SEL-ID Catalog Product

Metadata

Data product name	DpdLE3IDSELIDCatalog
Data product custodian	IDSEL
Name of the Schema file	euc-le3-id-sel-Catalog.xsd
Last Edited for DPDD Version	1.1
Processing Element(s) creating/using the data product	Creators: SEL_Collect Consumers: SEL_Select VMSP_Train VMSP_Sample
Processing function using the data product	ID SEL-VMSP pipeline SWG-GC, SWG-GAE
Proposed for inclusion in EAS/SAS	This product is proposed for inclusion in the SAS: yes The catalog is needed by the GC-SWG for building alternative galaxy samples for verification and science analyses.

Data Product Elements

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

Detailed Description of the Data Product

This is the main galaxy catalog constructed for the spectroscopic galaxy clustering analyses. It contains galaxy properties selected from OU-SPE (spectroscopic) and OU-MER (photometric) measurements.

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.

Milky Way extinction correction

SELID applies the Milky Way extinction correction to the broadband and line fluxes in the SEL catalog. The corrected fluxes are found in the columns with the _MWCORR suffix, for example FLUX_H_APER_MWCORR and FLUX_HALPHA_TOT_MWCORR.

For monocromatic flux, the corrected flux is

\[f_{corr}(\lambda) = f_{obs}(\lambda)10^{0.4 k(\lambda)E_{B-V}}\]

where \(k(\lambda) = A(\lambda)/E_{B-V}\) is the extinction curve. We use the extinction curve from Fitzpatrick 1999 PASP 111 63 with \(R_V=3.1\).

For broadband flux in filter X, we use the coefficient \(C_X\), and the corrected flux is

\[f_{X, corr} = f_{X, obs} 10^{0.4 C_X E_{B-V}}\]

The coefficient is computed as,

\[C_X = -2.5 \log \frac{\int T_X(\lambda) 10^{-0.4 k(\lambda)} \frac{1}{\lambda} d\lambda}{\int T_X(\lambda) \frac{1}{\lambda} d\lambda}\]

This calculation is based on a flat reference SED per unit frequency, \(f_\nu(\nu)=const\), which gives per unit wavelength, \(f_{\lambda}(\lambda)\propto 1/\lambda^2\), and \(T_X(\lambda)\) is the total instrument transmission curve including quantum efficiency.

Using the PLM, filter transmission and quantum efficiency curves in the mission database, we find the following extinction coefficients:

Filter	Coefficient
VIS	2.09
NISP Y	1.03
NISP J	0.702
NISP H	0.474

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
CalblockIdList	CalblockIdList
Catalog	randomCatalogFile	Pointer to the FITS data file.
CatalogDescription	CatalogDescription
IslandLabelList	IslandLabelList
ObservationIdList	ObservationIdList
PatchIdList	PatchIdList
SpatialCoverage	SpatialCoverage
SpectralCoverage	SpectralCoverage
TileIndexList	TileIndexList

