make_map_background_irf#

gammapy.makers.utils.make_map_background_irf(pointing, ontime, bkg, geom, time_start, fov_rotation_step=<Quantity 1. deg>, 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) # noqa: E501

bkgBackground3D

Background rate model.

geomWcsGeom

Reference geometry.

time_startTime

Observation start time.

fov_rotation_stepQuantity

Maximum rotation error to create sub-time bins if the irf is 3D and in AltAz. Default is 1.0 deg.

oversamplingint, optional

Oversampling factor in energy, used for the background model evaluation. Default is None.

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.

Returns:

backgroundWcsNDMap

Background predicted counts sky cube in reconstructed energy.