Supergalactic¶
-
class
astropy.coordinates.
Supergalactic
(*args, copy=True, representation_type=None, differential_type=None, **kwargs)[source]¶ 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 unless overriden viaframe_specific_representation_info
. To see this frame’s names, check out<this frame>().representation_info
.- 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
unless overriden viaframe_specific_representation_info
. To see this frame’s names, check out<this frame>().representation_info
.- copybool, optional
If
True
(default), make copies of the input coordinate arrays. Can only be passed in as a keyword argument.
- data
Attributes Summary
Attributes Documentation
-
default_differential
¶
-
default_representation
¶
-
frame_specific_representation_info
¶
-
name
= 'supergalactic'¶