Clusters Detection Output Product from DET-CL

Data Product Name

DpdLE3clDetClusters

Data Product Custodian

CLDET

Name of the Schema File

euc-le3-cl-det-clusters.xsd

Last edited for DPDD version

1.1

Processing Element(s) creating/using the data product

Creators:

  • DET-CL

Consumers:

  • DET-CL

Processing function using the data product

  • LE3, “DET-CL” pipeline

Data Product Elements

Header:

object of type sys:genericHeader

Data:

object of type cl:detectedDETClusters

QualityFlags:

object of type dqc:sqfPlaceHolder

Parameters:

object of type ppr:genericKeyValueParameters

Detailed Description of the Data Product

This output product contains the catalog of DET-CL candidate clusters

XML Keywords

The metadata provided with the output FITS contains the following keywords:

KEYWORDS COMMON TO BOTH DETECTION CODES: GENERAL PARAMETERS

  1. MIN_Z: lower limit of redshift range for cluster detection

  2. MAX_Z: upper limit of redshift range for cluster detection

  3. SNR_THR: the S/N threshold for extracting a detection

KEYWORDS SPECIFIC TO AMICO DETECTION CODE:

  1. CUBE_XY_STEP: size of the RA and Dec bin [deg]

  2. MAX_AREA_DEG: Maximum area for a single tile on which AMICO can run [deg^2]

  3. L_BORDER_DEG: Size of the border defining the detection area [deg]

KEYWORDS SPECIFIC TO PZWAV DETECTION CODE:

  1. DZ: half width of reach redshift slice

  2. ZSTEP: interval between slices

  3. KRN_SCL1: lower scale of kernel, in kpc

  4. KRN_SCL2: larger scale of kernel, in kpc

  5. DR_LIM: radius of matching area for the merging of detected peaks, in kpc

  6. DZ_LIM: redshift depth for the merging of detected peaks

COSMOLOGY PARAMETERS KEYWORDS:

  1. OMEGA_MAT: matter energy density

  2. OMEGA_VAC: vacuum energy density

  3. HUBBLE_PAR: Hubble constant in km/s/(Mpc/h)

  4. W_EQ_STATE: dark energy equation of state

  5. N_EFF: effective number of relativistic species

  6. TEMP_CMB: CMB temperature

Note : Currently, a flat LCDM model is assumed, depending only on HUBBLE_PAR and OMEGA_MAT. The list above allows a broader choice for the cosmological model (wCDM).

KEYWORDS FOR RICH-CL TO MOVE TO THE CCP PIPELINE:

  1. MAX_NB: Maximum number of structures to which a galaxy can be associated

  2. MIN_PROB: Minimum probability for the association to be saved

Clusters FITS file

The FITS file produced by DET-CL contains the following keywords:

Keywords

This fits file is expected to contain the following keywords in the data table HDU, characterising the main parameters of the “clusters detection” product.

COSMOLOGY PARAMETERS KEYWORDS

  1. OMEGA_MAT: matter energy density

  2. OMEGA_VAC: vacuum energy density

  3. HUBBLE_PAR: Hubble constant in km/s/(Mpc/h)

  4. W_EQ_STATE: dark energy equation of state

  5. N_EFF: effective number of relativistic species

  6. TEMP_CMB: CMB temperature

Note : Currently, a flat LCDM model is assumed, depending only on HUBBLE_PAR and OMEGA_MAT. The list above allows a broader choice for the cosmological model (wCDM).

KEYWORDS COMMON TO BOTH DETECTION CODES: GENERAL PARAMETERS

  1. DET_CODE: Name of the detection algorithm (AMICO or PZWAV)

  2. MIN_Z: lower limit of redshift range for cluster detection

  3. MAX_Z: upper limit of redshift range for cluster detection

  4. SNR_THR: the S/N threshold for extracting a detection

KEYWORDS SPECIFIC TO AMICO DETECTION CODE (same keywords as in detclParameters):

  1. CUBE_XY_STEP: Size [deg] of the Amplitude bins in the X- and Y-dimensions

  2. MAX_AREA_DEG: Maximum area [deg^2] allowed for a detection-tile

  3. L_BORDER_DEG: Size [deg] of the border around a detection-tile

  4. MODEL_ID: Name that identifies the adopted model

KEYWORDS SPECIFIC TO PZWAV DETECTION CODE (same keywords as in detclParameters):

  1. DZ: half width of reach redshift slice

  2. ZSTEP: interval between slices

  3. KRN_SCL1: lower scale of kernel, in kpc

  4. KRN_SCL2: larger scale of kernel, in kpc

  5. PIX_DEG: number of sampling pixels per degree

  6. DR_LIM: radius of matching area for the merging of detected peaks, in kpc

  7. DZ_LIM: redshift depth for the merging of detected peaks

Table

The table of the “detclClusters” product is expected to contain the following columns, for each detected cluster :

Column name

Description

Unit

ID_CLUSTER

Identifier number of the detected cluster

RIGHT_ASCENSION_CLUSTER

Right Ascension coordinate (J2000) of the cluster center

deg

DECLINATION_CLUSTER

Declination coordinate (J2000) of the cluster center

deg

Z_CLUSTER

Redshift estimate of the cluster

Z_ERR_CLUSTER

Error associated to the cluster redshift estimate

SNR_CLUSTER

Signal-to-noise ratio of the detection

SNR_UNIQUE_CLUSTER

Signal-to-noise ratio of the detection, from a common definition

RADIUS_CLUSTER

Angular radius associated to the detected cluster

arcmin

RICHNESS_CLUSTER

Absolute richness estimator of the detected cluster

FRAC_MASKED_CLUSTER

Fraction of the cluster area (=f(center,radius)) covered by visibility mask

LAMBDA_STAR_CLUSTER

Lambda star observable

FLAG_EDGE_CLUSTER

Flag stating if the detection is at border of a mask or a field limit

The SNR_CLUSTER, RADIUS_CLUSTER, and RICHNESS_CLUSTER quantities may have different definitions depending on the considered detection code. The user should refer to the SDD and scientific documentation of the corresponding code.