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
	FILENAME	Name of fits	string
	CAT_MODE	DATA or RANDOM catalog	string = DATA
	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
	CONFIGID	SEL configuration ID	string
	MSELID	Main selection ID	string
	MSELNAME	Main selection name	string
	MQUERY	Main selection query string	string
	EXTVIS	Extinction coefficient VIS	string
	EXTNISPY	Extinction coefficient Y	string
	EXTNISPJ	Extinction coefficient J	string
	EXTNISPH	Extinction coefficient H	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: 145 columns table
Name	Description	Unit	Format
OBJECT_ID	Euclid unique source identifier	NA	FITS K
TILE_INDEX	MER tile index	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
SPE_Z_ERR	The estimated spectroscopic redshift error	NA	FITS E
SPE_Z_REL	The reliability of estimated Z	NA	FITS E
SPE_Z_PROB	The estimated spectroscopic redshift probability	NA	FITS E
SPE_SUBCLASS	The galaxy sub-classification	NA	FITS 48A
SPE_CONT_SNR	Continuum signal to noise ratio	NA	FITS E
SEL_Z_FLAG	Flag assigned by Internal Data	NA	FITS K
VIS_DET	Flag to indicate if the source is detected in the VIS mosaic (1) or is only detected in the NIR mosaic (0)	NA	FITS I
FLUX_VIS_PSF	VIS band source PSF-fitting photometry flux (TPHOT measurement)	uJy	FITS E
FLUX_Y_TEMPLFIT	NIR Y band source template fitting flux (TPHOT measurement)	uJy	FITS E
FLUX_J_TEMPLFIT	NIR J band source template fitting flux (TPHOT measurement)	uJy	FITS E
FLUX_H_TEMPLFIT	NIR H band source template fitting flux (TPHOT measurement)	uJy	FITS E
FLUXERR_VIS_PSF	VIS band source PSF-fitting photometry flux error (TPHOT measurement)	uJy	FITS E
FLUXERR_Y_TEMPLFIT	NIR Y band source template fitting flux (TPHOT measurement) error	uJy	FITS E
FLUXERR_J_TEMPLFIT	NIR J band source template fitting flux (TPHOT measurement) error	uJy	FITS E
FLUXERR_H_TEMPLFIT	NIR H band source template fitting flux (TPHOT measurement) error	uJy	FITS E
FLUX_LYA	The estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_OII3727	The estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_HBETA	The estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_OIII4960	The estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_OIII5008	The estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_HALPHA_TOT	Estimated total flux of Halpha,NII6549,6585 from direct integration	erg/s/cm2	FITS E
FLUX_SII6732_TOT	Total flux of SII6718,6732 complex from direct integration	erg/s/cm2	FITS E
FLUX_SIII9068	The estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_SIII9530	The estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_LYA_ERROR	The error on estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_OII3727_ERROR	The error on estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_HBETA_ERROR	The error on estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_OIII4960_ERROR	The error on estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_OIII5008_ERROR	The error on estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_HALPHA_TOT_ERROR	Error on total flux of Halpha,NII6549,6585	erg/s/cm2	FITS E
FLUX_SII6732_TOT_ERROR	The error on estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_SIII9068_ERROR	The error on estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
FLUX_SIII9530_ERROR	The error on estimated flux of the detected line from direct integration	erg/s/cm2	FITS E
SNR_LYA	Estimated SNR of the line from direct integration	NA	FITS E
SNR_OII3727	Estimated SNR of the line from direct integration	NA	FITS E
SNR_HBETA	Estimated SNR of the line from direct integration	NA	FITS E
SNR_OIII4960	Estimated SNR of the line from direct integration	NA	FITS E
SNR_OIII5008	Estimated SNR of the line from direct integration	NA	FITS E
SNR_HALPHA_TOT	Estimated SNR of Halpha,NII6549,6585 complex from direct integration	NA	FITS E
SNR_SII6732_TOT	Estimated SNR of the line from direct integration	NA	FITS E
SNR_SIII9068	Estimated SNR of the line from direct integration	NA	FITS E
SNR_SIII9530	Estimated SNR of the line from direct integration	NA	FITS E
FWHM_LYA	Estimated FWHM of the line from Gaussian fit	Angstrom	FITS E
