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ACTSZCLUST - Atacama Cosmology Telescope DR5 Sunyaev-Zel'dovich Cluster Catalog |
HEASARC Archive |
Overview
The catalog of 4195 optically confirmed Sunyaev-Zel'dovich (SZ) selected galaxy clusters were detected with signal-to-noise > 4 in 13,211 deg2 of sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were selected by applying a multi-frequency matched filter to 98- and 150-GHz maps constructed from ACT observations obtained from 2008-2018 and confirmed using deep, wide-area optical surveys. The clusters span the redshift range 0.04 < z < 1.91 (median z = 0.52). The catalog contains 222 z > 1 clusters, and a total of 868 systems are new discoveries. Assuming an SZ-signal vs. mass scaling relation calibrated from X-ray observations, the sample has a 90% completeness mass limit of M500c > 3.8 x 1014Msol, evaluated at z=0.5, for clusters detected at signal-to-noise ratio > 5 in maps filtered at an angular scale of 2.40. The survey has a large overlap with deep optical weak-lensing surveys that are being used to calibrate the SZ-signal mass-scaling relation, such as the Dark Energy Survey (4566 deg2), the Hyper Suprime-Cam Subaru Strategic Program (469 deg2), and the Kilo Degree Survey (825 deg2).Catalog Bibcode
2020arXiv200911043HReferences
Hilton et al. (2020), "The Atacama Cosmology Telescope: A Catalog of > 4000 Sunyaev-Zel'dovich Galaxy Clusters", <arXiv,2009.11043> (2020arXiv200911043H)
Provenance
This HEASARC database table was ingested in February 2021. It contains the ACT DR5 SZ cluster catalog obtained from the LAMDBA website (https://lambda.gsfc.nasa.gov/product/act/actpol_dr5_szcluster_catalog_info.cfm#catalog).Parameters
Name
The source designation in the format ACT-CL JHHMM.m+/-DDMM of the SZ
detection by ACT.
RA
The Right Ascension for the source in the selected equinox. This was given in
the J2000 coordinates in the original table.
Dec
The Declination for the source in the selected equinox. This was given in
the J2000 coordinates in the original table.
LII
The Galactic Longitude corresponding to the source position.
BII
The Galactic Latitude corresponding to the source position.
SNR
The signal-to-noise ratio for the source, optimized over all the filter
scales.
Y_C
The central Comptonization parameter measured using the optimal matched
filter template (i.e., the one that maximizes the SNR).
Y_C_Error
The uncertainty in the central Comptonization parameter measured using the
optimal matched filter template (i.e., the one that maximizes the SNR, given
by the matched_template parameter).
SNR_Fixed
The signal-to-noise ratio at the reference 2.4-arcmin filter scale.
Y_C_Fixed
The central Comptonization parameter measured using the reference 2.4-arcmin
filter template.
Y_C_Fixed_Error
The uncertainty in the central Comptonization parameter measured using the
reference 2.4-arcmin filter template.
Matched_Template
The name of the matched filter template that resulted in the highest SNR
detection of this source.
ACT_Tile_Name
The name of the ACT map tile in which the cluster source was found. The ACT
map tiles typically have dimensions of 10 deg x 5 deg.
Redshift
The adopted redshift of the cluster source.
Redshift_Error
The uncertainty in the adopted redshift of the cluster source, which is given
only for photometric redshifts.
Redshift_Type
The redshift method used to determine the redshifts, where 'spec' means
spectroscopic and 'phot' means photometric.
Ref_Redshift
The reference source of the adopted redshift, as described in Table 2 of the
reference paper.
Mass_500c
The cluster mass that encloses an average density equal to 500 times the
critical density at the cluster redshift, in units of 1014 solar masses,
and estimated assuming the Universal Pressure Profile (UPP; Arnaud et al,
2010) scaling relation to convert the SZ signal to mass.
Mass_500c_Pos_Err
The 1-sigma upper uncertainty in the cluster mass that encloses an average
density equal to 500 times the critical density at the cluster redshift, in
units of 1014 solar masses, and estimated assuming the Universal Pressure
Profile (UPP; Arnaud et al, 2010) scaling relation to convert the SZ signal
to mass.
