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SPTSZSPSC - South Pole Telescope Sunyaev-Zeldovich Survey Point Source Catalog

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Overview

This table contains a a point-source catalog from 771 deg2 of the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey at 95, 150, and 220 GHz. 1,545 sources are detected above 4.5-sigma significance in at least one band. Based on their relative brightness between survey bands, the authors classify the sources into two populations, one dominated by synchrotron emission from active galactic nuclei, and one dominated by thermal emission from dust-enshrouded star-forming galaxies. They find 1,238 synchrotron and 307 dusty sources. The authors cross-match all sources against external catalogs and find 189 unidentified synchrotron sources and 189 unidentified dusty sources. The dusty sources without counterparts are good candidates for high-redshift, strongly lensed sub-millimeter galaxies. The authors derive number counts for each population from 1 Jy down to roughly 11, 4, and 11 mJy at 95, 150, and 220 GHz, respectively. They compare these counts with galaxy population models and find that none of the models they consider for either population provide a good fit to the measured counts in all three bands. The disparities imply that these measurements will be an important input to the next generation of millimeter-wave extragalactic source population models.

The SPT is a 10-m telescope located at the Amundsen-Scott South Pole station in Antarctica. At 150 GHz (2 mm), the SPT has arcminute angular resolution and a 1 deg2 diffraction-limited field of view. The SPT was designed for high-sensitivity millimeter/sub-millimeter observations of faint, low-contrast sources, such as CMB anisotropies. The first survey with the SPT, designated as the SPT-SZ survey, was completed in 2011 November and covers a ~2500 deg2 region of the southern extragalactic sky in three frequency bands, 95, 150, and 220 GHz, corresponding to wavelengths of 3.2, 2.0, and 1.4 mm. The fields were surveyed to depths of approximately 40, 18, and 70 microK arcmin at 95, 150, and 220 GHz, respectively.

This study uses data from five fields observed by the SPT in 2008 and 2009. The fields are referred to using the J2000 coordinates of their centers, Right Ascension in hours and Declination in degrees. Table 1 in the reference paper lists the positions and effective areas of these fields. These are the same fields used for the CMB power spectrum analysis in Keisler et al. (2011, ApJ, 743, 28). The total effective area used for the catalog and analysis in this present work is 771 deg2. The authors use the previously released catalog exactly as it was analyzed in Vieira et al. (2010, ApJ, 719, 763) and add 684 deg2 of newly analyzed data.


Catalog Bibcode

2013ApJ...779...61M

References

Extragalactic Millimeter-wave Point-source Catalog, Number Counts and
Statistics from 771 square degrees of the SPT-SZ Survey

    Mocanu L.M., Crawford T.M., Vieira J.D., Aird K.A., Aravena M.,
    Austermann J.E., Benson B.A., Bethermin M., Bleem L.E., Bothwell M.,
    Carlstrom J.E., Chang C.L., Chapman S., Cho H.-M., Crites A.T., de Haan T.,
    Dobbs M.A., Everett W.B., George E.M., Halverson N.W., Harrington N.,
    Hezaveh Y., Holder G.P., Holzapfel W. L., Hoover S., Hrubes J. D.,
    Keisler R., Knox L., Lee A.T., Leitch E.M., Lueker M., Luong-Van D.,
    Marrone D.P., McMahon J.J., Mehl J., Meyer S.S., Mohr J.J., Montroy T.E.,
    Natoli T., Padin S., Plagge T., Pryke C., Rest A., Reichardt C.L.,
    Ruhl J.E., Sayre J.T., Schaffer K.K., Shirokoff E., Spieler H.G.,
    Spilker J.S., Stalder B., Staniszewski Z., Stark A.A., Story K.T.,
    Switzer E.R., Vanderlinde K., Williamson R.
   <Astrophysical Journal, Volume 779, article id. 61, 22 pp. (2013)>
   =2013ApJ...779...61M

Provenance

This table was created by the HEASARC in January 2014 based on a machine-readable version of Table 4 from the reference paper which was obtained from the ApJ web site.

