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

If geom is a RegionGeom, whether to just consider the values at the region center or the instead the sum over the whole region

obstimeTime

Observation time to use

Returns
backgroundWcsNDMap

Background predicted counts sky cube in reco energy