Background3D

class gammapy.irf.Background3D(energy_lo, energy_hi, detx_lo, detx_hi, dety_lo, dety_hi, data, meta=None, interp_kwargs=None)

Bases: object

Background 3D.

Data format specification: bkg_3d

Parameters:

energy_lo, energy_hi : Quantity

Energy binning

detx_lo, detx_hi : Quantity

FOV coordinate X-axis binning

dety_lo, dety_hi : Quantity

FOV coordinate Y-axis binning

data : Quantity

Background rate (usually: s^-1 MeV^-1 sr^-1)

Examples

Here’s an example you can use to learn about this class:

>>> from gammapy.irf import Background3D
>>> filename = '$GAMMAPY_EXTRA/datasets/cta-1dc/caldb/data/cta//1dc/bcf/South_z20_50h/irf_file.fits'
>>> bkg_3d = Background3D.read(filename, hdu='BACKGROUND')
>>> print(bkg_3d)
Background3D
NDDataArray summary info
energy         : size =    21, min =  0.016 TeV, max = 158.489 TeV
detx           : size =    36, min = -5.833 deg, max =  5.833 deg
dety           : size =    36, min = -5.833 deg, max =  5.833 deg
Data           : size = 27216, min =  0.000 1 / (MeV s sr), max =  0.421 1 / (MeV s sr)

Attributes Summary

default_interp_kwargs

Default Interpolation kwargs for NDDataArray.

Methods Summary

from_hdulist(hdulist[, hdu])	Create from HDUList.
from_table(table)	Read from Table.
read(filename[, hdu])	Read from file.
to_fits([name])	Convert to BinTable.
to_table()	Convert to Table.

Attributes Documentation

default_interp_kwargs = {'bounds_error': False, 'fill_value': None}

Default Interpolation kwargs for NDDataArray. Extrapolate.

Methods Documentation

classmethod from_hdulist(hdulist, hdu='BACKGROUND')

Create from HDUList.

classmethod from_table(table)

Read from Table.

classmethod read(filename, hdu='BACKGROUND')

Read from file.

to_fits(name='BACKGROUND')

Convert to BinTable.

to_table()

Convert to Table.