galsbi.ucat.plugins package

Submodules

galsbi.ucat.plugins.apply_shear module

Created on Mar 27, 2019 author: Joerg Herbel

class galsbi.ucat.plugins.apply_shear.Plugin(ctx, **kwargs)

Bases: BasePlugin

Apply a potentially redshift-dependent shear from input shear maps specified by ctx.parameters.path_shear_map. Only first-order effects due to gamma are applied, kappa is completely ignored. There are three options:

1. The path is None, which will result in zero shear.

2. The path is a file readable by healpy. The file is then assumed to contain 3

   healpix maps (kappa, gamma1, gamma2).

3. The path is and hdf5-file containing multiple, kappa-, gamma1- and gamma2-maps at

   given redshifts. The shear values are computed by interpolating linearly between the maps.

galsbi.ucat.plugins.apply_shear.evaluate_hdf5_shear_maps(path, ra, dec, z)

Evaluate hdf5 shear maps given at multiple redshifts for given redshifts and angular positions.

Parameters:

• path – path to hdf5 file containing shear maps; assumes that this file contains four datasets: - z: redshifts of maps - kappa: kappa-maps - gamma1: gamma1-maps - gamma2: gamma2-maps

• ra – right ascensions where maps will be evaluated

• dec – declinations where maps will be evaluated

• z – redshifts to which maps will be interpolated

Returns:

kappa, gamma1 and gamma2

galsbi.ucat.plugins.apply_shear.evaluate_healpix_shear_map(path, ra, dec)

Reads in a healpix map and evaluates it at given positions.

Parameters:

• path – path where map is stored, assumes that file contains three maps (kappa, gamma1, gamma2)

• ra – right ascension where map is evaluated

• dec – declinations where map is evaluated

Returns:

kappa, gamma1 and gamma2 evaluated at input positions

galsbi.ucat.plugins.apply_shear.interpolate_maps(z_maps, maps, z, pixel_ind, ind_intervals)

Linearly interpolate to input redshifts between healpix maps at given redshifts.

Parameters:

• z_maps – redshifts of input maps, assumed to be ordered

• maps – input maps corresponding to z_maps, type: hdf5-dataset or numpy-array

• z – redshifts to which maps will be interpolated, assumed to be sorted

• pixel_ind – indices indicating pixels of input maps to interpolate, same size as z

• ind_intervals – indices splitting up z into chunks that lie between the maps

Returns:

interpolated values

galsbi.ucat.plugins.apply_shear.interpolate_maps_fast(z_maps, maps, z, pixel_ind, ind_intervals)

Linearly interpolate to input redshifts between healpix maps at given redshifts.

Parameters:

• z_maps – redshifts of input maps, assumed to be ordered

• maps – input maps corresponding to z_maps, type: hdf5-dataset or numpy-array

• z – redshifts to which maps will be interpolated, assumed to be sorted

• pixel_ind – indices indicating pixels of input maps to interpolate, same size as z

• ind_intervals – indices splitting up z into chunks that lie between the maps

Returns:

interpolated values

galsbi.ucat.plugins.apply_shear.linear_interpolation(x0, y0, x1, y1, x)

Vectorized linear interpolation between two data points.

Parameters:

• x0 – x-coordinates of first data points

• y0 – y-coordinates of first data points

• x1 – x-coordinates of second data points

• y1 – y-coordinates of second data points

• x – positions where interpolation is evaluated

Returns:

interpolated values

galsbi.ucat.plugins.galaxy_mag_noise module

Created on Aug 2021 author: Tomasz Kacprzak

class galsbi.ucat.plugins.galaxy_mag_noise.Plugin(ctx, **kwargs)

Bases: BasePlugin

galsbi.ucat.plugins.galaxy_mag_noise.flux_to_mag(flux)

galsbi.ucat.plugins.galaxy_mag_noise.mag_to_flux(mag)

galsbi.ucat.plugins.galaxy_z_noise module

Created on Aug 2021 author: Tomasz Kacprzak

class galsbi.ucat.plugins.galaxy_z_noise.Plugin(ctx, **kwargs)

Bases: BasePlugin

galsbi.ucat.plugins.galaxy_z_noise.add_z_noise(z, delta_z, frac_outliers)

galsbi.ucat.plugins.sample_galaxies module

Created on Mar 5, 2018 author: Joerg Herbel

class galsbi.ucat.plugins.sample_galaxies.Plugin(ctx, **kwargs)

Bases: BasePlugin

Generate a random catalog of galaxies with magnitudes in multiple bands.

galsbi.ucat.plugins.sample_galaxies_morph module

Created 2021 author: Tomasz Kacprzak

class galsbi.ucat.plugins.sample_galaxies_morph.Plugin(ctx, **kwargs)

Bases: BasePlugin

Generate a random catalog of galaxies with magnitudes in multiple bands.

galsbi.ucat.plugins.sample_galaxies_photo module

Created on Mar 5, 2018 author: Joerg Herbel

class galsbi.ucat.plugins.sample_galaxies_photo.ExtinctionMapEvaluator(par)

Bases: object

Class that gives extinction values for positions

class galsbi.ucat.plugins.sample_galaxies_photo.Plugin(ctx, **kwargs)

Bases: BasePlugin

Generate a random catalog of galaxies with magnitudes in multiple bands.

check_max_mem_error(par)

Check if the catalog does not exceed allowed memory. Prevents job crashes on clusters.

check_n_gal_prior(par)

Check if the number of galaxies is inside the prior range, even before rendering, to remove extreme values.

galsbi.ucat.plugins.sample_galaxies_photo.compute_templates_extinction_appmag_for_galaxies(galaxy_type, par, n_templates, cosmo, w, redshifts, absmags, x_pixel, y_pixel, mag_calc, extinction_eval)

galsbi.ucat.plugins.sample_galaxies_photo.get_magnitude_calculator_direct(filter_names, par)

Interface to direct magnitude calculation

galsbi.ucat.plugins.sample_galaxies_photo.get_magnitude_calculator_table(filter_names, par)

Interface to magnitude calculation with pre-computed tables

galsbi.ucat.plugins.sample_galaxies_photo.get_seds(par, galaxies)

Get SEDs for galaxies in the catalog

galsbi.ucat.plugins.sample_galaxies_photo.in_pos(x, y, par)

galsbi.ucat.plugins.write_catalog module

Created on Aug 2021 author: Tomasz Kacprzak

class galsbi.ucat.plugins.write_catalog.Plugin(ctx, **kwargs)

Bases: BasePlugin

enrich_catalog(cat)

galsbi.ucat.plugins.write_catalog.catalog_to_rec(catalog)

galsbi.ucat.plugins.write_catalog.save_sed(filepath_out, cat, restframe_wavelength_in_A)

Save the SEDs to a file. The SEDs are saved in the rest frame, so we need to adapt the wavelenghts to the observed frame.

galsbi.ucat.plugins.write_catalog.sed_catalog_to_rec(catalog)

To save the SEDs, we don’t need the full catalog, but only the ID, SED and redshift. The ID is necessary to link the SEDs to the galaxies in the photometric catalog. The redshift is necessary to adapt the wavelengths of the SEDs to the observed frame

galsbi.ucat.plugins.write_catalog_photo module

Created on Aug 2021 author: Tomasz Kacprzak

class galsbi.ucat.plugins.write_catalog_photo.Plugin(ctx, **kwargs)

Bases: BasePlugin

galsbi.ucat.plugins.write_catalog_photo.get_ucat_catalog_filename()

Module contents