SPTSZGALCL - South Pole Telescope-Sunyarv-Zel'dovich (SPT-SZ) Survey Catalog
The South Pole Telescope (SPT) is a 10m diameter telescope located at the National Science Foundation Amundsen-Scott South Pole station in Antarctica. From 2008 to 2011 the telescope was used to conduct the SPT-SZ survey, a survey of ~ 2500 deg2 of the southern sky at 95, 150, and 220 GHz. The survey covers a contiguous region from 20h to 7h in Right Ascension and -65 to -40 degrees in Declination (see, e.g., Figure 1 in Story et al. 2013, ApJ, 779, 86) and was mapped to depths of approximately 40, 18, and 70 microK-arcmin at 95, 150, and 220 GHz, respectively.
The authors use optical and in some cases NIR imaging (Blanco Telescope, Magellan/Baade, Magellan/Clay, Swope, MPG/ESO, New Technology Telescope, Spitzer, WISE) to confirm candidates as clusters and to obtain redshifts for confirmed systems (see section 4 of the reference paper for more details). They have also used a variety of facilities to obtain spectroscopic observations of the SPT clusters (including VLT/FORS2 & Gemini/GMOS-S).
This HEASARC table contains the total of 677 cluster candidates which were identified above a signal-to-noise threshold of xi = 4.5 in the 2500 deg2 SPT-SZ survey.
Galaxy clusters discovered via the Sunyaev-Zel'dovich effect in the 2500-square-degree SPT-SZ survey. Bleem L.E., Stalder B., de Haan T., Aird K.A., Allen S.W., Applegate D.E., Ashby M.L.N., Bautz M., Bayliss M., Benson B.A., Bocquet S., Brodwin M., Carlstrom J.E., Chang C.L., Chiu I., Cho H.M., Clocchiatti A., Crawford T.M., Crites A.T., Desai S., Dietrich J.P., Dobbs M.A., Foley R.J., Forman W.R., George E.M., Gladders M.D., Gonzalez A.H., Halverson N.W., Hennig C., Hoekstra H., Holder G.P., Holzapfel W.L., Hrubes J.D., Jones C., Keisler R., Knox L., Lee A.T., Leitch E.M., Liu J., Lueker M., Luong-Van D., Mantz A., Marrone D.P., McDonald M., McMahon J.J., Meyer S.S., Mocanu L., Mohr J.J., Murray S.S., Padin S., Pryke C., Reichardt C.L., Rest A., Ruel J., Ruhl J.E., Saliwanchik B.R., Saro A., Sayre J.T., Schaffer K.K., Schrabback T., Shirokoff E., Song J., Spieler H.G., Stanford S.A., Staniszewski Z., Stark A.A., Story K.T., Stubbs C.W., Vanderlinde K., Vieira J.D., Vikhlinin A., Williamson R., Zahn O., Zenteno A. <Astrophys. J. Suppl. Ser., 216, 27 (2015)> =2015ApJS..216...27B (SIMBAD/NED BibCode)
The SPT SZ galaxy cluster candidate source name, being a J2000.0 position-based source designation registered with the CDS Dictionary of Nomenclature of Celestial Objects, viz., 'SPT-CL JHHMM+DDMM', where the prefix stands for 'South Polar Telescope - Cluster'.
This flag parameter is set to 'C' to indicate that the cluster has X-ray data from the Chandra satellite that are used in the cosmological analysis presented in T. de Haan et al. (in preparation).
The Right Ascension of the galaxy cluster candidate in the selected equinox. This was given in J2000 decimal degrees to a precision of 10-4 degrees in the original table.
The Declination of the galaxy cluster candidate in the selected equinox. This was given in J2000 decimal degrees to a precision of 10-4 degrees in the original table.
The Galactic Longitude of the galaxy cluster candidate.
The Galactic Latitude of the galaxy cluster candidate.
The highest detection significance, xi, in the filtered map.
The best core radius thetac, in arcminutes, corresponding to the detection (see Section 3 of the reference paper).
The integrated Sunyaev-Zel'dovich comptonization YSZ caused by the galaxy cluster candidate within a 0.75 arcminute aperture, in arcminute2, as defined in Section 3.2 of the reference paper.
The uncertainty in the integrated Sunyaev-Zel'dovich comptonization YSZ caused by the galaxy cluster candidate within a 0.75 arcminute aperture, in arcminute2.
This parameter is set to '>' or '>=' if the quoted redshift is a lower limit to the actual redshift (for unconfirmed systems).
The redshift of the galaxy cluster candidate. Values are given for conformed systems (except for the three highest-redshift systems; see Section 5.3 of the reference paper) or a redshift lower limit for unconfirmed systems (see Section 4). Spectroscopic redshifts (those entries with redshift_note = 'S') are quoted without uncertainties, which are typically ~ 0.1% (e.g., Ruel et al. 2014, ApJ, 792, 45).
The uncertainty in the redshift of the galaxy cluster candidate (not given for spectroscopic redshift values).
This flag parameter is set to 'S' to indicate that the redshift of the galaxy cluster candidate is derived from SPT follow-up observations.
The mass of the galaxy cluster candidate (in solar masses times h70-1) enclosed within a radius at which the average density is 500 times the critical density at the cluster redshift for a fixed flat LambdaCDM cosmology. (See Section 6.1 of the reference paper for full details.)
The uncertainty in the mass of the galaxy cluster candidate (in solar masses times h70-1) enclosed within a radius at which the average density is 500 times the critical density at the cluster redshift for a fixed flat LambdaCDM cosmology.
This parameter contains notes on the imaging of the galaxy cluster candidate, coded as follows:
1 = Bright star impedes confirmation. 2 = Possibly biased SZ-center owing to cluster's proximity to the edge of the cluster map; additional cluster offset 1.8 arcmin at z ~ 0.55. 3 = Foreground group at z ~ 0.3. 4 = Foreground group to N at z ~ 0.35. 5 = Foreground group at z ~ 0.1. 6 = Group z ~ 0.2 centered 3 arcmin away from SPT center. 7 = Small group z ~ 0.4 offset 2 arcmin to N. 8 = Low-z group z ~ 0.1. 9 = Very complex region; optical group on NW z~0.4 and another group on SW z ~ 0.65. Confirmed in S12 by 1 method at z = 0.38 +/- 0.04. 10 = Bimodal redshift solution; additional solution z = 0.29. 11 = High stellar density. 12 = Foreground group at z ~ 0.15. 13 = Bimodal redshift solution; additional solution z = 0.41. 14 = Group on SW z ~ 0.4. 15 = System z ~ 0.3 offset 2 arcmin to S. 16 = Possibly biased SZ-center owing to cluster's proximity to the edge of the cluster map. 17 = The mass is biased low by a factor of ~1.5 times owing to contamination from a magnified high-redshift dusty star forming galaxy; see Section 6.4.3 and discussion in Anderson et al. 2011ApJ, 738, 48). 18 = Low-z group at z ~ 0.15 >3 arcmin from SPT center.
This parameter contains additional notes on the galaxy cluster candidate, with numerical codes as specified for the imaging_notes parameter and the following additional alphabetical codes:
a = Strong-Lensing Cluster; b = Cluster masses at low significance are only approximate; see Section 6.1 of the reference paper. c = Cluster masses at low redshift (z < 0.25) may be underestimated; see Section 6.1. d = Confirmed, high-redshift cluster (see Section 5.3).