xlens.catalog.base

Classes

ShearEstimator

Functions

get_esq(→ numpy.ndarray)	Return |e|^2 evaluated at shear g_comp = dg to first order.
get_trace(→ numpy.ndarray)	Return trace evaluated at shear g_comp = dg to first order.
_bin_count(*, idx[, weights, minlength])
measure_shear(*, src, z_estimator, zbounds[, ...])	Measure shear components in redshift bins, using a supplied z-estimator.

Module Contents

get_esq(src: numpy.ndarray, comp: int = 1, dg: float = 0.0, sn: str = 'fpfs_') → numpy.ndarray

Return |e|^2 evaluated at shear g_comp = dg to first order.

get_trace(src: numpy.ndarray, comp: int = 1, dg: float = 0.0, sn: str = 'fpfs_') → numpy.ndarray

Return trace evaluated at shear g_comp = dg to first order.

_bin_count(*, idx, weights=None, minlength=0)

class ShearEstimator(*, mag_max: float | dict = 40.0, emax: float = 0.3, trace_min: float = 0.05, mag_zero: float = 30.0, flux_name: str = 'gauss2', shape_name: str = 'fpfs', bands: str = 'grizy', ref_band: str = 'i', z_estimator=None, zbounds: list[float] = [0.0, 100.0], z_width95_max: float = 2.75, dg: float = 0.02, z_point_name: str = 'zmode')

Bases: object

fn = '_gauss2'

magx

dg = 0.02

bands = 'grizy'

emax2 = 0.09

trace_min = 0.05

z_estimator = None

flux_name = 'gauss2'

ref_band = 'i'

mag_zero = 30.0

zbounds = [0.0, 100.0]

z_width95_max = 2.75

z_point_name = 'zmode'

_measure(src, comp: int, sign: float, extinction: numpy.ndarray | None = None)

Compute binned <w_sel e> for shear +sign*dg.

get_sel_response(src, comp: int, extinction: numpy.ndarray | None = None) → numpy.ndarray

Selection response term for component comp (1 or 2).

measure_shear(src: numpy.ndarray, target: str, extinction: numpy.ndarray | None = None)

Measure shear components in redshift bins, using a supplied z-estimator.

measure_shear(*, src: numpy.ndarray, z_estimator, zbounds: list[float], flux_min: float | dict = 40.0, emax: float = 0.3, trace_min: float = 0.05, z_width95_max: float = 2.75, dg: float = 0.02, target: str = 'g1', do_correction: bool = True, mag_zero: float = 30.0, flux_name: str = 'gauss2', bands: str = 'grizy', ref_band: str = 'i', z_point_name: str = 'zmode')

Measure shear components in redshift bins, using a supplied z-estimator.

Parameters:

z_estimator (object) –

Must provide method

get_zsel(

src, *, mag_zero, flux_name, bands, ref_band, comp, dg

) -> (zmode, width95)