Difference between revisions of "Catalogues"

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== SZ Catalogue ==
 
== SZ Catalogue ==
  
−
The Planck SZ catalogue is constructed as described in [[Compact_Source_catalogues#Planck_Sunyaev-Zeldovich_catalogue|SZ catalogue]] and in section 2 of {{PlanckPapers|planck2014-a36}}. Three pipelines are used to detect SZ clusters: two independent implementations of the Matched Multi-Filter (MMF1 and MMF3), and PowellSnakes (PwS). The main catalogue is constructed as the union of the catalogues from the three detection methods. The completeness and reliability of the catalogues have been assessed through internal and external validation as described in sections 3-6 of {{PlanckPapers|planck2014-a36}}.
+
The Planck SZ catalogue is constructed as described in [[Compact_Source_catalogues#Planck_Sunyaev-Zeldovich_catalogue|SZ catalogue]] and in sections 2 and 3 of {{PlanckPapers|planck2014-a36}}. Three pipelines are used to detect SZ clusters: two independent implementations of the Matched Multi-Filter (MMF1 and MMF3), and PowellSnakes (PwS). The main catalogue is constructed as the union of the catalogues from the three detection methods. The completeness and reliability of the catalogues have been assessed through internal and external validation as described in section 4 of {{PlanckPapers|planck2014-a36}}.
  
 
The size of a detection is given in terms of the scale size, &theta;<sub>s</sub>, and the flux is given in terms of the total integrated Comptonization parameter, Y = Y<sub>5R500</sub>. The parameters of the GNFW profile assumed by the detection pipelines are written in the headers of the catalogues. For the sake of convenience, the conversion factor from Y to Y<sub>500</sub> is also provided in the header.
 
The size of a detection is given in terms of the scale size, &theta;<sub>s</sub>, and the flux is given in terms of the total integrated Comptonization parameter, Y = Y<sub>5R500</sub>. The parameters of the GNFW profile assumed by the detection pipelines are written in the headers of the catalogues. For the sake of convenience, the conversion factor from Y to Y<sub>500</sub> is also provided in the header.

Revision as of 19:20, 28 January 2015

Catalogue of Compact Sources[edit]

The second Planck Catalogue of Compact Sources (PCCS2) is a set of single-frequency source catalogues extracted from the Planck full-mission maps in intensity and polarization. The catalogues have been constructed as described in PCCS and in section 2 of Planck-2015-A26[1]. The validation of the catalogues is described in section 3 of Planck-2015-A26[1].

The PCCS2 is divided into two sub-catalogues in each frequency channel. The main PCCS2 catalogues consist of the sources detected in regions of the sky where it is possible to estimate the reliability of the detections, either statistically or by using external catalogues. Sources detected in regions of the sky where it is not possible to make an estimate of their reliability have been excluded from the main catalogue, but have been made available as the PCCS2E. By definition, the reliability of the PCCS2 is ≥ 80%, and a flag is available that allows the user to select a subsample of sources with a higher level of reliability (e.g., 90% or 95%).

The nine Planck full-mission frequency channel maps are used as input to the source detection pipelines. They contain 48 months of data for LFI channels and 29 months of data for HFI channels. Therefore the flux densities of sources obtained from the full-mission maps are the average of at least 8 observations for LFI channels or at least 4 observations for HFI channels. The relevant properties of the frequency maps and main parameters used to generate the catalogues are summarized in Tables 1 and 2.

Four different photometry methods have been used. For one of the methods, the native photometry from the Mexican hat wavelet detection algorithm, the analysis is performed on patches containing tangent plane projections of the map. For the other methods (aperture photometry, point spread function fitting, and Gaussian fitting), the analysis is performed directly on the full-sky maps.

PCCS2 in Intensity
Sky distribution of the PCCS2 intensity sources at three different channels: 30 GHz (red circles), 143 GHz (blue circles) and 857 GHz (green circles). The dimension of the circles is related to the brightness of the sources and the beam size of each channel.
PCCS2E in Intensity
Sky distribution of the PCCS2E intensity sources at three different channels: 30 GHz (red circles), 143 GHz (blue circles) and 857 GHz (green circles).

