def test_multi_gaussian_lens_light(self): kwargs_profile = [{ 'Rs': 0.16350224766074103, 'q': 0.4105628122365978, 'center_x': -0.019983826426838536, 'center_y': 0.90000011282957304, 'phi_G': 0.14944144075912402, 'sigma0': 1.3168943578511678 }, { 'Rs': 0.29187068596715743, 'q': 0.70799587973181288, 'center_x': 0.020568531548241405, 'center_y': 0.036038490364800925, 'Ra': 0.020000382843298824, 'phi_G': -0.37221683730659516, 'sigma0': 85.948773973262391 }] kwargs_options = { 'lens_model_list': ['SPEP'], 'lens_model_internal_bool': [True], 'lens_light_model_internal_bool': [True, True], 'lens_light_model_list': ['HERNQUIST_ELLIPSE', 'PJAFFE_ELLIPSE'] } lensAnalysis = LensAnalysis(kwargs_options) amplitudes, sigma = lensAnalysis.multi_gaussian_lens_light( kwargs_profile, n_comp=20) mge = MultiGaussian() flux = mge.function(1., 1, amp=amplitudes, sigma=sigma) npt.assert_almost_equal(flux, 0.04531989512955493, decimal=8)
def test_function_split(self): """ :return: """ profile = MultiGaussian() output = profile.function_split(x=1., y=1., amp=[1., 2], sigma=[1, 2], center_x=0, center_y=0) npt.assert_almost_equal(output[0], 0.058549831524319168, decimal=8) npt.assert_almost_equal(output[1], 0.061974997154826489, decimal=8)
def test_function_split(self): """ :return: """ multiGaussian = MultiGaussian() multiGaussianEllipse = MultiGaussianEllipse() output = multiGaussian.function_split(x=1., y=1., amp=[1., 2], sigma=[1, 2], center_x=0, center_y=0) output_2 = multiGaussianEllipse.function_split(x=1., y=1., amp=[1., 2], sigma=[1, 2], e1=0, e2=0, center_x=0, center_y=0) npt.assert_almost_equal(output[0], output_2[0], decimal=8) npt.assert_almost_equal(output[1], output_2[1], decimal=8)
def pixel_kernel(self, num_pix): """ computes a pixelized kernel from the MGE parameters :param num_pix: int, size of kernel (odd number per axis) :return: pixel kernel centered """ from lenstronomy.LightModel.Profiles.gaussian import MultiGaussian mg = MultiGaussian() x, y = util.make_grid(numPix=num_pix, deltapix=self._pixel_scale) kernel = mg.function(x, y, amp=self._fraction_list, sigma=self._sigmas_scaled) kernel = util.array2image(kernel) return kernel / np.sum(kernel)
def test_mge_kernel(): from lenstronomy.LightModel.Profiles.gaussian import MultiGaussian mg = MultiGaussian() fraction_list = [0.2, 0.7, 0.1] sigmas_scaled = [5, 10, 15] x, y = util.make_grid(numPix=101, deltapix=1) kernel = mg.function(x, y, amp=fraction_list, sigma=sigmas_scaled) kernel = util.array2image(kernel) amps, sigmas, norm = kernel_util.mge_kernel(kernel, order=10) print(amps, sigmas, norm) kernel_new = mg.function(x, y, amp=amps, sigma=sigmas) kernel_new = util.array2image(kernel_new) #npt.assert_almost_equal(sigmas_scaled, sigmas) #npt.assert_almost_equal(amps, fraction_list) npt.assert_almost_equal(kernel_new, kernel, decimal=3)