Parameters

Name
The IAU J2000.0 position-based designation for the SPT detected source, using the prefix 'SPT-S' for 'South Polar Telescope-Sunyaev-Zel'dovich'.

RA
The Right Ascension of the mm source in the selected equinox. The RA was given in J2000.0 decimal degrees to a precision of 0.001 degrees (3.6 arcseconds) in the original table.

Dec
The Declination of the mm source in the selected equinox. The Dec was given in J2000.0 decimal degrees to a precision of 0.001 degrees (3.6 arcseconds) in the original table.

LII
The Galactic Longitude of the mm source.

BII
The Galactic Latitude of the mm source.

SNR_95_GHz
The detection significance (S/N) of the mm source in the 95-GHz band. To be included in this catalog, a source has to have at least a 4.5-sigma or greater significance in at least one band.

Raw_Flux_95_GHz
The raw flux density of the mm source, i.e., uncorrected for flux density boosting, in the 95-GHz band, in mJy.

Flux_95_GHz
The deboosted flux density of the source at 95 GHz, in mJy. This value, the value plus the positive error and the value minus the negative value encompass 16%, 50%, and 84% (68% probability enclosed, or 1 sigma for the equivalent normal distribution) of the cumulative posterior probability density for the 95-GHz flux, as estimated using the deboosting procedure described in Section 3 of the reference paper.

Flux_95_GHz_Pos_Err
The upper (positive) 1-sigma uncertainty in the deboosted 95-GHz band flux density, in mJy.

Flux_95_GHz_Neg_Err
The lower (negative) 1-sigma uncertainty in the deboosted 95-GHz band flux density, in mJy.

SNR_150_GHz
The detection significance (S/N) of the mm source in the 150-GHz band. To be included in this catalog, a source has to have at least a 4.5-sigma or greater significance in at least one band.

Raw_Flux_150_GHz
The raw flux density of the mm source, i.e., uncorrected for flux density boosting, in the 150-GHz band, in mJy.

Flux_150_GHz
The deboosted flux density of the source at 150 GHz, in mJy. This value, the value plus the positive error and the value minus the negative value encompass 16%, 50%, and 84% (68% probability enclosed, or 1 sigma for the equivalent normal distribution) of the cumulative posterior probability density for the 150-GHz flux, as estimated using the deboosting procedure described in Section 3 of the reference paper.

Flux_150_GHz_Pos_Err
The upper (positive) 1-sigma uncertainty in the deboosted 150-GHz band flux density, in mJy.

Flux_150_GHz_Neg_Err
The lower (negative) 1-sigma uncertainty in the deboosted 150-GHz band flux density, in mJy.

SNR_220_GHz
The detection significance (S/N) of the mm source in the 220-GHz band. To be included in this catalog, a source has to have at least a 4.5-sigma or greater significance in at least one band.

Raw_Flux_220_GHz
The raw flux density of the mm source, i.e., uncorrected for flux density boosting, in the 220-GHz band, in mJy.

Flux_220_GHz
The deboosted flux density of the source at 220 GHz, in mJy. This value, the value plus the positive error and the value minus the negative value encompass 16%, 50%, and 84% (68% probability enclosed, or 1 sigma for the equivalent normal distribution) of the cumulative posterior probability density for the 220-GHz flux, as estimated using the deboosting procedure described in Section 3 of the reference paper.

Flux_220_GHz_Pos_Err
The upper (positive) 1-sigma uncertainty in the deboosted 220-GHz band flux density, in mJy.

Flux_220_GHz_Neg_Err
The lower (negative) 1-sigma uncertainty in the deboosted 220-GHz band flux density, in mJy.

Raw_Spectral_Index_1
The estimate of the spectral index of the mm source between 95 and 150 GHz based on the raw flux densities in each band. This is defined as the slope of the assumed power-law behavior of the flux density as a function of frequency between 95 and 150 GHz.

Spectral_Index_1
The estimate of the spectral index of the mm source between 95 and 150 GHz based on the deboosted flux densities in each band. This value, the value plus the positive error and the value minus the negative value encompass 16%, 50%, and 84% (68% probability enclosed, or 1 sigma for the equivalent normal distribution) of the cumulative posterior probability density for the spectral index, as estimated using the fluxes estimated from the deboosting procedure described in Section 3 of the reference paper.