The analysis in polarization has been performed in a non-blind fashion, looking at the position of the sources previously detected in intensity. As a result, polarization flux densities and polarization angles have been measured for hundreds of sources with a significance >99.99%. This high threshold in significance has been chosen to minimize the possibility of misinterpreting a peak of the polarized background as a source. This implies that, in general, most of the polarized sources are very bright, introducing an additional selection effect.

PCCS2 in Polarization
Sky distribution of the PCCS2 polarization sources at three different channels: 30GHz (red circles), 44GHz (green circles) and 70GHz (blue circles).
Sky distribution of the PCCS2 polarization sources at three different channels: 100GHz (red circles), 143GHz (blue circles) and 217GHz (green circles) and 353 GHz (black).
PCCS2E in Polarization
Sky distribution of the PCCS2E polarization sources at three different channels: 30GHz (red circles), 44GHz (green circles) and 70GHz (blue circles).
Sky distribution of the PCCS2E polarization sources at three different channels: 100GHz (red circles), 143GHz (blue circles) and 217GHz (green circles) and 353 GHz (black).


Table 1: PCCS2 and PCCS2E characteristics.
Channel 30 44 70 100 143 217 353 545 857
Frequency [GHz] 28.4 44.1 70.4 100.0 143.0 217.0 353.0 545.0 857.0
Wavelength [μm] 10561 6807 4260 3000 2098 1382 850 550 350
Number of sources
PCCS2 1435 830 1101 1742 2160 2135 1344 1694 4891
PCCS2E 125 104 195 2487 4139 16842 22665 31068 43290
Union PCCS2+PCCS2E 1560 934 1296 4229 6299 18977 24009 32762 48181
Number of sources in the extragalactic zonea.
PCCS2 723 346 441 1742 2160 2135 1344 1694 4891
PCCS2E 22 21 63 0 0 26 289 839 2097
Union PCCS2+PCSS2E 745 367 504 1742 2160 2161 1633 2533 6988
Flux densities [mJy] in the extragalactic zonea .
PCCS2
minimumb 378 621 456 232 147 127 242 535 720
90% completeness 427 692 501 269 177 152 304 555 791
uncertainty 78 127 92 55 35 29 55 105 168
PCCS2E
minimumb 356 494 398 — — 189 350 597 939
90% completeness 468 708 501 — — 144 311 557 927
uncertainty 86 134 95 — — 35 73 144 278

Table 1 Notes

a 30-70 GHz: the extragalactic zone is given by |b| > 30°. 100-857 GHz: outside of galactic region where the reliability cannot be accurately assessed. Note that for the PCCS2E the only sources which occur in this region lie in the filament mask.

b Minimum flux density of the catalogue in the extragalactic zone after excluding the faintest 10% of sources.

Table 2: PCCS2 & PCCS2E polarization characteristics for sources with polarized emission significance > 99.99%
Channel 30 44 70 100 143 217 353
Number of significantly polarized sources in PCCS2 113 29 33 20 25 11 1
Minimum polarized flux densitya [mJy] 117 181 284 138 148 166 453
Polarized flux density uncertainty [mJy] 46 88 91 30 26 30 81
Minimum polarized flux density completeness 90% [mJy] 199 412 397 135 100 136 347
Minimum polarized flux density completeness 95% [mJy] 251 468 454 160 111 153 399
Minimum polarized flux density completeness 100% [mJy] 600 700 700 250 147 257 426
Number of significantly polarized sources in PCCS2E 9 1 1 43 111 325 666
Minimum polarized flux densitya [mJy] 101 2922 398 121 87 114 348
Polarized flux density uncertainty [mJy] 44 254 116 52 44 55 178
Minimum polarized flux density completeness 90% [mJy] — — — 410 613 270 567
Minimum polarized flux density completeness 95% [mJy] — — — 599 893 464 590
Minimum polarized flux density completeness 100% [mJy] — — — 835 893 786 958

Table 2 Notes

a Minimum polarized flux density of the catalogue of significantly polarised sources after excluding the faintest 10% of sources.

