roman_shear_sims.noise

Functions

make_roman_noise(noise_image, bandpass, exp_time, ...)	Add noise to the image based on the Roman characteristics.
make_simple_noise(noise_image, sigma, galsim_rng)	Add simple Gaussian noise to the image.

Module Contents

make_roman_noise(noise_image, bandpass, exp_time, world_pos, galsim_rng, mjd=None, image_factor=1.0)

Add noise to the image based on the Roman characteristics. This include: - Sky noise (zodial light, thermal background) - Dark current noise - Read noise - Gain

Parameters:

• noise_image (galsim.Image) – The image to which noise will be added.

• bandpass (galsim.Bandpass) – The bandpass for which the noise is calculated.

• exp_time (float) – The exposure time in seconds.

• world_pos (galsim.CelestialCoord) – The celestial coordinates of the image center.

• galsim_rng (galsim.BaseDeviate) – The random number generator to use for noise generation.

• mjd (float, optional) – The modified Julian date for the observation. Default: None.

• image_factor (float, optional) – A factor to scale the noise level. Default: 1.0.

make_simple_noise(noise_image, sigma, galsim_rng)

Add simple Gaussian noise to the image.

Parameters:

• noise_image (galsim.Image) – The image to which noise will be added.

• sigma (float) – The standard deviation of the Gaussian noise.

• galsim_rng (galsim.BaseDeviate) – The random number generator to use for noise generation.