Supergalactic¶
-
class
astropy.coordinates.
Supergalactic
(*args, copy=True, representation_type=None, differential_type=None, **kwargs)[source] [edit on github]¶ Bases:
astropy.coordinates.BaseCoordinateFrame
Supergalactic Coordinates (see Lahav et al. 2000, <http://adsabs.harvard.edu/abs/2000MNRAS.312..166L>, and references therein).
Parameters: - data :
BaseRepresentation
subclass instance A representation object or
None
to have no data (or use the coordinate component arguments, see below).- sgl :
Angle
, optional, must be keyword The supergalactic longitude for this object (
sgb
must also be given andrepresentation
must be None).- sgb :
Angle
, optional, must be keyword The supergalactic latitude for this object (
sgl
must also be given andrepresentation
must be None).- distance :
Quantity
, optional, must be keyword The Distance for this object along the line-of-sight.
- pm_sgl_cossgb :
Quantity
, optional, must be keyword The proper motion in Right Ascension for this object (
pm_sgb
must also be given).- pm_sgb :
Quantity
, optional, must be keyword The proper motion in Declination for this object (
pm_sgl_cossgb
must also be given).- radial_velocity :
Quantity
, optional, must be keyword The radial velocity of this object.
- representation_type :
BaseRepresentation
subclass, str, optional A representation class or string name of a representation class. This sets the expected input representation class, thereby changing the expected keyword arguments for the data passed in. For example, passing
representation_type='cartesian'
will make the classes expect position data with cartesian names, i.e.x, y, z
in most cases.- differential_type :
BaseDifferential
subclass, str, dict, optional A differential class or dictionary of differential classes (currently only a velocity differential with key ‘s’ is supported). This sets the expected input differential class, thereby changing the expected keyword arguments of the data passed in. For example, passing
differential_type='cartesian'
will make the classes expect velocity data with the argument namesv_x, v_y, v_z
.- copy : bool, optional
If
True
(default), make copies of the input coordinate arrays. Can only be passed in as a keyword argument.
Attributes Summary
default_differential
default_representation
frame_specific_representation_info
name
Attributes Documentation
-
default_differential
¶
-
default_representation
¶
-
frame_specific_representation_info
¶
-
name
= 'supergalactic'¶
- data :