def test_compute_thresholds_from_crab_data(): """Obs read from file""" arffile = "$GAMMAPY_DATA/joint-crab/spectra/hess/arf_obs23523.fits" rmffile = "$GAMMAPY_DATA/joint-crab/spectra/hess/rmf_obs23523.fits" aeff = EffectiveAreaTable.read(arffile) edisp = EnergyDispersion.read(rmffile) thresh_lo, thresh_hi = compute_energy_thresholds( aeff=aeff, edisp=edisp, method_lo="energy_bias", method_hi="none", bias_percent_lo=10, bias_percent_hi=10, ) assert_allclose(thresh_lo.to("TeV").value, 0.9174, rtol=1e-4) assert_allclose(thresh_hi.to("TeV").value, 100.0, rtol=1e-4)
def test_EffectiveAreaTable(tmp_path, aeff): arf = aeff.to_effective_area_table(offset=0.3 * u.deg) assert_quantity_allclose(arf.data.evaluate(), arf.data.data) with mpl_plot_check(): arf.plot() arf.write(tmp_path / "tmp.fits") arf2 = EffectiveAreaTable.read(tmp_path / "tmp.fits") assert_quantity_allclose(arf.data.evaluate(), arf2.data.evaluate()) test_aeff = 0.6 * arf.max_area node_above = np.where(arf.data.data > test_aeff)[0][0] energy = arf.data.axes["energy_true"] ener_above = energy.center[node_above] ener_below = energy.center[node_above - 1] test_ener = arf.find_energy(test_aeff) assert ener_below < test_ener and test_ener < ener_above elo_threshold = arf.find_energy(0.1 * arf.max_area) assert elo_threshold.unit == "TeV" assert_allclose(elo_threshold.value, 0.554086, rtol=1e-3) ehi_threshold = arf.find_energy(0.9 * arf.max_area, emin=30 * u.TeV, emax=100 * u.TeV) assert ehi_threshold.unit == "TeV" assert_allclose(ehi_threshold.value, 53.347217, rtol=1e-3) # Test evaluation outside safe range data = [np.nan, np.nan, 0, 0, 1, 2, 3, np.nan, np.nan] energy_axis_true = MapAxis.from_energy_bounds("1 TeV", "10 TeV", nbin=9, name="energy_true") aeff = EffectiveAreaTable(data=data, energy_axis_true=energy_axis_true) vals = aeff.evaluate_fill_nan() assert vals[1] == 0 assert vals[-1] == 3
def test_EffectiveAreaTable(tmpdir, aeff): arf = aeff.to_effective_area_table(offset=0.3 * u.deg) assert_quantity_allclose(arf.data.evaluate(), arf.data.data) with mpl_plot_check(): arf.plot() filename = str(tmpdir / "effarea_test.fits") arf.write(filename) arf2 = EffectiveAreaTable.read(filename) assert_quantity_allclose(arf.data.evaluate(), arf2.data.evaluate()) test_aeff = 0.6 * arf.max_area node_above = np.where(arf.data.data > test_aeff)[0][0] energy = arf.data.axis("energy") ener_above = energy.center[node_above] ener_below = energy.center[node_above - 1] test_ener = arf.find_energy(test_aeff) assert ener_below < test_ener and test_ener < ener_above elo_threshold = arf.find_energy(0.1 * arf.max_area) assert elo_threshold.unit == "TeV" assert_allclose(elo_threshold.value, 0.554086, rtol=1e-3) ehi_threshold = arf.find_energy(0.9 * arf.max_area, emin=30 * u.TeV, emax=100 * u.TeV) assert ehi_threshold.unit == "TeV" assert_allclose(ehi_threshold.value, 53.347217, rtol=1e-3) # Test evaluation outside safe range data = [np.nan, np.nan, 0, 0, 1, 2, 3, np.nan, np.nan] energy = np.logspace(0, 10, 10) * u.TeV aeff = EffectiveAreaTable(data=data, energy_lo=energy[:-1], energy_hi=energy[1:]) vals = aeff.evaluate_fill_nan() assert vals[1] == 0 assert vals[-1] == 3
