RingBackgroundMaker

class gammapy.makers.RingBackgroundMaker(r_in, width, exclusion_mask=None)

Bases: object

Ring background method for cartesian coordinates.

• Step 1: apply exclusion mask

• Step 2: ring-correlate

Parameters

r_inQuantity

Inner ring radius

widthQuantity

Ring width

exclusion_maskWcsNDMap

Exclusion mask

See also

AdaptiveRingBackgroundEstimator

Methods Summary

kernel(self, image)	Ring kernel.
make_maps_off(self, dataset)	Make off maps
run(self, dataset)	Run ring background maker

Methods Documentation

kernel(self, image)

Ring kernel.

Parameters

imageWcsNDMap

Input Map

Returns

ringRing2DKernel

Ring kernel.

make_maps_off(self, dataset)

Make off maps

Parameters

datasetMapDataset

Input map dataset.

Returns

maps_offdict of WcsNDMap

Dictionary containing counts_off and acceptance_off maps.

run(self, dataset)

Run ring background maker

Parameters

datasetMapDataset

Input map dataset.

Returns

dataset_on_offMapDatasetOnOff

On off dataset.