def __init__(self, light_model_list, smoothing=0.0000001): self.profile_type_list = light_model_list self.func_list = [] for profile_type in light_model_list: valid = True if profile_type == 'GAUSSIAN': from lenstronomy.LightModel.Profiles.gaussian import Gaussian self.func_list.append(Gaussian()) elif profile_type == 'GAUSSIAN_ELLIPSE': from lenstronomy.LightModel.Profiles.gaussian import GaussianEllipse self.func_list.append(GaussianEllipse()) elif profile_type == 'MULTI_GAUSSIAN': from lenstronomy.LightModel.Profiles.gaussian import MultiGaussian self.func_list.append(MultiGaussian()) elif profile_type == 'MULTI_GAUSSIAN_ELLIPSE': from lenstronomy.LightModel.Profiles.gaussian import MultiGaussianEllipse self.func_list.append(MultiGaussianEllipse()) elif profile_type == 'SERSIC': from lenstronomy.LightModel.Profiles.sersic import Sersic self.func_list.append(Sersic(smoothing=smoothing)) elif profile_type == 'SERSIC_ELLIPSE': from lenstronomy.LightModel.Profiles.sersic import Sersic_elliptic self.func_list.append(Sersic_elliptic(smoothing=smoothing)) elif profile_type == 'CORE_SERSIC': from lenstronomy.LightModel.Profiles.sersic import CoreSersic self.func_list.append(CoreSersic(smoothing=smoothing)) elif profile_type == 'SHAPELETS': from lenstronomy.LightModel.Profiles.shapelets import ShapeletSet self.func_list.append(ShapeletSet()) elif profile_type == 'HERNQUIST': from lenstronomy.LightModel.Profiles.hernquist import Hernquist self.func_list.append(Hernquist()) elif profile_type == 'HERNQUIST_ELLIPSE': from lenstronomy.LightModel.Profiles.hernquist import Hernquist_Ellipse self.func_list.append(Hernquist_Ellipse()) elif profile_type == 'PJAFFE': from lenstronomy.LightModel.Profiles.p_jaffe import PJaffe self.func_list.append(PJaffe()) elif profile_type == 'PJAFFE_ELLIPSE': from lenstronomy.LightModel.Profiles.p_jaffe import PJaffe_Ellipse self.func_list.append(PJaffe_Ellipse()) elif profile_type == 'UNIFORM': from lenstronomy.LightModel.Profiles.uniform import Uniform self.func_list.append(Uniform()) elif profile_type == 'POWER_LAW': from lenstronomy.LightModel.Profiles.power_law import PowerLaw self.func_list.append(PowerLaw()) elif profile_type == 'NIE': from lenstronomy.LightModel.Profiles.nie import NIE self.func_list.append(NIE()) elif profile_type == 'CHAMELEON': from lenstronomy.LightModel.Profiles.chameleon import Chameleon self.func_list.append(Chameleon()) elif profile_type == 'DOUBLE_CHAMELEON': from lenstronomy.LightModel.Profiles.chameleon import DoubleChameleon self.func_list.append(DoubleChameleon()) else: raise ValueError('Warning! No light model of type', profile_type, ' found!')
def test_light_3d(self): gaussianEllipse = GaussianEllipse() gaussian = Gaussian() sigma = 1 r = 1. amp = 1. flux_spherical = gaussian.light_3d(r, amp, sigma) flux = gaussianEllipse.light_3d(r, amp, sigma) npt.assert_almost_equal(flux, flux_spherical, decimal=8) multiGaussian = MultiGaussian() multiGaussianEllipse = MultiGaussianEllipse() amp = [1, 2] sigma = [1., 2] flux_spherical = multiGaussian.light_3d(r, amp, sigma) flux = multiGaussianEllipse.light_3d(r, amp, sigma) npt.assert_almost_equal(flux, flux_spherical, decimal=8)