def from_ogip_files(cls, filename): """Read `~gammapy.spectrum.SpectrumDatasetOnOff` from OGIP files. BKG file, ARF, and RMF must be set in the PHA header and be present in the same folder. The naming scheme is fixed to the following scheme * PHA file is named pha_obs{name}.fits * BKG file is named bkg_obs{name}.fits * ARF file is named arf_obs{name}.fits * RMF file is named rmf_obs{name}.fits with {name} the dataset name. Parameters ---------- filename : str OGIP PHA file to read """ filename = make_path(filename) dirname = filename.parent with fits.open(filename, memmap=False) as hdulist: data = _read_ogip_hdulist(hdulist) counts = CountsSpectrum(energy_hi=data["energy_hi"], energy_lo=data["energy_lo"], data=data["data"]) phafile = filename.name try: rmffile = phafile.replace("pha", "rmf") energy_dispersion = EnergyDispersion.read(dirname / rmffile) except OSError: # TODO : Add logger and echo warning energy_dispersion = None try: bkgfile = phafile.replace("pha", "bkg") with fits.open(dirname / bkgfile, memmap=False) as hdulist: data_bkg = _read_ogip_hdulist(hdulist) counts_off = CountsSpectrum( energy_hi=data_bkg["energy_hi"], energy_lo=data_bkg["energy_lo"], data=data_bkg["data"], ) acceptance_off = data_bkg["backscal"] except OSError: # TODO : Add logger and echo warning counts_off, acceptance_off = None, None arffile = phafile.replace("pha", "arf") aeff = EffectiveAreaTable.read(dirname / arffile) mask_safe = np.logical_not(data["quality"]) return cls( counts=counts, aeff=aeff, counts_off=counts_off, edisp=energy_dispersion, livetime=data["livetime"], mask_safe=mask_safe, acceptance=data["backscal"], acceptance_off=acceptance_off, name=str(data["obs_id"]), gti=data["gti"], )
def from_ogip_files(cls, filename): """Read `~gammapy.spectrum.SpectrumDatasetOnOff` from OGIP files. BKG file, ARF, and RMF must be set in the PHA header and be present in the same folder. The naming scheme is fixed to the following scheme: * PHA file is named ``pha_obs{name}.fits`` * BKG file is named ``bkg_obs{name}.fits`` * ARF file is named ``arf_obs{name}.fits`` * RMF file is named ``rmf_obs{name}.fits`` with ``{name}`` the dataset name. Parameters ---------- filename : str OGIP PHA file to read """ filename = make_path(filename) dirname = filename.parent with fits.open(filename, memmap=False) as hdulist: counts = RegionNDMap.from_hdulist(hdulist, format="ogip") acceptance = RegionNDMap.from_hdulist(hdulist, format="ogip", ogip_column="BACKSCAL") if "GTI" in hdulist: gti = GTI(Table.read(hdulist["GTI"])) else: gti = None mask_safe = RegionNDMap.from_hdulist(hdulist, format="ogip", ogip_column="QUALITY") mask_safe.data = np.logical_not(mask_safe.data) phafile = filename.name try: rmffile = phafile.replace("pha", "rmf") kernel = EDispKernel.read(dirname / rmffile) edisp = EDispKernelMap.from_edisp_kernel(kernel, geom=counts.geom) except OSError: # TODO : Add logger and echo warning edisp = None try: bkgfile = phafile.replace("pha", "bkg") with fits.open(dirname / bkgfile, memmap=False) as hdulist: counts_off = RegionNDMap.from_hdulist(hdulist, format="ogip") acceptance_off = RegionNDMap.from_hdulist( hdulist, ogip_column="BACKSCAL") except OSError: # TODO : Add logger and echo warning counts_off, acceptance_off = None, None arffile = phafile.replace("pha", "arf") aeff = EffectiveAreaTable.read(dirname / arffile) return cls( counts=counts, aeff=aeff, counts_off=counts_off, edisp=edisp, livetime=counts.meta["EXPOSURE"] * u.s, mask_safe=mask_safe, acceptance=acceptance, acceptance_off=acceptance_off, name=str(counts.meta["OBS_ID"]), gti=gti, )