SEL-ID Selected Catalog Product

Metadata

Data product name	DpdLE3IDSELIDSubsampledCatalog
Data product custodian	IDSEL
Name of the Schema file	euc-le3-id-sel-SubsampledCatalog.xsd
Last Edited for DPDD Version	1.1
Processing Element(s) creating/using the data product	Creators: SEL_Select Consumers: LE3-GC-2PCF LE3-GC-PK LE3-GC-3PCF LE3-GC-BK SWG-GC
Processing function using the data product	LE3, SGS pipeline output product to be used by SWGs
Proposed for inclusion in EAS/SAS	This product is proposed for inclusion in the SAS: yes The catalog product is needed by the GC-SWG for verification and carrying out alternative science analyses.

Data Product Elements

Header	object of type sys:genericHeader
Data	object of type selid:selIDSubsampledCatalog
QualityFlags	object of type selid:selCatalogDqc
Parameters	object of type ppr:genericKeyValueParameters

Detailed Description of the Data Product

This data product contains the selected Data or Random catalog for the spectroscopic galaxy clustering analyses. It contains a minimal set of columns needed for the clustering analyses, namely the spatial coordinates and a weight.

Note that the Data and Random catalogs share the same data product definition.

This catalog is stored in a FITS file. The second HDU is a binary table extension that contains metadata in the keywords and the catalog in the data table.

Metadata

The metadata stored in the Data element of the XML contains useful information about the survey coverage. Here is a brief summary of the metadata:

Data/

Key	Type	Description
Area	float	Sky area covered by the catalog in deg2
Concatenated	str	Boolean flag to indicate if tile concatenation was done
SelectionID	str	Selection identifier
SelectionName	str	Selection name
CalblockIdList	CalblockIdList
Catalog	randomCatalogFile	Pointer to the FITS data file.
CatalogDescription	CatalogDescription
IslandLabelList	IslandLabelList
ObservationIdList	ObservationIdList
PatchIdList	PatchIdList
RedshiftHistogram	RedshiftHistogram	Histogram of number density along line of sight
SpatialCoverage	SpatialCoverage
SpectralCoverage	SpectralCoverage
TileIndexList	TileIndexList

The RedshiftHistogram element contains the number density along the line of sight. It contains the following elements:

Data/RedshiftHistogram/

Key	Type	Description
BinCount	int	Number of redshift bins
CosmologyID	str	Cosmology identifier
ComovingDensity	ListOfDouble	Comoving number density in units (h/Mpc)3
CountdNdz	ListOfDouble	Differential number count dN/dz in redshift bins
RedshiftBinEdges	ListOfDouble	Edges of redshift bins

Keywords Extension Header CATALOG

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

HDU CATALOG: header
	Name	Description	Value
Keywords	XTENSION		string
	BITPIX		integer
	NAXIS		integer
	NAXIS1		integer
	NAXIS2		integer
	PCOUNT		integer
	GCOUNT		integer
	TFIELDS		integer
	EXTNAME		string
	DATE		string
	CHECKSUM		string
	DATASUM		string
	FILENAME		string
	TELESCOP	Identifiers Mission identifier	string = EUCLID
	INSTRUME	PF identifier	string = LE3IDSELID
	FILENAME	Name of fits	string
	CAT_MODE	DATA or RANDOM catalog	string
	CAT_NAME	ID of Catalog	string
	CAT_NOBJ	Object Number of Catalog	integer
	COORD	coordinate type EQUATORIAL, CARTESIAN, …	string
	ANGLE	angle type RAD or DEG	string = DEG
	COMPLETE	completeness of the sample	double
	PURITY	purity of the sample	double
	CONFIGID	SEL configuration ID	string
	SELID	Selection ID	string
	SELNAME	Selection name	string
	QUERY	Selection query string	string
	MSELID	Main selection ID	string
	MSELNAME	Main selection name	string
	MQUERY	Main selection query string	string
	RSELID	Post-recon selection ID	string
	RSELNAME	Post-recon selection name	string
	RQUERY	Post-recon selection query string	string
	AREA	sky area covered by catalog in square degree	double
	TILEHASH	Hash of tile index list	string
	RECON	Indicates if reconstruction was applied	string
	RECSOFT	Reconstruction software name and version	string
	RECMETH	Reconstruction method	string
	RECBIAS	Reconstruction bias value	double
	RECSMOO	Reconstruction smoothing scale	double
	RECBOX	Reconstruction box size	double
	RECNMESH	Reconstruction mesh size	double
	RECCOSMO	Cosmological parameter set ID for reconstruction	string
	RECINFO	Additional reconstruction metadata	string
	INFO1	Placeholder parameter	string
	INFO2	Placeholder parameter	string
	INFO3	Placeholder parameter	string
	INFO4	Placeholder parameter	string

Table

The table is expected to contain the following columns:

Catalog: 11 columns table
Name	Description	Unit	Format
OBJECT_ID	Euclid unique source identifier	NA	FITS K
RIGHT_ASCENSION	Source barycenter RA coordinate (SExtractor ALPHA_J2000) decimal degrees	deg	FITS D
DECLINATION	Source barycenter DEC coordinate (SExtractor DELTA_J2000) decimal degrees	deg	FITS D
SPE_Z	The estimated spectroscopic redshift	NA	FITS E
WEIGHT	Weight generated by SEL	NA	FITS E
Z_TRUE	True redshift for interlopers generated by VMSP	NA	FITS E
INTERLOPER_TYPE	Interloper type generated by VMSP	NA	FITS I
FLAG	Bit flag	NA	FITS K
PARAM1	Parameter 1	NA	FITS E
PARAM2	Parameter 2	NA	FITS E
TILE_INDEX	MER tile index	NA	FITS K