def test_spectrum_dataset_stack_nondiagonal_no_bkg(self):
aeff = EffectiveAreaTable.from_parametrization(self.src.energy.edges,
"HESS")
edisp1 = EDispKernel.from_gauss(self.src.energy.edges,
self.src.energy.edges, 0.1, 0.0)
livetime = self.livetime
dataset1 = SpectrumDataset(counts=None,
livetime=livetime,
aeff=aeff,
edisp=edisp1,
background=None)
livetime2 = livetime
aeff2 = EffectiveAreaTable(self.src.energy.edges[:-1],
self.src.energy.edges[1:], aeff.data.data)
edisp2 = EDispKernel.from_gauss(self.src.energy.edges,
self.src.energy.edges, 0.2, 0.0)
dataset2 = SpectrumDataset(
counts=self.src.copy(),
livetime=livetime2,
aeff=aeff2,
edisp=edisp2,
background=None,
)
dataset1.stack(dataset2)
assert dataset1.counts is None
assert dataset1.background is None
assert dataset1.livetime == 2 * self.livetime
assert_allclose(dataset1.aeff.data.data.to_value("m2"),
aeff.data.data.to_value("m2"))
assert_allclose(dataset1.edisp.get_bias(1 * u.TeV), 0.0, atol=1.2e-3)
assert_allclose(dataset1.edisp.get_resolution(1 * u.TeV),
0.1581,
atol=1e-2)
def test_spectrum_dataset_stack_diagonal_safe_mask(self):
aeff = EffectiveAreaTable.from_parametrization(self.src.energy.edges,
"HESS")
edisp = EDispKernel.from_diagonal_response(self.src.energy.edges,
self.src.energy.edges)
livetime = self.livetime
dataset1 = SpectrumDataset(
counts=self.src.copy(),
livetime=livetime,
aeff=aeff,
edisp=edisp,
background=self.bkg.copy(),
)
livetime2 = 0.5 * livetime
aeff2 = EffectiveAreaTable(self.src.energy.edges[:-1],
self.src.energy.edges[1:],
2 * aeff.data.data)
bkg2 = CountsSpectrum(
self.src.energy.edges[:-1],
self.src.energy.edges[1:],
data=2 * self.bkg.data,
)
safe_mask2 = np.ones_like(self.src.data, bool)
safe_mask2[0] = False
dataset2 = SpectrumDataset(
counts=self.src.copy(),
livetime=livetime2,
aeff=aeff2,
edisp=edisp,
background=bkg2,
mask_safe=safe_mask2,
)
dataset1.stack(dataset2)
assert_allclose(dataset1.counts.data[1:], self.src.data[1:] * 2)
assert_allclose(dataset1.counts.data[0], self.src.data[0])
assert dataset1.livetime == 1.5 * self.livetime
assert_allclose(dataset1.background.data[1:], 3 * self.bkg.data[1:])
assert_allclose(dataset1.background.data[0], self.bkg.data[0])
assert_allclose(
dataset1.aeff.data.data.to_value("m2"),
4.0 / 3 * aeff.data.data.to_value("m2"),
)
assert_allclose(dataset1.edisp.pdf_matrix[1:], edisp.pdf_matrix[1:])
assert_allclose(dataset1.edisp.pdf_matrix[0],
0.5 * edisp.pdf_matrix[0])