Mass_500c_Neg_Err
The 1-sigma lower uncertainty in the cluster mass that encloses an average
density equal to 500 times the critical density at the cluster redshift, in
units of 1014 solar masses, and estimated assuming the Universal Pressure
Profile (UPP; Arnaud et al, 2010) scaling relation to convert the SZ signal
to mass.
Mass_500c_Cal
The cluster mass, mass_500s, rescaled using the richness-based weak-lensing
mass calibration factor of 0.71 +/- 0.07 (see Section 4.1 in the reference
paper).
Mass_500c_Cal_Pos_Err
The 1-sigma upper uncertainty in the rescaled cluster mass, mass_500c_cal,
which is the mass_500c mass rescaled using the richness-based weak-lensing
mass calibration factor of 0.71 +/- 0.07 (see Section 4.1 in the reference
paper).
Mass_500c_Cal_Neg_Err
The 1-sigma lower uncertainty in the rescaled cluster mass, mass_500c_cal,
which is the mass_500c mass rescaled using the richness-based weak-lensing
mass calibration factor of 0.71 +/- 0.07 (see Section 4.1 in the reference
paper).
Mass_200m
The cluster mass that encloses an average density equal to 200 times the mean
density at the cluster redshift, in units of 1014 solar masses, converted
from the mass_500c using the Bhattacharya et al (2013) c-M relation.
Mass_200m_Pos_Err
The 1-sigma upper uncertainty in the cluster mass that encloses an average
density equal to 200 times the mean density at the cluster redshift, in units
of 1014 solar masses, converted from the mass_500c using the Bhattacharya
et al (2013) c-M relation.
Mass_200m_Neg_Err
The 1-sigma lower uncertainty in the cluster mass that encloses an average
density equal to 200 times the mean density at the cluster redshift, in units
of 1014 solar masses, converted from the mass_500c using the Bhattacharya
et al (2013) c-M relation.
Mass_500c_Uncorr
The cluster mass that encloses an average density equal to 500 times the
critical density at the cluster redshift, in units of 1014 solar masses,
and estimated assuming the Universal Pressure Profile (UPP; Arnaud et al,
2010) scaling relation to convert the SZ signal to mass, uncorrected for bias
due to the steepness of the cluster mass function and intrinsic scatter.
Mass_500c_Uncorr_Pos_Err
The 1-sigma upper uncertainty in the cluster mass that encloses an average
density equal to 500 times the critical density at the cluster redshift, in
units of 1014 solar masses, and estimated assuming the Universal Pressure
Profile (UPP; Arnaud et al, 2010) scaling relation to convert the SZ signal
to mass, uncorrected for bias due to the steepness of the cluster mass
function and intrinsic scatter.
Mass_500c_Uncorr_Neg_Err
The 1-sigma lower uncertainty in the cluster mass that encloses an average
density equal to 500 times the critical density at the cluster redshift, in
units of 1014 solar masses, and estimated assuming the Universal Pressure
Profile (UPP; Arnaud et al, 2010) scaling relation to convert the SZ signal
to mass, uncorrected for bias due to the steepness of the cluster mass
function and intrinsic scatter.
Mass_200m_Uncorr
The cluster mass that encloses an average density equal to 200 times the mean
density at the cluster redshift, in units of 1014 solar masses, converted
from the mass_500c using the Bhattacharya et al (2013) c-M relation,
uncorrected for bias due to the steepness of the cluster mass function and
intrinsic scatter.
Mass_200m_Uncorr_Pos_Err
The 1-sigma upper uncertainty in the cluster mass that encloses an average
density equal to 200 times the mean density at the cluster redshift, in units
of 1014 solar masses, converted from the mass_500c using the Bhattacharya
et al (2013) c-M relation, uncorrected for bias due to the steepness of the
cluster mass function and intrinsic scatter.
Mass_200m_Uncorr_Neg_Err
The 1-sigma lower uncertainty in the cluster mass that encloses an average
density equal to 200 times the mean density at the cluster redshift, in units
of 1014 solar masses, converted from the mass_500c using the Bhattacharya
et al (2013) c-M relation, uncorrected for bias due to the steepness of the
cluster mass function and intrinsic scatter.
