SpatialModel#

class gammapy.modeling.models.SpatialModel[source]#

Bases: ModelBase

Spatial model base class.

Attributes Summary

default_parameters

evaluation_bin_size_min

evaluation_radius

Evaluation radius.

evaluation_region

Evaluation region.

is_energy_dependent

phi_0

position

Spatial model center position as a SkyCoord.

position_error

Get 95% containment position error as EllipseSkyRegion.

position_lonlat

Spatial model center position (lon, lat) in radians and frame of the model.

Methods Summary

__call__(lon, lat[, energy])

Call evaluate method.

evaluate_geom(geom)

Evaluate model on Geom.

from_dict(data, **kwargs)

Create a spatial model from a dictionary.

from_position(position, **kwargs)

Define the position of the model using a SkyCoord.

integrate_geom(geom[, oversampling_factor])

Integrate model on Geom or RegionGeom.

plot([ax, geom])

Plot spatial model.

plot_error([ax, which, kwargs_position, ...])

Plot the errors of the spatial model.

plot_grid([geom])

Plot spatial model energy slices in a grid.

plot_interactive([ax, geom])

Plot spatial model.

plot_position_error([ax])

Plot position error.

to_dict([full_output])

Create dictionary for YAML serilisation.

Attributes Documentation

default_parameters = <gammapy.modeling.parameter.Parameters object>#
evaluation_bin_size_min#
evaluation_radius#

Evaluation radius.

evaluation_region#

Evaluation region.

is_energy_dependent#
phi_0#
position#

Spatial model center position as a SkyCoord.

position_error#

Get 95% containment position error as EllipseSkyRegion.

position_lonlat#

Spatial model center position (lon, lat) in radians and frame of the model.

Methods Documentation

__call__(lon, lat, energy=None)[source]#

Call evaluate method.

evaluate_geom(geom)[source]#

Evaluate model on Geom.

Parameters:
geomWcsGeom

Map geometry.

Returns:
mapMap

Map containing the value in each spatial bin.

classmethod from_dict(data, **kwargs)[source]#

Create a spatial model from a dictionary.

Parameters:
datadict

Dictionary containing model parameters.

kwargsdict

Keyword arguments passed to from_parameters.

classmethod from_position(position, **kwargs)[source]#

Define the position of the model using a SkyCoord.

The model will be created in the frame of the SkyCoord.

Parameters:
positionSkyCoord

Position.

Returns:
modelSpatialModel

Spatial model.

integrate_geom(geom, oversampling_factor=None)[source]#

Integrate model on Geom or RegionGeom.

Integration is performed by simple rectangle approximation, the pixel center model value is multiplied by the pixel solid angle. An oversampling factor can be used for precision. By default, this parameter is set to None and an oversampling factor is automatically estimated based on the model estimation maximal bin width.

For a RegionGeom, the model is integrated on a tangent WCS projection in the region.

Parameters:
geomWcsGeom or RegionGeom

The geom on which the integration is performed.

oversampling_factorint or None

The oversampling factor to use for integration. Default is None: the factor is estimated from the model minimal bin size.

Returns:
mapMap or gammapy.maps.RegionNDMap

Map containing the integral value in each spatial bin.

plot(ax=None, geom=None, **kwargs)[source]#

Plot spatial model.

Parameters:
axAxes, optional

Matplotlib axes. Default is None.

geomWcsGeom, optional

Geometry to use for plotting. Default is None.

**kwargsdict

Keyword arguments passed to plot().

Returns:
axAxes, optional

Matplotlib axes.

plot_error(ax=None, which='position', kwargs_position=None, kwargs_extension=None)[source]#

Plot the errors of the spatial model.

Parameters:
axAxes, optional

Matplotlib axes to plot the errors on. Default is None.

which: list of str

Which errors to plot. Available options are:

  • “all”: all the optional steps are plotted

  • “position”: plot the position error of the spatial model

  • “extension”: plot the extension error of the spatial model

kwargs_positiondict, optional

Keyword arguments passed to plot_position_error. Default is None.

kwargs_extensiondict, optional

Keyword arguments passed to plot_extension_error. Default is None.

Returns:
axAxes, optional

Matplotlib axes.

plot_grid(geom=None, **kwargs)[source]#

Plot spatial model energy slices in a grid.

Parameters:
geomWcsGeom, optional

Geometry to use for plotting. Default is None.

**kwargsdict

Keyword arguments passed to plot().

Returns:
axAxes, optional

Matplotlib axes.

plot_interactive(ax=None, geom=None, **kwargs)[source]#

Plot spatial model.

Parameters:
axAxes, optional

Matplotlib axes. Default is None.

geomWcsGeom, optional

Geom to use for plotting. Default is None.

**kwargsdict

Keyword arguments passed to plot().

Returns:
axAxes, optional

Matplotlib axes.

plot_position_error(ax=None, **kwargs)[source]#

Plot position error.

Parameters:
axAxes, optional

Matplotlib axes to plot the position error on. Default is None.

**kwargsdict

Keyword arguments passed to plot().

Returns:
axAxes, optional

Matplotlib axes.

to_dict(full_output=False)[source]#

Create dictionary for YAML serilisation.

__init__(**kwargs)[source]#
classmethod __new__(*args, **kwargs)#