FWHM_OII3727	Estimated FWHM of the line from Gaussian fit	Angstrom	FITS E
FWHM_HBETA	Estimated FWHM of the line from Gaussian fit	Angstrom	FITS E
FWHM_OIII4960	Estimated FWHM of the line from Gaussian fit	Angstrom	FITS E
FWHM_OIII5008	Estimated FWHM of the line from Gaussian fit	Angstrom	FITS E
FWHM_HALPHA	Estimated FWHM of the line from Gaussian fit	Angstrom	FITS E
FWHM_SII6732	Estimated FWHM of the line from Gaussian fit	Angstrom	FITS E
FWHM_SIII9068	Estimated FWHM of the line from Gaussian fit	Angstrom	FITS E
FWHM_SIII9530	Estimated FWHM of the line from Gaussian fit	Angstrom	FITS E
QUAL_LYA	Line measurement quality flag	NA	FITS I
QUAL_OII3727	Line measurement quality flag	NA	FITS I
QUAL_HBETA	Line measurement quality flag	NA	FITS I
QUAL_OIII4960	Line measurement quality flag	NA	FITS I
QUAL_OIII5008	Line measurement quality flag	NA	FITS I
QUAL_HALPHA_TOT	Line measurement quality flag of Halpha,NII6549,6585 complex	NA	FITS I
QUAL_SII6732_TOT	Line measurement quality flag	NA	FITS I
QUAL_SIII9068	Line measurement quality flag	NA	FITS I
QUAL_SIII9530	Line measurement quality flag	NA	FITS I
FLUX_VIS_PSF_MWCORR	VIS band source template fitting flux (TPHOT measurement) corrected for MW extinction	uJy	FITS E
FLUX_Y_TEMPLFIT_MWCORR	NIR Y band source template fitting flux (TPHOT measurement) corrected for MW extinction	uJy	FITS E
FLUX_J_TEMPLFIT_MWCORR	NIR J band source template fitting flux (TPHOT measurement) corrected for MW extinction	uJy	FITS E
FLUX_H_TEMPLFIT_MWCORR	NIR H band source template fitting flux (TPHOT measurement corrected for MW extinction	uJy	FITS E
FLUX_LYA_MWCORR	The estimated flux of the detected line from direct integration corrected for MW extinction	erg/s/cm2	FITS E
FLUX_OII3727_MWCORR	The estimated flux of the detected line from direct integration corrected for MW extinction	erg/s/cm2	FITS E
FLUX_HBETA_MWCORR	The estimated flux of the detected line from direct integration corrected for MW extinction	erg/s/cm2	FITS E
FLUX_OIII4960_MWCORR	The estimated flux of the detected line from direct integration corrected for MW extinction	erg/s/cm2	FITS E
FLUX_OIII5008_MWCORR	The estimated flux of the detected line from direct integration corrected for MW extinction	erg/s/cm2	FITS E
FLUX_HALPHA_TOT_MWCORR	Flux corrected for MW extinction of Halpha,NII6549,6585 complex	erg/s/cm2	FITS E
FLUX_SII6732_TOT_MWCORR	The estimated flux of the detected line from direct integration corrected for MW extinction	erg/s/cm2	FITS E
FLUX_SIII9068_MWCORR	The estimated flux of the detected line from direct integration corrected for MW extinction	erg/s/cm2	FITS E
FLUX_SIII9530_MWCORR	The estimated flux of the detected line from direct integration corrected for MW extinction	erg/s/cm2	FITS E
SEGMENTATION_AREA	Isophotal area of the source above the analysis threshold (SExtractor ISOAREA_IMAGE)	pix	FITS J
SEMIMAJOR_AXIS	Semi-major axis of the source (from Asterism)	pix	FITS E
SEMIMAJOR_AXIS_ERR	Semi-major axis error	pix	FITS E
POSITION_ANGLE	Position angle (CCW/x) of the source (SExtractor THETA_IMAGE) range: -90 up to |90 decimal degrees	deg	FITS E
POSITION_ANGLE_ERR	Position angle error	deg	FITS E
ELLIPTICITY	A parametrization of how stretched an object is in the detection band, computed from the minor and major axes of the object itself (directly from SExtractor)	NA	FITS E
ELLIPTICITY_ERR	Ellipticity error	NA	FITS E
KRON_RADIUS	Major semi-axis (in pixels) of the elliptical aperture used for total (Kron) aperture photometry on the detection image	pix	FITS E
KRON_RADIUS_ERR	Error on the major semi-axis (in pixels) of the elliptical aperture used for total (Kron) aperture photometry on the detection image	pix	FITS E
MU_MAX	Peak surface brightness above the background in the detection band (directly from SExtractor)	mag/arcsec2	FITS E
MUMAX_MINUS_MAG	The difference between MU_MAX and MAG_STARGAL_SEP, valid even for NIR-only sources	mag/arcsec2	FITS E
BINARY_FLAG	Flag for potentially binary stars	NA	FITS I
POINT_LIKE_FLAG	Point-like flag : flag set to 1 for VIS detections with (DET_QUALITY_FLAG==0) AND (POINT_LIKE_PROBA>threshold), otherwise set to NaN	NA	FITS I