def test_multi_gaussian_lens_light(self): kwargs_profile = [{ 'Rs': 0.16350224766074103, 'e1': 0, 'e2': 0, 'center_x': 0, 'center_y': 0, 'amp': 1.3168943578511678 }, { 'Rs': 0.29187068596715743, 'e1': 0, 'e2': 0, 'center_x': 0, 'center_y': 0, 'Ra': 0.020000382843298824, 'amp': 85.948773973262391 }] kwargs_options = { 'lens_model_list': ['SPEP'], 'lens_model_internal_bool': [True], 'lens_light_model_internal_bool': [True, True], 'lens_light_model_list': ['HERNQUIST_ELLIPSE', 'PJAFFE_ELLIPSE'] } lensAnalysis = LensAnalysis(kwargs_options) amplitudes, sigma, center_x, center_y = lensAnalysis.multi_gaussian_lens_light( kwargs_profile, n_comp=20) mge = MultiGaussian() flux = mge.function(1., 1, amp=amplitudes, sigma=sigma, center_x=center_x, center_y=center_y) flux_true = lensAnalysis.LensLightModel.surface_brightness( 1, 1, kwargs_profile) npt.assert_almost_equal(flux / flux_true, 1, decimal=2) del kwargs_profile[0]['center_x'] del kwargs_profile[0]['center_y'] amplitudes_new, sigma, center_x, center_y = lensAnalysis.multi_gaussian_lens_light( kwargs_profile, n_comp=20) npt.assert_almost_equal(amplitudes_new, amplitudes, decimal=2)
def test_multi_gaussian_decomposition(self): Rs = 1. kwargs_light = [{'Rs': Rs, 'amp': 1., 'center_x': 0, 'center_y': 0}] kwargs_options = {'light_model_list': ['HERNQUIST']} lightModel = LightModel(**kwargs_options) profile = LightProfileAnalysis(light_model=lightModel) amplitudes, sigmas, center_x, center_y = profile.multi_gaussian_decomposition(kwargs_light, grid_spacing=0.01, grid_num=100, model_bool_list=None, n_comp=20, center_x=None, center_y=None) mge = MultiGaussian() r_array = np.logspace(start=-2, stop=0.5, num=10) print(r_array, 'test r_array') flux = mge.function(r_array, 0, amp=amplitudes, sigma=sigmas, center_x=center_x, center_y=center_y) flux_true = lightModel.surface_brightness(r_array, 0, kwargs_light) npt.assert_almost_equal(flux / flux_true, 1, decimal=2) # test off-center Rs = 1. offset = 1. kwargs_light = [{'Rs': Rs, 'amp': 1., 'center_x': offset, 'center_y': 0}] kwargs_options = {'light_model_list': ['HERNQUIST']} lightModel = LightModel(**kwargs_options) profile = LightProfileAnalysis(light_model=lightModel) amplitudes, sigmas, center_x, center_y = profile.multi_gaussian_decomposition(kwargs_light, grid_spacing=0.01, grid_num=100, model_bool_list=None, n_comp=20, center_x=None, center_y=None) assert center_x == offset assert center_y == 0 mge = MultiGaussian() r_array = np.logspace(start=-2, stop=0.5, num=10) print(r_array, 'test r_array') flux = mge.function(r_array, 0, amp=amplitudes, sigma=sigmas, center_x=center_x, center_y=center_y) flux_true = lightModel.surface_brightness(r_array, 0, kwargs_light) npt.assert_almost_equal(flux / flux_true, 1, decimal=2) """
def __init__(self, light_model_list, smoothing=0.001): """ :param light_model_list: list of light models :param smoothing: smoothing factor for certain models (deprecated) """ self.profile_type_list = light_model_list self.func_list = [] for profile_type in light_model_list: if profile_type == 'GAUSSIAN': from lenstronomy.LightModel.Profiles.gaussian import Gaussian self.func_list.append(Gaussian()) elif profile_type == 'GAUSSIAN_ELLIPSE': from lenstronomy.LightModel.Profiles.gaussian import GaussianEllipse