Random Catalog Product¶
Data Product Name¶
DpdLE3IDVMSPRandomCatalog
Data Product Custodian¶
IDVMSP
Name of the Schema File¶
euc-le3-id-vmsp-randomcatalog.xsdLast Edited for DPDD Version¶
1.1
Processing Elements Creating / Updating / Using the Product¶
Creators:
VMSP_Sample
Consumers
SEL_Select
SWG-GC, SWG-GAE
Processing function using the data product¶
ID-SEL VMSP pipeline uses this product to produce outputs for LE3 GC.
SWG-GC uses this product.
Proposed for inclusion in EAS/SAS¶
This product is proposed for inclusion in the SAS: yes
The VMSP random catalog product is necessary for the GC-SWG to build additional galaxy samples for verification tests and science analyses.
Data Product Elements¶
- Header:
object of type sys:genericHeader
- Data:
object of type vmsp:vmspRandomCatalog
- QualityFlags:
object of type vmsp:vmspRandomCatalogDqc
- Parameters:
object of type ppr:genericKeyValueParameters
Detailed Description of the Data Product¶
This product contains the random catalog constructed by ID VMSP, which characterizes the spectroscopic selection function of the Euclid Wide survey. The number density of the random catalog is at least 50x that of the galaxy catalog. The catalog consists of randomly sampled positions on the sky (right ascension and declination). In addition, each random point is tagged with galaxy properties, including redshift, fluxes and size. The weight column gives the probability that the random will be detected and measured at the given redshift.
The Euclid Wide survey is partitioned into tiles, and the data product represents a single tile.
The data file is in FITS format and contains a primary HDU and a binary table extension HDU.
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:
Key |
Type |
Description |
|---|---|---|
Area |
float |
Area of the random catalog (deg2). |
Density |
float |
Density of the random catalog (/deg2). |
CalblockIdList |
CalblockIdList |
|
Catalog |
randomCatalogFile |
Pointer to the FITS data file. |
CatalogDescription |
CatalogDescription |
|
IslandLabelList |
IslandLabelList |
|
ObservationIdList |
ObservationIdList |
|
PatchIdList |
PatchIdList |
|
SpatialCoverage |
SpatialCoverage |
|
SpectralCoverage |
SpectralCoverage |
|
TileIndexList |
TileIndexList |
|
VmspCoverageMap |
vmspCoverageMap |
Healpix weight map. |
VmspDetectorFootprintList |
vmspDetectorFootprintList |
The polygon footprint of detectors that overlap this tile. |
FITS Keywords¶
This fits table is expected to contain the following keywords in primary HDU, characterizing the parameters of the product:
Table¶
The table is expected to contain the following columns:
Column name |
Description |
Unit |
|---|---|---|
OBJECT_ID |
Euclid unique source identifier |
NA |
RIGHT_ASCENSION |
Source barycenter RA coordinate (SExtractor ALPHA_J2000) decimal degrees |
deg |
DECLINATION |
Source barycenter DEC coordinate (SExtractor DELTA_J2000) decimal degrees |
deg |
SPE_Z |
The estimated spectroscopic redshift |
NA |
Z_TRUE |
True redshift for interlopers generated by VMSP |
NA |
INTERLOPER_TYPE |
Interloper type generated by VMSP |
NA |
FLUX_VIS_APER_MWCORR |
VIS band source aperture photometry flux (2 FWHM) on PSF-matched images corrected for MW extinction |
uJy |
FLUX_Y_APER_MWCORR |
NIR Y band source aperture photometry flux (2 FWHM) on PSF-matched images corrected for MW extinction |
uJy |
FLUX_J_APER_MWCORR |
NIR J band source aperture photometry flux (2 FWHM) on PSF-matched images corrected for MW extinction |
uJy |
FLUX_H_APER_MWCORR |
