additive_systematic
Model additive systematic errors for HSC cosmic shear analysis
File |
likelihood/hsc_cosmic_shear/additive_systematic/sys_model.py |
Attribution |
Roohi Dalal |
Xiangchong Li |
|
HSC Collaboration |
|
URL |
|
Citations |
This module models additive systematic errors for the Hyper Suprime-Cam (HSC) cosmic shear analysis. It implements parametric models for systematics that are added to the theoretical cosmic shear correlation functions to account for observational effects that are not captured by the standard cosmological model.
Assumptions
Additive systematics can be modeled with simple parametric forms
Systematics are additive to the cosmic shear signal
Setup Parameters
Name |
Type |
Default |
Description |
|---|---|---|---|
theta_min |
real |
6.0 |
Minimum angular scale to include (arcmin) |
theta_max |
real |
200.0 |
Maximum angular scale to include (arcmin) |
model_type |
str |
Type of systematic model to use (‘systematics’ or ‘pca’) |
|
psf_file |
str |
Path to file containing PSF systematic matrices (required for model_type=’systematics’) |
|
nzs |
int |
Number of redshift bins (required for model_type=’systematics’) |
|
tfile |
str |
Optional transformation file for parameter space (for model_type=’systematics’) |
Input values
Section |
Name |
Type |
Default |
Description |
|---|---|---|---|---|
shear_xi_plus |
nbin_a |
int |
Number of redshift bins for first shear measurement |
|
nbin_b |
int |
Number of redshift bins for second shear measurement |
||
theta |
real 1d |
Angular separation values |
||
psf_systematics_parameters |
psf_cor{i}_z{j} |
real |
PSF correlation systematic parameters for component i, redshift bin j |
|
psf_c1_z{j} |
real |
PSF additive bias c1 parameter for redshift bin j |
||
psf_c2_z{j} |
real |
PSF additive bias c2 parameter for redshift bin j |
Output values
Section |
Name |
Type |
Description |
|---|---|---|---|
shear_xi_plus |
theta |
real 1d |
Modified angular separation values (trimmed to theta_min/theta_max range) |