def test_instrument_model(make_data_path):
"""Check the full response model"""
from sherpa.astro import xspec
s = Session()
s.load_pha(make_data_path('3c273.pi'))
a1 = xspec.XSpowerlaw()
m1 = xspec.XSwabs()
s.set_source(m1 * a1)
src = s.get_source()
mdl = s.get_model()
assert src.ndim == 1
assert mdl.ndim == 1
def psf_fixture(request):
configuration = request.param
fixture_data = make_images(configuration)
ui = Session()
ui.set_data(1, fixture_data.image)
exact_expected_sigma = configuration.source_sigma
approx_expected_sigma = approx(exact_expected_sigma, rel=3e-2)
# Set the source model as a 2D Gaussian, and set the PSF in Sherpa
source_position = configuration.source_position
sherpa_source = SigmaGauss2D('source')
sherpa_source.ampl = configuration.source_amplitude
sherpa_source.sigma_a = exact_expected_sigma
sherpa_source.sigma_b = exact_expected_sigma
sherpa_source.xpos = source_position
sherpa_source.ypos = source_position
ui.set_source(sherpa_source)
ui.set_psf(fixture_data.psf_model)
return ui, sherpa_source, approx_expected_sigma