self.func_list.append(GaussianEllipse()) elif profile_type == 'ELLIPSOID': from lenstronomy.LightModel.Profiles.ellipsoid import Ellipsoid self.func_list.append(Ellipsoid()) elif profile_type == 'MULTI_GAUSSIAN': from lenstronomy.LightModel.Profiles.gaussian import MultiGaussian self.func_list.append(MultiGaussian()) elif profile_type == 'MULTI_GAUSSIAN_ELLIPSE': from lenstronomy.LightModel.Profiles.gaussian import MultiGaussianEllipse self.func_list.append(MultiGaussianEllipse()) elif profile_type == 'SERSIC': from lenstronomy.LightModel.Profiles.sersic import Sersic self.func_list.append(Sersic(smoothing=smoothing)) elif profile_type == 'SERSIC_ELLIPSE': from lenstronomy.LightModel.Profiles.sersic import SersicElliptic self.func_list.append( SersicElliptic(smoothing=smoothing, sersic_major_axis=sersic_major_axis_conf)) elif profile_type == 'CORE_SERSIC': from lenstronomy.LightModel.Profiles.sersic import CoreSersic self.func_list.append(CoreSersic(smoothing=smoothing)) elif profile_type == 'SHAPELETS': from lenstronomy.LightModel.Profiles.shapelets import ShapeletSet self.func_list.append(ShapeletSet()) elif profile_type == 'SHAPELETS_POLAR': from lenstronomy.LightModel.Profiles.shapelets_polar import ShapeletSetPolar self.func_list.append(ShapeletSetPolar(exponential=False)) elif profile_type == 'SHAPELETS_POLAR_EXP': from lenstronomy.LightModel.Profiles.shapelets_polar import ShapeletSetPolar self.func_list.append(ShapeletSetPolar(exponential=True)) elif profile_type == 'HERNQUIST': from lenstronomy.LightModel.Profiles.hernquist import Hernquist self.func_list.append(Hernquist()) elif profile_type == 'HERNQUIST_ELLIPSE': from lenstronomy.LightModel.Profiles.hernquist import HernquistEllipse self.func_list.append(HernquistEllipse()) elif profile_type == 'PJAFFE': from lenstronomy.LightModel.Profiles.p_jaffe import PJaffe self.func_list.append(PJaffe()) elif profile_type == 'PJAFFE_ELLIPSE': from lenstronomy.LightModel.Profiles.p_jaffe import PJaffe_Ellipse self.func_list.append(PJaffe_Ellipse()) elif profile_type == 'UNIFORM': from lenstronomy.LightModel.Profiles.uniform import Uniform self.func_list.append(Uniform()) elif profile_type == 'POWER_LAW': from lenstronomy.LightModel.Profiles.power_law import PowerLaw self.func_list.append(PowerLaw()) elif profile_type == 'NIE': from lenstronomy.LightModel.Profiles.nie import NIE self.func_list.append(NIE()) elif profile_type == 'CHAMELEON': from lenstronomy.LightModel.Profiles.chameleon import Chameleon self.func_list.append(Chameleon()) elif profile_type == 'DOUBLE_CHAMELEON': from lenstronomy.LightModel.Profiles.chameleon import DoubleChameleon self.func_list.append(DoubleChameleon()) elif profile_type == 'TRIPLE_CHAMELEON': from lenstronomy.LightModel.Profiles.chameleon import TripleChameleon self.func_list.append(TripleChameleon()) elif profile_type == 'INTERPOL': from lenstronomy.LightModel.Profiles.interpolation import Interpol self.func_list.append(Interpol()) elif profile_type == 'SLIT_STARLETS': from lenstronomy.LightModel.Profiles.starlets import SLIT_Starlets self.func_list.append( SLIT_Starlets(fast_inverse=True, second_gen=False)) elif profile_type == 'SLIT_STARLETS_GEN2': from lenstronomy.LightModel.Profiles.starlets import SLIT_Starlets self.func_list.append(SLIT_Starlets(second_gen=True)) else: raise ValueError( 'No light model of type %s found! Supported are the following models: %s' % (profile_type, _MODELS_SUPPORTED)) self._num_func = len(self.func_list)
