make_map_background_irf#

gammapy.makers.utils.make_map_background_irf(pointing, ontime, bkg, geom, oversampling=None, use_region_center=True, obstime=None)[source]#

Compute background map from background IRFs.

Parameters
pointingFixedPointingInfo or SkyCoord

Observation pointing.

  • If a FixedPointingInfo is passed, FOV coordinates are properly computed.

  • If a SkyCoord is passed, FOV frame rotation is not taken into account.

ontimeQuantity

Observation ontime. i.e. not corrected for deadtime see https://gamma-astro-data-formats.readthedocs.io/en/latest/irfs/full_enclosure/bkg/index.html#notes) # noqa: E501

bkgBackground3D

Background rate model.

geomWcsGeom

Reference geometry.

oversamplingint

Oversampling factor in energy, used for the background model evaluation.

use_region_centerbool, optional

For geom as a RegionGeom. If True, consider the values at the region center. If False, average over the whole region. Default is True.

obstimeTime

Observation time to use.

Returns
backgroundWcsNDMap

Background predicted counts sky cube in reconstructed energy.