Output Product: Tomographic Angular Correlation¶

Data product name¶

TwoPCFWLPosPos2D

Data product custodian¶

2PCF-WL

Data model tag¶

Trunk, commit 18691

Name of the Schema file¶

euc-test-le3-wl-2pcf-PosPos2D.xsd

Schema documentation tag¶

Data product documentation:

Data Product for twoPCFWLPosPos2D.

Documentation for data product element dpdTwoPCFWLPosPos2D:

This product contains the tomographic angular 2PCF.

Documentation for data product element Header:

The generic header of the product

Documentation for data product element Data:

The data of the product

Data product elements¶

Header of type: sys:genericHeader

Data of type: wl2pcf:twoPCFWLPosPos2D

Parameters of type: ppr:genericKeyValueParameters

Processing Element(s) creating/using the data product¶

2PCF-WL

Processing function using the data product¶

SGS pipeline output product to be used by SWGs

Detailed description of the data product¶

This output product is a fits file (see le3.wl.2pcf.output.pospos2d in the following FITS descriptors).

Extra (optional) metadata associated to the FITS container are the following:

SpatialCoverage a description of the spatial footprint [optional, cot:spatialFootprint],
CatalogSelection: describing the selection in the input catalogues [optional, up to 1 element]
- CatalogFileName: the name of the input catalogue [sys:dataFileName]
- CatalogSHE: type of input catalogue [string among “BFD”, “KSB”, “LensMC”,”MomentsML”,”REGAUSS”,”MER_PHZ”, “OTHER” ]
- Selection: selection associated to catalogue [string]
- CatalogUse: for which use case the catalog is employed (=[“PosPos”]) [string among “PosPos”, “PosShear”, “ShearShear”]
- CatalogInfo: whether position or shear information is used in this catalogue [string among “Pos”, “Shear”] (=[“Pos”])
- CatalogOrder: order associated to catalogue for reporting (e.g. BIN_ID1)[int32]

The fits file contains:

a primary array containing important computation parameters as keywords,
binary tables in the next HDUs with angular correlation for specific redshift bins.

Primary Array¶

This fits table is expected to contain the following keywords in primary HDU, characterizing the important parameters of the product:

W_EST: choice of estimator (Landy-Szalay or Hamilton, or DD or DR or RR) [StringKeyword]
THMIN: minimal angular value chosen for spatial binning [DoubleKeyword]
THMAX: maximal angular value chosen for spatial binning [DoubleKeyword]
OATH: maximal open angle value used for the approximation [DoubleKeyword]
THUNIT: unit of spatial distance [StringKeyword]
BINSCALE: if linear or logarithmic scales are used for output [StringKeyword]
COORDSYS: if spherical or cartesian computation of distances [StringKeyword]
SHE_SOFT: which SHE catalogue used (if used) [StringKeyword]
POS_SEL: selection for position catalogue [StringKeyword]
SOFTNAME: name of software used for 2PCF [StringKeyword]
SOFTVERS: version of software used for 2PCF [StringKeyword]

Table (HDU=1…)¶

The following keywords are added to the header of the HDUs:

BIN_ID1: bin for first catalog [IntegerKeyword]
BIN_ID2: bin for second catalog [IntegerKeyword]
EXTNAME: “POSPOS2D_2PCF”

and the columns are:

THETA: mean angular separation in the bin [D, float64]
WTHETA: angular 2PCF values [D, float64]
WEIGHT: total weight for the bin [D, float64]
SQRT_D: Poisson error associated to the bin [D, float64]

Note

Under discussion is the possibility in the future of having as first HDU a summary table with information on the binning for 2PCF tables (HDU>2):

THETA: angular separation (center of spatial bin) [D, float64]
MIN_THETA: minimal angular separation in the bin [D, float64]
MAX_THETA: maximal angular separation in the bin [D, float64]

and in the second hdu a summary table to allow fast access to the HDU corresponding to a particular bin combination:

BIN_ID1: bin for first catalog [J, int32]
BIN_ID2: bin for second catalog [J, int32]
HDU: HDU index [J, int32]