Catalogues[edit]

The PCCS2 catalogues are contained in the FITS files:

COM_PCCS_030_R2.02.fits
COM_PCCS_044_R2.02.fits
COM_PCCS_070_R2.02.fits
COM_PCCS_100_R2.01.fits
COM_PCCS_143_R2.01.fits
COM_PCCS_217_R2.01.fits
COM_PCCS_353_R2.01.fits
COM_PCCS_545_R2.01.fits
COM_PCCS_857_R2.01.fits

and the PCCS2E catalogues are contained in the FITS files:

COM_PCCS_030-excluded_R2.02.fits
COM_PCCS_044-excluded_R2.02.fits
COM_PCCS_070-excluded_R2.02.fits
COM_PCCS_100-excluded_R2.01.fits
COM_PCCS_143-excluded_R2.01.fits
COM_PCCS_217-excluded_R2.01.fits
COM_PCCS_353-excluded_R2.01.fits
COM_PCCS_545-excluded_R2.01.fits
COM_PCCS_857-excluded_R2.01.fits

The structure of these files is as follows:

PCCS2/PCCS2E FITS file structure
Extension 0: Primary header, no data
FITS Keyword Data Type Units Description
INSTRUME String Instrument (LFI / HFI)
VERSION String Version of PCCS (PCCS2 / PCCS2_E)
DATE String Date file created: yyyy-mm-dd
ORIGIN String Name of organization responsible for the data (LFI-DPC / HFI-DPC)
TELESCOP String Telescope (PLANCK)
CREATOR String Pipeline Version
DATE-OBS String days Beginning of the survey: yyyy-mm-dd
DATE-END String days End of the survey: yyyy-mm-dd
FWHM Real*4 arcmin FWHM from an elliptical Gaussian fit to the effective beam
OMEGA_B Real*4 arcmin2 Area of the effective beam
FWHM_EFF Real*4 arcmin FWHM computed from OMEGA_B assuming beam is Gaussian
OMEGA_B1 Real*4 arcmin2 Beam area within a radius of 1 × FWHM_EFF
OMEGA_B2 Real*4 arcmin2 Beam area within a radius of 2 × FWHM_EFF
Extension 1: BINTABLE, EXTNAME = PCCS2_fff (where fff is the frequency channel)
Column Name Data Type Units Description
Identification
NAME String Source name (see note 1)
Source position
GLON Real*8 degrees Galactic longitude based on extraction algorithm
GLAT Real*8 degrees Galactic latitude based on extraction algorithm
RA Real*8 degrees Right ascension (J2000) transformed from (GLON,GLAT)
DEC Real*8 degrees Declination (J2000) transformed from (GLON,GLAT)
Photometry
DETFLUX Real*4 mJy Flux density of source as determined by detection method
DETFLUX_ERR Real*4 mJy Uncertainty (1 sigma) in derived flux density from detection method
APERFLUX Real*4 mJy Flux density of source as determined from the aperture photometry
APERFLUX_ERR Real*4 mJy Uncertainty (1 sigma) in derived flux density from the aperture photometry
PSFFLUX Real*4 mJy Flux density of source as determined from PSF fitting
PSFFLUX_ERR Real*4 mJy Uncertainty (1 sigma) in derived flux density from PSF fitting
GAUFLUX Real*4 mJy Flux density of source as determined from 2-D Gaussian fitting
GAUFLUX_ERR Real*4 mJy Uncertainty (1 sigma) in derived flux density from 2-D Gaussian fitting
GAU_SEMI1 Real*4 arcmin Gaussian fit along axis 1 (FWHM; see note 2 for axis definition)
GAU_SEMI1_ERR Real*4 arcmin Uncertainty (1 sigma) in derived Gaussian fit along axis 1
GAU_SEMI2 Real*4 arcmin Gaussian fit along axis 2 (FWHM)
GAU_SEMI2_ERR Real*4 arcmin Uncertainty (1 sigma) in derived Gaussian fit along axis 2
GAU_THETA Real*4 deg Gaussian fit orientation angle (see note 2)