NIR H band source aperture photometry flux (2 FWHM) on PSF-matched images corrected for MW extinction |
uJy |
FLUXERR_VIS_APER |
VIS band source aperture photometry flux (2 FWHM) on PSF-matched images error |
uJy |
FLUXERR_Y_APER |
NIR Y band source aperture photometry flux (2 FWHM) on PSF-matched images error |
uJy |
FLUXERR_J_APER |
NIR J band source aperture photometry flux (2 FWHM) on PSF-matched images error |
uJy |
FLUXERR_H_APER |
NIR H band source aperture photometry flux (2 FWHM) on PSF-matched images error |
uJy |
FLUX_LYA_MWCORR |
The estimated flux of the detected line from direct integration corrected for MW extinction |
erg/s/cm2 |
FLUX_OII3727_MWCORR |
The estimated flux of the detected line from direct integration corrected for MW extinction |
erg/s/cm2 |
FLUX_HBETA_MWCORR |
The estimated flux of the detected line from direct integration corrected for MW extinction |
erg/s/cm2 |
FLUX_OIII4960_MWCORR |
The estimated flux of the detected line from direct integration corrected for MW extinction |
erg/s/cm2 |
FLUX_OIII5008_MWCORR |
The estimated flux of the detected line from direct integration corrected for MW extinction |
erg/s/cm2 |
FLUX_HALPHA_TOT_MWCORR |
The estimated flux of the detected line from direct integration corrected for MW extinction |
erg/s/cm2 |
FLUX_SII6732_TOT_MWCORR |
The estimated flux of the detected line from direct integration corrected for MW extinction |
erg/s/cm2 |
FLUX_SIII9068_MWCORR |
The estimated flux of the detected line from direct integration corrected for MW extinction |
erg/s/cm2 |
FLUX_SIII9530_MWCORR |
The estimated flux of the detected line from direct integration corrected for MW extinction |
erg/s/cm2 |
FLUX_LYA_ERROR |
The error on estimated flux of the detected line from direct integration |
erg/s/cm2 |
FLUX_OII3727_ERROR |
The error on estimated flux of the detected line from direct integration |
erg/s/cm2 |
FLUX_HBETA_ERROR |
The error on estimated flux of the detected line from direct integration |
erg/s/cm2 |
FLUX_OIII4960_ERROR |
The error on estimated flux of the detected line from direct integration |
erg/s/cm2 |
FLUX_OIII5008_ERROR |
The error on estimated flux of the detected line from direct integration |
erg/s/cm2 |
FLUX_HALPHA_TOT_ERROR |
Error on total flux of Halpha,NII6549,6585 |
erg/s/cm2 |
FLUX_SII6732_TOT_ERROR |
The error on estimated flux of the detected line from direct integration |
erg/s/cm2 |
FLUX_SIII9068_ERROR |
The error on estimated flux of the detected line from direct integration |
erg/s/cm2 |
FLUX_SIII9530_ERROR |
The error on estimated flux of the detected line from direct integration |
erg/s/cm2 |
POSITION_ANGLE |
Position angle (CCW/x) of the source (SExtractor THETA_IMAGE) range: -90 up to +90 decimal degrees |
deg |
SEMIMAJOR_AXIS |
Semi-major axis of the source (from Asterism) |
pix |
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 |
SPE_Z_REL |
The reliability of estimated Z |
NA |
SPE_GAL_PROB |
The probability of the object to be a galaxy |
NA |
SPE_STAR_PROB |
The probability of the object to be a star |
NA |
SPE_QSO_PROB |
The probability of the object to be a quasar |
NA |
WEIGHT_RAND |
Detection probability weight |
NA |
SIGNAL |
Total signal for detection |
NA |
NOISE |
Total variance for detection |
NA |
N_DITH |
Number of dithers |
NA |
NIR_COVERAGE |
VMPZ coverage mask value in NIR stack |
NA |
VIS_COVERAGE |
VMPZ coverage mask value in VIS |
NA |
VMSP_FLAG |
Bit flag |
NA |
PARAM1 |
Placeholder parameter 1 |
NA |
PARAM2 |
Placeholder parameter 2 |
NA |