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South Pole Telescope (SPT)

Product Name
Point Source Catalog
Mission
SPT

Description

This page provides data products associated with the point-source catalog from 771 square degrees of SPT data described in Mocanu et al (2013). The data products include the full three-band source catalog (down to a significance threshold of 4.5 sigma), the differential number counts in each band (total and divided into synchrotron- and dust-dominated counts), the cumulative number counts in each band, and covariance matrices for the synchrotron-dominated number counts and the dust-dominated number counts in each band.


For the point source catalog, the column descriptions are:

1. Source ID: the IAU designation for the SPT-detected source.
2. RA: right ascension (J2000) in degrees.
3. DEC: declination (J2000) in degrees.
4. S/N (95 GHz): detection significance (signal-to-noise ratio) in the 95 GHz band.
5. Sraw (95 GHz): raw flux (uncorrected for flux boosting) in the 95 GHz band.
6. Sbest (95 GHz): median value of de-boosted flux at 95 GHz.
7. dSup (95 GHz): upper error bar (1-sigma normal equivalent) of de-boosted flux at 95 GHz.
8. dSdown (95 GHz): lower error bar (1-sigma normal equivalent) of de-boosted flux at 95 GHz.
9. S/N (150 GHz): detection significance (signal-to-noise ratio) in the 150 GHz band.
10. Sraw (150 GHz): raw flux (uncorrected for flux boosting) in the 150 GHz band.
11. Sbest (150 GHz): median value of de-boosted flux at 150 GHz.
12. dSup (150 GHz): upper error bar (1-sigma normal equivalent) of de-boosted flux at 150 GHz.
13. dSdown (150 GHz): lower error bar (1-sigma normal equivalent) of de-boosted flux at 150 GHz.
14. S/N (220 GHz): detection significance (signal-to-noise ratio) in the 150 GHz band.
15. Sraw (220 GHz): raw flux (uncorrected for flux boosting) in the 220 GHz band.
16. Sbest (220 GHz): median value of de-boosted flux at 220 GHz.
17. dSup (220 GHz): upper error bar (1-sigma normal equivalent) of de-boosted flux at 220 GHz.
18. dSdown (220 GHz): lower error bar (1-sigma normal equivalent) of de-boosted flux at 220 GHz.
19. alpha95150,raw: estimate (from the raw flux in each band) of the 95 GHz-150 GHz spectral index alpha.
20. alpha95150,best: median value of spectral index.
21. d_alpha95150,up: upper error bar (1-sigma normal equivalent) of spectral index.
22. d_alpha95150,down: lower error bar (1-sigma normal equivalent) of spectral index.
23. alpha150220,raw: estimate (from the raw flux in each band) of the 150 GHz-220 GHz spectral index alpha
24. alpha150220,best: median value of spectral index.
25. d_alpha150220,up: upper error bar (1-sigma normal equivalent) of spectral index.
26. d_alpha150220,down: lower error bar (1-sigma normal equivalent) of spectral index.
27. P(alpha > 1.5): fraction of the spectral index posterior probability distribution above the threshold value of 1.5. A higher value of P means the source is more likely to be dust-dominated.
28. Type: source classification (synchrotron- or dust-dominated).
29. Extended flag: flag for extended sources.
30. External counterparts: external catalogs wherein a source has a match with an offset smaller than the chosen association radius. We choose an association radius of 1 arcminute for all catalogs except WISE, where we use 0.5 arcminutes.

For the differential number counts as a function of flux in each band, the column descriptions are:

1. Flux range [low]: Low end of flux bin in which counts were estimated. In units of Jy.
2. Flux range [high]: High end of flux bin in which counts were estimated. In units of Jy.
3. dN/dS total, central: Central value of differential counts (in units of number per square degree per Jy) for all sources detected in the band.
4. dN/dS total, lower error bar: 1-sigma lower error bar for differential counts (in units of number per square degree per Jy) for all sources detected in the band.
5. dN/dS total, upper error bar: 1-sigma upper error bar for differential counts (in units of number per square degree per Jy) for all sources detected in the band.
6. dN/dS synchrotron, central: Same as [3] for synchrotron-dominated sources detected in the band.
7. dN/dS synchrotron, lower error bar: Same as [4] for synchrotron-dominated sources detected in the band.
8. dN/dS synchrotron, upper error bar: Same as [5] for synchrotron-dominated sources detected in the band.
9. dN/dS dust, central: Same as [3] for dust-dominated sources detected in the band.
10. dN/dS dust, lower error bar: Same as [4] for dust-dominated sources detected in the band.
11. dN/dS dust, upper error bar: Same as [5] for dust-dominated sources detected in the band.
12. dN/dS dust (IRAS removed), central: Same as [3] for dust-dominated sources detected in the band, excluding IRAS-FSC counterparts.
13. dN/dS dust (IRAS removed), lower error bar: Same as [4] for dust-dominated sources detected in the band, excluding IRAS-FSC counterparts.
14. dN/dS dust (IRAS removed), upper error bar: Same as [5] for dust-dominated sources detected in the band, excluding IRAS-FSC counterparts.
15. Completeness: Average value of completeness across the flux range given by [1] and [2].

For the cumulative number counts as a function of flux in each band, the column descriptions are:

1. Flux range [low]: Low end of flux bin in which counts were estimated. In units of Jy.
2. Flux range [high]: High end of flux bin in which counts were estimated. In units of Jy.
3. N(>S) total, central: Central value of cumulative counts (in units of number per square degree) for all sources detected in the band.
4. N(>S) total, lower error bar: 1-sigma lower error bar for cumulative counts (in units of number per square degree) for all sources detected in the band.
5. N(>S) total, upper error bar: 1-sigma upper error bar for cumulative counts (in units of number per square degree) for all sources detected in the band.
6. N(>S) synchrotron, central: Same as [3] for synchrotron-dominated sources detected in the band.
7. N(>S) synchrotron, lower error bar: Same as [4] for synchrotron-dominated sources detected in the band.
8. N(>S) synchrotron, upper error bar: Same as [5] for synchrotron-dominated sources detected in the band.
9. N(>S) dust, central: Same as [3] for dust-dominated sources detected in the band.
10. N(>S) dust, lower error bar: Same as [4] for dust-dominated sources detected in the band.
11. N(>S) dust, upper error bar: Same as [5] for dust-dominated sources detected in the band.
12. N(>S) dust (IRAS removed), central: Same as [3] for dust-dominated sources detected in the band, excluding IRAS-FSC counterparts.
13. N(>S) dust (IRAS removed), lower error bar: Same as [4] for dust-dominated sources detected in the band, excluding IRAS-FSC counterparts.
14. N(>S) dust (IRAS removed), upper error bar: Same as [5] for dust-dominated sources detected in the band, excluding IRAS-FSC counterparts.
15. Purity: Average value of purity across the flux range given by [1] and [2].

For the covariance matrices for number counts, the matrix elements in the files are in units of Jy^(-2) and correspond to the flux bins with well-defined number counts.


Additional Details:

  • The information on this page is taken from this SPT page.
  • Mocanu et al. 2013, "Extragalactic millimeter-wave point source catalog, number counts and statistics from 771 square degrees of the SPT-SZ Survey", astro-ph/1306.3470, ADS

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