def setup(self): self.sersic = Sersic() self.multiGaussian = MultiGaussian()
class TestMGE(object): """ tests the Gaussian methods """ def setup(self): self.sersic = Sersic() self.multiGaussian = MultiGaussian() def test_mge_1d_sersic(self): n_comp = 30 r_sersic = 1. n_sersic = 3.7 I0_sersic = 1. rs = np.logspace(-2., 1., 50) * r_sersic ss = self.sersic.function(rs, np.zeros_like(rs), amp=I0_sersic, n_sersic=n_sersic, R_sersic=r_sersic) amplitudes, sigmas, norm = mge.mge_1d(rs, ss, N=n_comp) ss_mge = self.multiGaussian.function(rs, np.zeros_like(rs), amp=amplitudes, sigma=sigmas) #print((ss - ss_mge)/ss) for i in range(10, len(ss) - 10): #print(rs[i]) npt.assert_almost_equal((ss_mge[i] - ss[i]) / ss[i], 0, decimal=1) amplitudes, sigmas, norm = mge.mge_1d(rs, np.zeros_like(rs), N=n_comp) assert amplitudes[0] == 0 amplitudes, sigmas, norm = mge.mge_1d(rs, np.zeros_like(rs), N=0) assert amplitudes[0] == 0 def test_mge_sersic_radius(self): n_comp = 30 r_sersic = .5 n_sersic = 3.7 I0_sersic = 1. rs = np.logspace(-2., 1., 50) * r_sersic ss = self.sersic.function(rs, np.zeros_like(rs), amp=I0_sersic, n_sersic=n_sersic, R_sersic=r_sersic) amplitudes, sigmas, norm = mge.mge_1d(rs, ss, N=n_comp) ss_mge = self.multiGaussian.function(rs, np.zeros_like(rs), amp=amplitudes, sigma=sigmas) print((ss - ss_mge) / (ss + ss_mge)) for i in range(10, len(ss) - 10): #print(rs[i]) npt.assert_almost_equal((ss_mge[i] - ss[i]) / (ss[i]), 0, decimal=1) def test_mge_sersic_n_sersic(self): n_comp = 20 r_sersic = 1.5 n_sersic = .5 I0_sersic = 1. rs = np.logspace(-2., 1., 50) * r_sersic ss = self.sersic.function(rs, np.zeros_like(rs), amp=I0_sersic, n_sersic=n_sersic, R_sersic=r_sersic) amplitudes, sigmas, norm = mge.mge_1d(rs, ss, N=n_comp) ss_mge = self.multiGaussian.function(rs, np.zeros_like(rs), amp=amplitudes, sigma=sigmas) for i in range(10, len(ss) - 10): npt.assert_almost_equal((ss_mge[i] - ss[i]) / (ss[i] + ss_mge[i]), 0, decimal=1) n_comp = 20 r_sersic = 1.5 n_sersic = 3.5 I0_sersic = 1. rs = np.logspace(-2., 1., 50) * r_sersic ss = self.sersic.function(rs, np.zeros_like(rs), amp=I0_sersic, n_sersic=n_sersic, R_sersic=r_sersic) amplitudes, sigmas, norm = mge.mge_1d(rs, ss, N=n_comp) ss_mge = self.multiGaussian.function(rs, np.zeros_like(rs), amp=amplitudes, sigma=sigmas) for i in range(10, len(ss) - 10): npt.assert_almost_equal((ss_mge[i] - ss[i]) / (ss[i] + ss_mge[i]), 0, decimal=1) def test_hernquist(self): hernquist = Hernquist() n_comp = 20 sigma0 = 1 r_eff = 1.5 rs = np.logspace(-2., 1., 50) * r_eff * 0.5 ss = hernquist.function(rs, np.zeros_like(rs), sigma0, Rs=r_eff) amplitudes, sigmas, norm = mge.mge_1d(rs, ss, N=n_comp) ss_mge = self.multiGaussian.function(rs, np.zeros_like(rs), amp=amplitudes, sigma=sigmas) for i in range(10, len(ss) - 10): npt.assert_almost_equal((ss_mge[i] - ss[i]) / (ss[i] + ss_mge[i]), 0, decimal=2) def test_hernquist_deprojection(self): hernquist = Hernquist() n_comp = 20 sigma0 = 1 r_eff = 1.5 rs = np.logspace(-2., 1., 50) * r_eff * 0.5 ss = hernquist.function(rs, np.zeros_like(rs), sigma0, Rs=r_eff) amplitudes, sigmas, norm = mge.mge_1d(rs, ss, N=n_comp) amplitudes_3d, sigmas_3d = mge.de_projection_3d(amplitudes, sigmas) ss_3d_mge = self.multiGaussian.function(rs, np.zeros_like(rs), amp=amplitudes_3d, sigma=sigmas_3d) ss_3d_mulit = self.multiGaussian.light_3d(rs, amp=amplitudes, sigma=sigmas) for i in range(10, len(ss_3d_mge)): npt.assert_almost_equal((ss_3d_mge[i] - ss_3d_mulit[i]) / (ss_3d_mulit[i] + ss_3d_mge[i]), 0, decimal=1) ss_3d = hernquist.light_3d(rs, sigma0, Rs=r_eff) for i in range(10, len(ss_3d) - 10): npt.assert_almost_equal( (ss_3d_mge[i] - ss_3d[i]) / (ss_3d[i] + ss_3d_mge[i]), 0, decimal=1) def test_spemd(self): from lenstronomy.LensModel.Profiles.spep import SPEP from lenstronomy.LensModel.Profiles.multi_gaussian_kappa import MultiGaussianKappa spep = SPEP() mge_kappa = MultiGaussianKappa() n_comp = 8 theta_E = 1.41 kwargs = {'theta_E': theta_E, 'e1': 0, 'e2': 0, 'gamma': 1.61} rs = np.logspace(-2., 1., 100) * theta_E f_xx, f_yy, f_xy = spep.hessian(rs, 0, **kwargs) kappa = 1 / 2. * (f_xx + f_yy) amplitudes, sigmas, norm = mge.mge_1d(rs, kappa, N=n_comp) kappa_mge = self.multiGaussian.function(rs, np.zeros_like(rs), amp=amplitudes, sigma=sigmas) f_xx_mge, f_yy_mge, f_xy_mge = mge_kappa.hessian(rs, np.zeros_like(rs), amp=amplitudes, sigma=sigmas) for i in range(0, 80): npt.assert_almost_equal(kappa_mge[i], 1. / 2 * (f_xx_mge[i] + f_yy_mge[i]), decimal=1) npt.assert_almost_equal((kappa[i] - kappa_mge[i]) / kappa[i], 0, decimal=1) f_ = spep.function(theta_E, 0, **kwargs) f_mge = mge_kappa.function(theta_E, 0, sigma=sigmas, amp=amplitudes) npt.assert_almost_equal(f_mge / f_, 1, decimal=2) def test_example(self): n_comp = 10 rs = np.array([ 0.01589126, 0.01703967, 0.01827108, 0.01959148, 0.0210073, 0.02252544, 0.02415329, 0.02589879, 0.02777042, 0.02977731, 0.03192923, 0.03423667, 0.03671086, 0.03936385, 0.04220857, 0.04525886, 0.0485296, 0.0520367, 0.05579724, 0.05982956, 0.06415327, 0.06878945, 0.07376067, 0.07909115, 0.08480685, 0.09093561, 0.09750727, 0.10455385, 0.11210966, 0.12021152, 0.12889887, 0.13821403, 0.14820238, 0.15891255, 0.17039672, 0.18271082, 0.19591482, 0.21007304, 0.22525444, 0.24153295, 0.25898787, 0.2777042, 0.29777311, 0.31929235, 0.34236672, 0.36710861, 0.39363853, 0.42208569, 0.45258865, 0.48529597, 0.52036697, 0.55797244, 0.59829556, 0.64153272, 0.6878945, 0.73760673, 0.79091152, 0.8480685, 0.90935605, 0.97507269, 1.04553848, 1.12109664, 1.20211518, 1.28898871, 1.38214034, 1.48202378, 1.58912553, 1.70396721, 1.82710819, 1.95914822, 2.10073042, 2.25254437, 2.4153295, 2.58987865, 2.77704199, 2.9777311, 3.19292345, 3.42366716, 3.67108607, 3.93638527, 4.22085689, 4.5258865, 4.85295974, 5.20366966, 5.57972441, 5.98295559, 6.41532717, 