darkmappy.noise_simulations.Gaussian_noise_plane(x, gals_pix, sigma_e, mask=None)

Adds realistic noise based on observational ngal.

Parameters

• x (np.ndarray) – Clean simulated data.

• mask (int array) – Sky mask map

• gals_pix (float) – Number of observations per pixel

• sigma_e (float) – Intrinsic ellipticity dispersion.

darkmappy.noise_simulations.Gaussian_noise_sphere(x, L, ngal, sigma_e, mask=None)

Adds realistic noise based on observational ngal.

Parameters

• x (np.ndarray) – Clean simulated data.

• mask (int array) – Sky mask map

• L (int) – Angular bandlimit.

• ngal (float) – Number density of galaxy observations to simulate.

• sigma_e (float) – Intrinsic ellipticity dispersion.

Raises

ValueError – Input shape incorrect.

darkmappy.noise_simulations.simulate_shear_plane(x, sidelength, ngal=30, sigma_e=0.37, mask=None, supersample=1)

Creates a realistic simulation of shear observations from input convergence.

Parameters

• x (np.ndarray) – Input convergence map

• mask (int array) – Input convergence mask map

• sidelength (int) – Angular span of axes.

• ngal (float) – Number density of galaxy observations to simulate.

• sigma_e (float) – Intrinsic ellipticity dispersion.

darkmappy.noise_simulations.simulate_shear_sphere(x, L, ngal=30, sigma_e=0.37, mask=None)

Creates a realistic simulation of shear observations from input convergence.

Parameters

• x (np.ndarray) – Input convergence map

• mask (int array) – Input convergence mask map

• L (int) – Angular bandlimit.

• ngal (float) – Number density of galaxy observations to simulate.

• sigma_e (float) – Intrinsic ellipticity dispersion.

Raises

ValueError – Input shape incorrect.