Feature: EventWeighter

[kosack]

This is part of the DL2 code refactoring (see #2919). It introduces a new Component hierachy ctapipe.irf.EventWeighter that has different implementations of spectral event weighting:

• SimpleEventWeigher: spectral weigting for the full FOV
• RadialEventWeighter: spectral weighing in radial bins in the FOV

They operate on a pre-processed table of DL2 information, where you specify the energy and FOV coordinate columns to use. The interface is as follows, :

from astropy.table import QTable

from ctapipe.irf import (
    RadialEventWeighter,
    spectrum_from_name,
    spectrum_from_simulation_config,
)

table = QTable(
    dict(
        true_energy=[1.0, 2.0, 0.5, 0.2] * u.TeV,
        true_fov_offset=[0.1, 1.2, 2.2, 3.2] * u.deg,
    )
)
weighter = RadialEventWeighter(
    source_spectrum=spectrum_from_name("IRFDOC_ELECTRON_SPECTRUM"),
    target_spectrum_name="CRAB_HEGRA",
    fov_offset_max=5.0*u.deg,
    fov_offset_n_bins=5,
  )

print(weighter.fov_offset_bins)
table_with_weights = weighter(table)

[ctao-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
88.9% Coverage on New Code
0.0% Duplication on New Code

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