6.87894505, 7.37606729, 7.90911519, 8.48068497, 9.09356051, 9.75072687, 10.45538481, 11.21096643, 12.02115183, 12.88988708, 13.82140341, 14.82023784, 15.89125526 ]) kappa = np.array([ 12.13776067, 11.60484966, 11.09533396, 10.60818686, 10.14242668, 9.69711473, 9.27135349, 8.86428482, 8.47508818, 8.10297905, 7.7472073, 7.40705574, 7.08183863, 6.77090034, 6.47361399, 6.18938022, 5.917626, 5.65780342, 5.40938864, 5.1718808, 4.94480104, 4.72769151, 4.52011448, 4.3216514, 4.13190214, 3.9504841, 3.77703149, 3.61119459, 3.45263901, 3.30104507, 3.1561071, 3.01753287, 2.88504297, 2.75837025, 2.63725931, 2.52146595, 2.41075668, 2.30490829, 2.20370736, 2.10694982, 2.01444058, 1.92599312, 1.84142909, 1.76057799, 1.6832768, 1.60936965, 1.53870751, 1.47114792, 1.40655465, 1.34479745, 1.28575181, 1.22929867, 1.17532421, 1.12371958, 1.07438074, 1.02720821, 0.98210687, 0.93898578, 0.897758, 0.85834039, 0.82065349, 0.78462129, 0.75017114, 0.71723359, 0.68574222, 0.65563353, 0.62684681, 0.59932403, 0.57300967, 0.5478507, 0.52379638, 0.5007982, 0.47880979, 0.45778683, 0.43768691, 0.41846951, 0.40009589, 0.38252899, 0.3657334, 0.34967525, 0.33432216, 0.31964317, 0.30560868, 0.29219041, 0.27936129, 0.26709545, 0.25536817, 0.24415579, 0.23343571, 0.22318631, 0.21338694, 0.20401782, 0.19506006, 0.18649562, 0.17830721, 0.17047832, 0.16299318, 0.15583668, 0.14899441, 0.14245255 ]) amplitudes, sigmas, norm = mge.mge_1d(rs, kappa, N=n_comp) def test_nfw_sersic(self): kwargs_lens_nfw = { 'alpha_Rs': 1.4129647849966354, 'Rs': 7.0991113634274736 } kwargs_lens_sersic = { 'k_eff': 0.24100561407593576, 'n_sersic': 1.8058507329346063, 'R_sersic': 1.0371803141813705 } from lenstronomy.LensModel.Profiles.nfw import NFW from lenstronomy.LensModel.Profiles.sersic import Sersic nfw = NFW() sersic = Sersic() theta_E = 1.5 n_comp = 10 rs = np.logspace(-2., 1., 100) * theta_E f_xx_nfw, f_yy_nfw, f_xy_nfw = nfw.hessian(rs, 0, **kwargs_lens_nfw) f_xx_s, f_yy_s, f_xy_s = sersic.hessian(rs, 0, **kwargs_lens_sersic) kappa = 1 / 2. * (f_xx_nfw + f_xx_s + f_yy_nfw + f_yy_s) amplitudes, sigmas, norm = mge.mge_1d(rs, kappa, N=n_comp) kappa_mge = self.multiGaussian.function(rs, np.zeros_like(rs), amp=amplitudes, sigma=sigmas) from lenstronomy.LensModel.Profiles.multi_gaussian_kappa import MultiGaussianKappa mge_kappa = MultiGaussianKappa() f_xx_mge, f_yy_mge, f_xy_mge = mge_kappa.hessian(rs, np.zeros_like(rs), amp=amplitudes, sigma=sigmas) for i in range(0, 80): npt.assert_almost_equal(kappa_mge[i], 1. / 2 * (f_xx_mge[i] + f_yy_mge[i]), decimal=1) npt.assert_almost_equal((kappa[i] - kappa_mge[i]) / kappa[i], 0, decimal=1) f_nfw = nfw.function(theta_E, 0, **kwargs_lens_nfw) f_s = sersic.function(theta_E, 0, **kwargs_lens_sersic) f_mge = mge_kappa.function(theta_E, 0, sigma=sigmas, amp=amplitudes) npt.assert_almost_equal(f_mge / (f_nfw + f_s), 1, decimal=2)
