Tomography catalogs

Tomography catalogs primarily list the tomographic bin selected for each object. The “bin” column is an integer that indexes the tomographic bin, one value per object in the main (shear or photometry) catalog. The first bin is indexed as zero. A value of -1 indicates that the object was not selected for any tomographic bin (e.g. because its SNR was too low).

The “counts” column is the number of objects in each bin. The “counts_2d” column is the number of objects selected non-tomographically (i.e. the number of objects with any bin value other than -1).

Group	Name	Kind
tomography	bin	1D int32
tomography	counts	1D int32
tomography	counts_2d	1D int32

Shear tomography catalogs

Shear tomography catalogs additionally store: - calibration information, depending on the type of shear catalog - mean shear values - effective number counts and ellipticity dispersion sigma_e

Group	Name	Kind
response	R	3D float32
response	R_2d	2D float32
tomography	N_eff	1D float32
tomography	N_eff_2d	1D float32
tomography	bin	1D int32
tomography	counts	1D int32
tomography	counts_2d	1D int32
tomography	mean_e1	1D float32
tomography	mean_e1_2d	1D float32
tomography	mean_e2	1D float32
tomography	mean_e2_2d	1D float32
tomography	sigma_e	1D float32
tomography	sigma_e_2d	1D float32

Lens tomography catalogs

Lens tomography catalogs additionally store a weight column. Lens tomography files with the “_unweighted” suffix have unit values in that column. The version without the suffix has the weight values that account for systematic effects.

Group	Name	Kind
tomography	bin	1D int32
tomography	counts	1D int32
tomography	counts_2d	1D int32
tomography	lens_weight	1D float32