GAU_THETA_ERR Real*4 deg Uncertainty (1 sigma) in derived gaussian fit orientation angle
GAU_FWHM_EFF Real*4 arcmin Gaussian fit effective FWHM
Polarization measurements (30-353 GHz only)
P Real*4 mJy Polarization flux density of the sources as determined by a matched filter (see note 3)
P_ERR Real*4 mJy Uncertainty (1 sigma) in derived polarization flux density (see note 3)
ANGLE_P Real*4 degrees Orientation of polarization with respect to NGP (see notes 2 and 3)
ANGLE_P_ERR Real*4 degrees Uncertainty (1 sigma) in orientation of polarization (see note 3)
APER_P Real*4 mJy Polarization flux density of the sources as determined by aperture photometry (see note 3)
APER_P_ERR Real*4 mJy Uncertainty (1 sigma) in derived polarization flux density (see note 3)
APER_ANGLE_P Real*4 degrees Orientation of polarization with respect to NGP (see notes 2 and 3)
APER_ANGLE_P_ERR Real*4 degrees Uncertainty (1 sigma) in orientation of polarization (see note 3)
P_UPPER_LIMIT Real*4 mJy Polarization flux density 99.99% upper limit. This is provided only when P column is set to NULL; otherwise this column itself contains a NULL.
APER_P_UPPER_LIMIT Real*4 mJy Polarization flux density 99.99% upper limit. This is provided only when APER_P column is set to NULL; otherwise this column itself contains a NULL.
Marginal polarization measurements (100-353 GHz only) – see note 4
P_STAT Integer*2 Polarization detection status
PX Real*4 mJy Polarization flux density of the sources as determined by a matched filter using Bayesian polarization estimator.
PX_ERR_LOWER Real*4 mJy PX uncertainty; lower 95% error bar
PX_ERR_UPPER Real*4 mJy PX uncertainty; upper 95% error bar
ANGLE_PX Real*4 degrees Orientation of polarization with respect to NGP using Bayesian polarization estimator (see note 2)
ANGLE_PX_ERR_LOWER Real*4 degrees ANGLE_PX uncertainty; lower 95% error bar
ANGLE_PX_ERR_UPPER Real*4 degrees ANGLE_PX uncertainty; upper 95% error bar
Flags and validation
EXTENDED Integer*2 Extended source flag (see note 5)
EXT_VAL Integer*2 External validation flag (see note 6)
ERCSC String Name of the ERCSC counterpart, if any
PCCS String Name of the PCCS counterpart, if any
Flags and validation (PCCS2 only)
HIGHEST_RELIABILITY_CAT Integer*4 See note 7
Flags and validation (PCCS2E 100-857 GHz only)
WHICH_ZONE Integer*2 See note 8
Flags and validation (217-857 GHz only)
CIRRUS_N Integer*2 Number of sources (S/N > 5) detected at 857 GHz within a 1-degree radius.
SKY_BRIGHTNESS Real*4 MJy/sr The mean 857 GHz brightness within a 2-degree radius. This may be used as another indicator of cirrus contamination.
Flux densities at other frequencies (857 GHz only)
APERFLUX_217 Real*4 mJy Estimated flux density at 217 GHz
APERFLUX_ERR_217 Real*4 mJy Uncertainty in flux density at 217 GHz
APERFLUX_353 Real*4 mJy Estimated flux density at 353 GHz
APERFLUX_ERR_353 Real*4 mJy Uncertainty in flux density at 353 GHz
APERFLUX_545 Real*4 mJy Estimated flux density at 545 GHz
APERFLUX_ERR_545 Real*4 mJy Uncertainty in flux density at 545 GHz