def __init__(self, light_model_list, deflection_scaling_list=None, source_redshift_list=None, smoothing=0.0000001): """ :param light_model_list: list of light models :param deflection_scaling_list: list of floats, rescales the original reduced deflection angles from the lens model to enable different models to be placed at different optical (redshift) distances. None means they are all :param source_redshift_list: list of redshifts of the model components :param smoothing: smoothing factor for certain models (deprecated) """ self.profile_type_list = light_model_list self.deflection_scaling_list = deflection_scaling_list self.redshift_list = source_redshift_list self.func_list = [] for profile_type in light_model_list: if profile_type == 'GAUSSIAN': from lenstronomy.LightModel.Profiles.gaussian import Gaussian self.func_list.append(Gaussian()) elif profile_type == 'GAUSSIAN_ELLIPSE': from lenstronomy.LightModel.Profiles.gaussian import GaussianEllipse self.func_list.append(GaussianEllipse()) elif profile_type == 'MULTI_GAUSSIAN': from lenstronomy.LightModel.Profiles.gaussian import MultiGaussian self.func_list.append(MultiGaussian()) elif profile_type == 'MULTI_GAUSSIAN_ELLIPSE': from lenstronomy.LightModel.Profiles.gaussian import MultiGaussianEllipse self.func_list.append(MultiGaussianEllipse()) elif profile_type == 'SERSIC': from lenstronomy.LightModel.Profiles.sersic import Sersic self.func_list.append(Sersic(smoothing=smoothing)) elif profile_type == 'SERSIC_ELLIPSE': from lenstronomy.LightModel.Profiles.sersic import SersicElliptic self.func_list.append(SersicElliptic(smoothing=smoothing)) elif profile_type == 'CORE_SERSIC': from lenstronomy.LightModel.Profiles.sersic import CoreSersic self.func_list.append(CoreSersic(smoothing=smoothing)) elif profile_type == 'SHAPELETS': from lenstronomy.LightModel.Profiles.shapelets import ShapeletSet self.func_list.append(ShapeletSet()) elif profile_type == 'HERNQUIST': from lenstronomy.LightModel.Profiles.hernquist import Hernquist self.func_list.append(Hernquist()) elif profile_type == 'HERNQUIST_ELLIPSE': from lenstronomy.LightModel.Profiles.hernquist import HernquistEllipse self.func_list.append(HernquistEllipse()) elif profile_type == 'PJAFFE': from lenstronomy.LightModel.Profiles.p_jaffe import PJaffe self.func_list.append(PJaffe()) elif profile_type == 'PJAFFE_ELLIPSE': from lenstronomy.LightModel.Profiles.p_jaffe import PJaffe_Ellipse self.func_list.append(PJaffe_Ellipse()) elif profile_type == 'UNIFORM': from lenstronomy.LightModel.Profiles.uniform import Uniform self.func_list.append(Uniform()) elif profile_type == 'POWER_LAW': from lenstronomy.LightModel.Profiles.power_law import PowerLaw self.func_list.append(PowerLaw()) elif profile_type == 'NIE': from lenstronomy.LightModel.Profiles.nie import NIE self.func_list.append(NIE()) elif profile_type == 'CHAMELEON': from lenstronomy.LightModel.Profiles.chameleon import Chameleon self.func_list.append(Chameleon()) elif profile_type == 'DOUBLE_CHAMELEON': from lenstronomy.LightModel.Profiles.chameleon import DoubleChameleon self.func_list.append(DoubleChameleon()) elif profile_type == 'INTERPOL': from lenstronomy.LightModel.Profiles.interpolation import Interpol self.func_list.append(Interpol()) else: raise ValueError('Warning! No light model of type', profile_type, ' found!')