def make_psf_map_obs(geom, obs):
exposure_map = make_map_exposure_true_energy(
geom=geom.squash(axis="theta"),
pointing=obs.pointing_radec,
aeff=obs.aeff,
livetime=obs.observation_live_time_duration,
)
psf_map = make_psf_map(
geom=geom, psf=obs.psf, pointing=obs.pointing_radec, exposure_map=exposure_map
)
return psf_map
def test_containment_radius_map():
psf = fake_psf3d(0.15 * u.deg)
pointing = SkyCoord(0, 0, unit="deg")
energy_axis = MapAxis(nodes=[0.2, 1, 2], unit="TeV", name="energy_true")
psf_theta_axis = MapAxis(nodes=np.linspace(0.0, 0.6, 30), unit="deg", name="theta")
geom = WcsGeom.create(
skydir=pointing, binsz=0.5, width=(4, 3), axes=[psf_theta_axis, energy_axis]
)
psfmap = make_psf_map(psf=psf, pointing=pointing, geom=geom)
m = psfmap.containment_radius_map(1 * u.TeV)
coord = SkyCoord(0.3, 0, unit="deg")
val = m.interp_by_coord(coord)
assert_allclose(val, 0.226477, rtol=1e-3)
def test_make_psf_map():
psf = fake_psf3d(0.3 * u.deg)
pointing = SkyCoord(0, 0, unit="deg")
energy_axis = MapAxis(
nodes=[0.2, 0.7, 1.5, 2.0, 10.0], unit="TeV", name="energy_true"
)
rad_axis = MapAxis(nodes=np.linspace(0.0, 1.0, 51), unit="deg", name="theta")
geom = WcsGeom.create(
skydir=pointing, binsz=0.2, width=5, axes=[rad_axis, energy_axis]
)
psfmap = make_psf_map(psf, pointing, geom)
assert psfmap.psf_map.geom.axes[0] == rad_axis
assert psfmap.psf_map.geom.axes[1] == energy_axis
assert psfmap.psf_map.unit == Unit("sr-1")
assert psfmap.psf_map.data.shape == (4, 50, 25, 25)
def get_psf():
filename = (
"$GAMMAPY_DATA/cta-1dc/caldb/data/cta/1dc/bcf/South_z20_50h/irf_file.fits"
)
psf = EnergyDependentMultiGaussPSF.read(filename, hdu="POINT SPREAD FUNCTION")
geom = WcsGeom.create(
skydir=(0, 0),
frame="galactic",
binsz=2,
width=(2, 2),
axes=[RAD_AXIS_DEFAULT, psf.axes["energy_true"]]
)
return make_psf_map(
psf=psf,
pointing=SkyCoord(0, 0.5, unit="deg", frame="galactic"),
geom=geom,
exposure_map=Map.from_geom(geom.squash("rad"), unit="cm2 s")
)
def make_test_psfmap(size, shape="gauss"):
psf = fake_psf3d(size, shape)
aeff2d = fake_aeff2d()
pointing = SkyCoord(0, 0, unit="deg")
energy_axis = MapAxis(
nodes=[0.2, 0.7, 1.5, 2.0, 10.0], unit="TeV", name="energy_true"
)
rad_axis = MapAxis.from_nodes(
nodes=np.linspace(0.0, 0.6, 50), unit="deg", name="theta"
)
geom = WcsGeom.create(
skydir=pointing, binsz=0.2, width=5, axes=[rad_axis, energy_axis]
)
exposure_geom = geom.squash(axis="theta")
exposure_map = make_map_exposure_true_energy(pointing, "1 h", aeff2d, exposure_geom)
return make_psf_map(psf, pointing, geom, exposure_map)
