.scan.coordinate_systems.galactic_coordinates.GalacticCoordinates object>¶
- equatorial_pole¶
Return an equatorial pole.
- Returns:
- poleEquatorialCoordinates
- fits_latitude_stem¶
Return the string prefix for latitude (DEC).
- Returns:
- str
- fits_longitude_stem¶
Return the string prefix for longitude (RA).
- Returns:
- str
- two_letter_code¶
Return the two-letter code for the coordinate system.
- Returns:
- str
Methods Documentation
- edit_header(header, key_stem, alt='')[source]¶
Edit the header with super-galactic coordinate information.
- Parameters:
- headerastropy.io.fits.header.Header
The header to modify.
- key_stemstr
The name of the header key to update.
- altstr, optional
The alternative coordinate system.
- Returns:
- None
- classmethod get_equatorial_pole()[source]¶
Return the equatorial pole.
- Returns:
- poleEquatorialCoordinates