make_map_background_irf#

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

bkgBackground3D

Background rate model

geomWcsGeom

Reference geometry

oversampling: int

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

use_region_center: bool

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

Returns
backgroundWcsNDMap

Background predicted counts sky cube in reco energy