Cluster Files
The TXPipe core is focused on 3x2pt (lensing + clustering) measurements, but the CLMM packages runs of its data selection steps within TXPipe. The files these stages use are described here.
Cluster Catalogs
Cluster catalogs are generated by cluster-finding algorithms like RedMapper (which are currently not run within TXPipe). They are an input to the stages in txpipe/extensions/clmm.
Group |
Name |
Kind |
Meaning |
|---|---|---|---|
clusters |
cluster_id |
int64 |
|
clusters |
ra |
float64 |
|
clusters |
dec |
float64 |
|
clusters |
redshift |
float64 |
|
clusters |
redshift_err |
float64 |
|
clusters |
richness |
float64 |
|
clusters |
richness_err |
float64 |
|
clusters |
scaleval |
float64 |
Cluster Shear Catalogs
The cluster shear catalog is generated in the CLClusterShearCatalogs stage. For each cluster, it lists the source galaxies which are nearby and behind that cluster. It records both the index into the original shear catalog, and the shear values rotated into the cluster frame, plus a distance from the cluster and a weight.
The cluster shear catalog structure is a little complicated - it contains a table of clusters, and for each of those clusters, and index into another table of source galaxies. The columns in the cluster shear catalog are:
The catalog group is a list of clusters, matching the order in the cluster catalog which this came from.
The index group is a list of galaxies around clusters.
Group |
Name |
Kind |
Meaning |
|---|---|---|---|
catalog |
cluster_id |
1D int64 |
The ID number from a cluster in the cluster catalog. |
catalog |
cluster_sample_count |
1D int32 |
The row in the index catalog where galaxies around this cluster start. |
catalog |
cluster_sample_start |
1D int32 |
The number of rows in the index catalog for galaxies around this cluster. |
catalog |
cluster_theta_max_arcmin |
1D float64 |
The maximum distance from the cluster center of included galaxies. |
index |
cluster_index |
1D int64 |
The row in the catalog group where the cluster this galaxy is around is. |
index |
source_index |
1D int64 |
The row of this galaxy in the original shear catalog. |
index |
cross_comp |
1D float64 |
The cross component of the shear, rotated into the cluster frame. |
index |
tangential_comp |
1D float64 |
The tangential component of the shear, rotated into the cluster frame. |
index |
distance_arcmin |
1D float64 |
The distance from the cluster center to this galaxy in arcminutes. |
index |
weight |
1D float64 |
The weight assigned to this galaxy for this cluster. |