Spectral_Index_1_Pos_Err
The upper (positive) 1-sigma uncertainty in the deboosted spectral index of the spectrum between 95 and 150 GHz.

Spectral_Index_1_Neg_Err
The lower (negative) 1-sigma uncertainty in the deboosted spectral index of the spectrum between 95 and 150 GHz.

Raw_Spectral_Index_2
The estimate of the spectral index of the mm source between 150 and 220 GHz based on the raw flux densities in each band. This is defined as the slope of the assumed power-law behavior of the flux density as a function of frequency between 150 and 220 GHz.

Spectral_Index_2
The estimate of the spectral index of the mm source between 150 and 220 GHz based on the deboosted flux densities in each band. This value, the value plus the positive error and the value minus the negative value encompass 16%, 50%, and 84% (68% probability enclosed, or 1 sigma for the equivalent normal distribution) of the cumulative posterior probability density for the spectral index, as estimated using the the fluxes estimated from the deboosting procedure described in Section 3 of the reference paper.

Spectral_Index_2_Pos_Err
The upper (positive) 1-sigma uncertainty in the deboosted spectral index of the spectrum between 150 and 220 GHz.

Spectral_Index_2_Neg_Err
The lower (negative) 1-sigma uncertainty in the deboosted spectral index of the spectrum between 150 and 220 GHz.

Frac_Sippd_Gt_Threshold
The fraction P(SI150-220 > 1.5) of the 150-220 GHz spectral index posterior probability density above the threshold value of 1.5. A higher value of P means the source is more likely to be dust dominated. This is detailed in Section 3.6 of the reference paper.

Source_Type
The mm source classification (synchrotron or dust dominated), based on whether P(SI150-220 > 1.5) is greater than or less than 0.5.

Extended_Flag
This flag parameter is set to 'Y' for extended sources, else is set to 'N'.

Ctrpart_Catalogs
This field contains numerical codes for external catalogs wherein a source has a match with an offset smaller than the chosen association radius, or 'none' if there are no matches. As described in Section 4.5 of the reference paper, the authors chose an association radius of 1 arcminute for all catalogs except WISE, where they used 0.5 arcminutes.

The authors searched several external catalogs for counterparts at the positions of all sources in the catalog. They queried the following catalogs which are coded as follows:

  Code                   Catalog

  1 - The Sydney University Molonglo Sky Survey (SUMSS; Mauch et al. 2003,
      MNRAS, 324, 1117) at 36 cm (843 MHz).
  2 - The Parkes-MIT-NRAO (PMN; Wright et al. 1994, ApJS, 91, 111) Southern
      Survey at 4850 MHz.
  3 - The Australia Telescope 20 GHz Survey (AT20G: Murphy et al. 2010, MNRAS,
      402, 2403) at 1.5 cm.
  4 - The IRAS Faint Source Catalog (IRAS-FSC; Moshir et al. 1992, IRAS Faint
      Source Survey) at 60 and 100 micron.
  5 - The WISE Source Catalog at 22 micron (W4).
  6 - The AKARI/FIS Bright Source Catalog (Yamamura et al. 2010, ISAS/JAXA) at
      65, 90, 140, and 160 micron and the AKARI/IRC Point Source Catalog
      (Ishihara et al. 2010, A&A, 514, A1) at 9 and 18 micron.
  7 - The Planck Catalog of Compact Sources (PCCS, Planck Collaboration et al.
      2013, Paper XXVIII) at 30, 44, 70, 100, 143, 217, 353, 545, and 857 GHz
      (1 cm to 350 micron).
  8 - The ROSAT All-Sky Survey Bright Source Catalog (RASS-BSC: Voges et al.
      1999, A&A, 349, 389) and the RASS Faint Source Catalog (RASS-FSC: Voges
      et al. 2000, CDS Cat. IX/29).
  

Contact Person

Questions regarding the SPTSZSPSC database table can be addressed to the HEASARC User Hotline.

Page Author: Browse Software Development Team
Last Modified: 5-Feb-2014