POINT_LIKE_PROB	Probability between 0 and 1 that the source is point-like (the estimation uses a “star probability cube” defined in the MDB). Value is set to NaN for NIR-only objects (use MUMAX_MINUS_MAG for NIR-only objcts)	NA	FITS E
EXTENDED_FLAG	Extended source flag	NA	FITS I
EXTENDED_PROB	Probability between 0 and 1 that the source is extended	NA	FITS E
SPURIOUS_FLAG	Spurious source flag	NA	FITS I
SPURIOUS_PROB	Probability between 0 and 1 that the source is spurious	NA	FITS E
DET_QUALITY_FLAG	Detection step flags that could indicate the possible corruption of the MAG_STARGAL_SEP values	NA	FITS I
FLAG_VIS	Objects flag keeping track of the flagged pixels in the VIS flag image	NA	FITS J
FLAG_Y	Objects flag keeping track of the flagged pixels in the NIR Y flag image	NA	FITS J
FLAG_J	Objects flag keeping track of the flagged pixels in the NIR J flag image	NA	FITS J
FLAG_H	Objects flag keeping track of the flagged pixels in the NIR H flag image	NA	FITS J
FLAG_NIR_STACK	Objects flag keeping track of the flagged pixels in the NIR stack flag image	NA	FITS J
VMPZ_COV_VIS	VMPZ coverage map value in VIS	NA	FITS E
VMPZ_COV_Y	VMPZ coverage map value in Y	NA	FITS E
VMPZ_COV_J	VMPZ coverage map value in J	NA	FITS E
VMPZ_COV_H	VMPZ coverage map value in H	NA	FITS E
VMPZ_NOISE_VIS	VMPZ RMS map value in VIS	NA	FITS E
VMPZ_NOISE_Y	VMPZ RMS map value in NIR Y	NA	FITS E
VMPZ_NOISE_J	VMPZ RMS map value in NIR J	NA	FITS E
VMPZ_NOISE_H	VMPZ RMS map value in NIR H	NA	FITS E
PHOT_WEIGHT	photometric selection weight	NA	FITS E
GAL_EBV	Estimated galactic E(B-V) at the source centroid according to the reference Planck map	mag	FITS E
SPE_GAL_PROB	The probability of the object to be a galaxy	NA	FITS E
SPE_STAR_PROB	The probability of the object to be a star	NA	FITS E
SPE_QSO_PROB	The probability of the object to be a quasar	NA	FITS E
SPE_CLASS	SPE class	NA	FITS 8A
SPE_GRISM	SPE grism	NA	FITS 8A
SPE_N_DITH_RED_L	Number of dithers in red computed by SPE at wavelength low	NA	FITS I
SPE_N_DITH_RED_M	Number of dithers in red computed by SPE at wavelength middle	NA	FITS I
SPE_N_DITH_RED_H	Number of dithers in red computed by SPE at wavelength high	NA	FITS I
SPE_N_DITH_BLUE_L	Number of dithers in blue computed by SPE at wavelength low	NA	FITS I
SPE_N_DITH_BLUE_M	Number of dithers in blue computed by SPE at wavelength middle	NA	FITS I
SPE_N_DITH_BLUE_H	Number of dithers in blue computed by SPE at wavelength high	NA	FITS I
SPE_N_DITH_HALPHA	Number of dithers on the Halpha line at best redshift solution	NA	FITS I
SPE_N_DITH_OIII5008	Number of dithers on the OIII 5008 line at best redshift solution	NA	FITS I
SPE_W_MIN	The minimum wavelength	Angstrom	FITS E
SPE_W_MAX	The maximum wavelength	Angstrom	FITS E
SPE_NPIX		NA	FITS I
SPE_LSF	Standard deviation of the Gaussian Line Spread Function model	Angstrom	FITS E
SPE_Z_REDUCED_CHI2	Reduced Chisquare at the estimated z	NA	FITS E
SPE_Z_CONT_REDUCED_CHI2	Continuum Reduced Chisquare at the estimated z	NA	FITS E
SPE_Z_P_VALUE	P-Value at the estimated z	NA	FITS E
SPE_Z_CONT_P_VALUE	Continuum P-Value at the estimated z	NA	FITS E
SPE_Z_RESIDUAL_NORMALITY	Residual normality test (eg Kolmogorov-Smirnov) at the estimated z	NA	FITS E
SPE_Z_CONT_RESIDUAL_NORMALITY	Continuum residual Normality test (eg Kolmogorov-Smirnov) at the estimated z	NA	FITS E
SPE_VEL_DISP_E	The velocity dispersion of emission lines	km/s	FITS E
SPE_Z_1	The estimated spectroscopic redshift of rank 1 redshift solution	NA	FITS E
SPE_Z_REL_1	The reliability of estimated Z of rank 1 redshift solution	NA	FITS E
SPE_Z_PROB_1	The estimated spectroscopic redshift probability of rank 1 redshift solution	NA	FITS E
SPE_Z_2	The estimated spectroscopic redshift of rank 2 redshift solution	NA	FITS E
SPE_Z_REL_2	The reliability of estimated Z of rank 2 redshift solution	NA	FITS E
SPE_Z_PROB_2	The estimated spectroscopic redshift probability of rank 1 redshift solution	NA	FITS E
SPE_Z_3	The estimated spectroscopic redshift of rank 3 redshift solution	NA	FITS E
SPE_Z_REL_3	The reliability of estimated Z of rank 3 redshift solution	NA	FITS E
SPE_Z_PROB_3	The estimated spectroscopic redshift probability of rank 3 redshift solution	NA	FITS E