DESY3_Flag
This flag (either 'T' for true or 'F' for false) indicates whether the
cluster falls within the DES Y3 footprint.
Hscs19a_Flag
This flag (either 'T' for true or 'F' for false) indicates whether the
cluster falls within the HSC-SSP S19A footprint.
Kidsdr4_Flag
This flag (either 'T' for true or 'F' for false) indicates whether the
cluster falls within the KiDS DR4 footprint.
Zcluster_Delta
The density contrast statistic measured at the redshift determined by the
zCluster algorithm, based on the available (given by the zcluster_source
parameter) photometry.
Zcluster_Delta_Error
The uncertainty in the density contrast statistic measured at the redshift
determined by the zCluster algorithm, based on the available (given by the
zcluster_source parameter) photometry.
Zcluster_Source
The photometry used for the zCluster algorithm measurements (see Section
3.1.4 in the reference paper): DECaLS (DR8), KiDS (DR4), SDSS (DR12).
RM_SDSS_Flag
This flag (either 'T' for true or 'F' for false) indicates a cross-match with
a redMaPPer-detected cluster in the SDSS footprint (see Rykoff et al. 2014).
RM_SDSS_Lambda
The optical richness measurement for the redMaPPer algorithm in the SDSS
footprint.
RM_SDSS_Lambda_Error
The uncertainty in the optical richness measurement for the redMaPPer
algorithm in the SDSS footprint.
RM_DESY3_Flag
This flag (either 'T' for true or 'F' for false) indicates a cross-match with
a redMaPPer-detected cluster in the DES Y3 footprint.
RM_DESY3_Lambda
The optical richness measurement for the redMaPPer algorithm in the DES Y3
footprint.
RM_DESY3_Lambda_Error
The uncertainty in the optical richness measurement for the redMaPPer
algorithm in the DES Y3 footprint.
CAMIRA_Flag
This flag (either 'T' for true or 'F' for false) indicates a cross-match with
the CAMIRA-detected cluster in the HSCSSP S19A footprint.
CAMIRA_N_Mem
The optical richness measurement for the CAMIRA algorithm in the HSCSSP S19A
footprint.
Optical_RA
Alternative optically-determined right ascension in decimal degrees (J2000),
from a heterogeneous collection of measurements (see ref_optical).
Optical_Dec
Alternative optically-determined declination in decimal degrees (J2000), from
a heterogeneous collection of measurements (see ref_optical).
Ref_Optical
The reference code that indicates the source of the alternative
optically-determined cluster position. One of: AMICO (Maturi et al. 2019),
CAMIRA (Oguri et al. 2018), RM (redMaPPer in SDSS footprint; Rykoff et al.
2014), RMDESY3 (redMaPPer in DES Y3 footprint; Rykoff et al. 2016),
RMDESY3ACT (redMaPPer in DES Y3 footprint using ACT position as a prior;
Rykoff et al. 2016), Vis-BCG (BCG position from visual inspection of
available optical/IR imaging; this work), WHL2015 (position from Wen & Han
2015).
Notes
This parameter contains additional notes regarding the cluster. Possible
notes include:
AGN?
Lensing?
Merger?
Star formation?
Multiple notes are separated by semicolons.
Known_Lens
The name(s) of known strong gravitational lenses within 2 Mpc projected
distance.
Ref_Known_Lens
The reference code(s), which are comma delimited when there are multiple
matches, for the known strong gravitational lenses within 2 Mpc projected
distance. See Table 3 of the reference paper to map the listed codes to the
corresponding reference.
Warning_Message
If present, a warning message related to the redshift measurement for the
cluster.
Contact Person
Questions regarding the ACTSZCLUST database table can be addressed to the HEASARC Help Desk.Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:24:05 EDT
- HEASARC Director: Dr. Andy Ptak
- NASA Official: Dr. Andy Ptak
- Web Curator: J.D. Myers
- Last Modified: 16-Sep-2024