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SPT Team
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Project Supported by

NSF, National Science Foundation

KICP, Kavli Institute for Cosmological Physics

USAP, United States Antarctic Program

Antarctic Support Contract (ASC)

DOE Office of Science High Energy Physics



Related Websites

CBI, Cosmic Background Imager

DASI, Degree Angular Scale Interferometer

WMAP, Wilkinson Microwave Anisotropy Probe

Planck



 


This website hosts data products associated with the sample of massive galaxy clusters selected via their Sunyaev-Zel'dovich effect signature from the 2500d SPT-SZ survey. Here we report the locations (R.A, Dec. and redshift), selected mm-wave properties, and estimated masses for these clusters. The masses are determined using a variety of cluster observables and external datasets; more details are provided below.

 
 

Figures

 



Mass-Redshift Distribution of the SPT-SZ cluster sample: Here we compare the 2500 deg2 SPT-SZ cluster catalog to other X-ray and SZ-selected cluster samples. Plotted are the estimated mass versus redshift for the 516 optically-confirmed clusters from the SPT catalog, 220 clusters from the ACT survey (Marriage et al. 2011; Hasselfield et al. 2013, Hilton et al. 2017), 1094 SZ-selected clusters from the Planck survey (Planck Collaboration et al. 2013, 2015) and 740 X-ray clusters selected from the ROSAT all-sky survey (Piffaretti et al. 2011) with M500c > 1 x 1014 Msun h-1 . We mark as lower limits the redshifts of the two high-redshift SPT systems for which the Spitzer redshift-model is poorly constrained (black arrows). We plot clusters in common between the datasets multiple times, using the masses and redshifts reported for each catalog. As described in Bleem et al. 2015, the SPT-masses are determined using the best-fit ξ-Mass scaling relation for a flat LCDM cosmology with Ωm = 0.3, h=0.7 and σ8 = 0.8. (This figure is updated from Figure 6 in Bleem et al. (2015).)

 



Completeness of the Cluster Sample: Fractional completeness as a function of mass for the SPT cluster sample in three different redshift bins: 0.25 < z < 0.5 (solid black), 0.5 < z < 0.75 (dot-dashed red), z > 0.75 (dashed blue). This result is based upon the best-fit ξ-Mass scaling relation for a flat LCDM cosmology with Ωm = 0.3, h=0.7 and σ8 =0.8. The SPT sample is expected to be nearly 100% complete for M500c >7×1014 h-1 Msun at z > 0.25. Adopting the best-fit Planck cosmology shifts the mass thresholds up ~17%. (This is Figure 7 in Bleem et al. (2015).)

 



Weak-lensing calibrated cosmology constraints: νΛCDM constraints on Ωm and σ8. The SPTcl dataset comprises SPT-SZ+WL+Yx, Planck is TT+lowTEB, KiDS+GAMA and DES Y1 are cosmic shear+galaxy clustering+galaxy-galaxy-lensing. The WtG (X-ray selected clusters) result also contains their fgas measurement. (This is Figure 6 in Bocquet et al. (2018).)

 



The evolution of σ8 as a function of redshift. The red band shows the $1\sigma$ interval of the prediction obtained from Planck in the νΛCDM cosmology. The blue data points are obtained in a joint SPTcl+Planck analysis, where σ8(z) is constrained only by the cluster sample. Orange data points are obtained from a similar analysis that allows for more freedom in the SZ scaling relation (see paper). The nearly horizontal error bars on the blue and orange data points indicate the extent of the redshift bins and are shaped to follow the evolution of σ8 in the νΛCDM model. For comparison, green data points show constraints from the cross-correlation of the galaxy density in the Dark Energy Survey with CMB lensing from SPT (Giannantonio et al. 2016). (This is Figure 14 in Bocquet et al. (2018).)

 
 

Catalog Products

 

Catalog Reference Description
SPT-SZ 2500d catalog
(updated redshifts)
Bocquet et al. (2018) Updated calibration of the photometric redshifts and additional spectroscopic redshifts. We provide updated mass estimates using the best-fit ξ-mass scaling relation for a flat LCDM cosmology with Ωm = 0.3, h=0.7 and σ8 = 0.8, and mass estimates marginalized over all scaling relation and cosmology parameters from the weak-lensing calibrated cosmology analysis.
Fiducial SPT-SZ 2500d catalog Bleem et al. (2015) For each cluster candidate we provide the position, the highest detection significance in filtered SPT maps (and the core radii corresponding to the detection), the integrated YSZ within a 0.75 arcmin aperture, redshift information and—for each confirmed cluster—a mass estimate. Masses are determined using the best-fit ξ-mass scaling relation for a flat LCDM cosmology with Ωm = 0.3, h=0.7 and σ8 = 0.8.
SPT-SZ 2500d catalog
(Planck cosmology)
Bleem et al. (2015) Same as fiducial catalog, but with masses determined using the best-fit ξ-mass scaling relation for the best-fit Planck cosmology.
SPT-SZ 2500d catalog
(velocity-dispersion calibrated masses)
Bocquet et al. (2015) Same as fiducial catalog, but with masses derived from a velocity dispersion-based mass calibration. These mass estimates are marginalized over both cosmological and scaling relation parameters; the best fit values of these parameters can be found in Table 1 in Bocquet et al. 2015. In particular we publish here masses derived using the 720d SPT cluster sample (Reichardt et al. 2013) the BBN, H0 priors and 63 SPT clusters with velocity dispersion measurements.


If you have any questions regarding these datasets or their use, please contact Lindsey Bleem (lbleem_at_anl.gov) or Sebastian Bocquet (sebastian.bocquet_at_physik.lmu.de).

 
 

Additional Resources

 

Data Release from NOAO Survey Program SPT-GMOS: A Gemini/GMOS-South Spectroscopic Survey of Galaxy Clusters in the SPT-SZ Survey Details of this program can be found in Bayliss et. al 2016

First SPT Spectroscopic Data Release Spectroscopy of Galaxies in Massive Clusters: Galaxy Properties and Dynamical Cluster Mass Calibration
Details of this program can be found in Ruel et. al 2014

 
 

Quick Links

 

Papers

Bocquet et al. 2018 Cluster Cosmology Constraints from the South Pole Telescope 2500 deg2SZ Survey:Inclusion of Weak Gravitational Lensing Data from Magellan and the Hubble Space Telescope here

Bayliss et al. 2016 SPT-GMOS: A Gemini/GMOS-South Spectroscopic Survey of Galaxy Clusters in the SPT-SZ Survey here

de Haan et al. 2016 Cosmological Constraints from Galaxy Clusters in the 2500 square-degree SPT-SZ Survey here

Bleem et al. 2015 Galaxy Clusters Discovered via the Sunyaev-Zel'dovich Effect in the 2500-square-degree SPT-SZ survey here

Bocquet et al. 2015 Mass Calibration and Cosmological Analysis of the SPT-SZ Galaxy Cluster Sample Using Velocity Dispersion, σv, and X-ray YX Measurements here

Ruel et al. 2014. Optical Spectroscopy and Velocity Dispersions of Galaxy Clusters from the SPT-SZ Survey here


 
 
KICP Berkeley UIUC Case JPL Harvard-Smithsonian McGill U CU Boulder

Contact:

   

jchyde.uchicago.edu

Webmaster:

   

egaltsevakicp.uchicago.edu

Last update:

   

September 7, 2011