Notes

  1. Format is PCCS2 fff Glll.ll±bb.bb for sources in the PCCS2 and PCCS2E fff Glll.ll±bb.bb for sources in the PCCS2E, where fff is the frequency channel and (l, b) is the position of the source in Galactic coordinates truncated to two decimal places.
  2. We follow the IAU/IEEE convention (Hamaker & Bregman 1996) for defining the angle of polarization of a source, and this convention is also used for the other angles in the catalogue. The angle is measured from the North Galactic Pole in a clockwise direction from -90 to 90 degrees.
  3. Provided when the significance of the polarization measurement is > 99.99% and set to NULL otherwise.
  4. The P_STAT flag gives the status of the marginal polarization detection, possible values are:
    3 – Bright: P field filled in; all PX fields set to NULL.
    2 – Significant: P field is set to NULL; 0 is outside the PX 95% HPD; all PX fields are filled.
    1 – Marginal: P field is set to NULL; 0 is inside the PX 95% HPD, but mode of PX posterior distribution is not 0; all PX fields are filled.
    0 – No detection: P field is set to NULL; mode of PX posterior distribution is 0; PX_ERRL, ANGLE_PX, ANGLE_PX_ERR_LOWER, and ANGLE_PX_ERR_UPPER are set to NULL.
  5. The EXTENDED flag has the value of 0 if the source is compact and the value of 1 is it extended. The source size is determined by the geometric mean of the Gaussian fit FWHMs, with the criterion for extension being sqrt(GAU_FWHMMAJ * GAU_FWHMIN) > 1.5 times the beam FWHM.
  6. The EXT_VAL flag gives the status of the external validation, possible values are:
    3 – The source has a clear counterpart in one of the catalogues used as ancillary data.
    2 – The source does not have a clear counterpart in one of the catalogues used as ancillary data but it has been detected by the internal multi-frequency method.
    1 – The source does not have a clear counterpart in one of the catalogues used as ancillary data and it has not been detected by the internal multi-frequency method, but it has been detected in a previous Planck source catalogue.
    0 – The source does not have a clear counterpart in one of the catalogues used as ancillary data and it has not been detected by the internal multi-frequency method.
  7. The HIGHEST_RELIABILTY_CAT column contains the highest reliability catalogue to which the source belongs. As the full catalogue reliability is ≥ 80%, this is the lowest possible value in this column. Where possible this is provided in steps of 1% otherwise it is in steps of 5%.
  8. The WHICH_ZONE column encodes the zone in which the source lies:
    1 – source lies inside filament mask.
    2 – source lies inside Galactic zone.
    3 – sources lies in both filament mask and Galactic zone.

Zone map[edit]

For each HFI frequency channel there is an associated map which defines the quantified-reliability (PCCS2) and unquantified-reliability (PCCS2E) zones are on the sky.

The files are called:

COM_PCCS_100-zoneMask_R2.01.fits
COM_PCCS_143-zoneMask_R2.01.fits
COM_PCCS_217-zoneMask_R2.01.fits
COM_PCCS_353-zoneMask_R2.01.fits
COM_PCCS_545-zoneMask_R2.01.fits
COM_PCCS_857-zoneMask_R2.01.fits

The structure of the files is as follows:

Zone map FITS file structure
Extension 0: Primary header, no data
FITS Keyword Data Type Units Description
DATE String Date of creation of file
Extension 1: BINTABLE, HEALPix map (see note 1)
FITS keyword Data Type Value Description
PIXTYPE String HEALPIX HEALPix pixelation
ORDERING String RING Pixel ordering
NSIDE Int*4 2048 HEALPix resolution parameter
NPIX Int*4 50331648 Number of pixels
COORDSYS String G Coordinate system
FREQ_CHL String Frequency channel

Notes

  1. This FITS extension contains an integer HEALPix map which encodes the information on which of 4 possible regions on the sky each pixel belongs to:
    0 – quantified-reliability zone (PCCS2).
    1 – filament mask.
    2 – Galactic zone.
    3 – filament mask and Galactic zone.

S/N threshold map[edit]

For each HFI frequency channel there are a number of maps which contains the S/N threshold used to accept sources into the PCCS2 and PCCS2E catalogues.

For the full catalogue (80% reliability in the quantified reliability zone) they are:

COM_PCCS_100-SN-threshold_R2.01.fits
COM_PCCS_143-SN-threshold_R2.01.fits
COM_PCCS_217-SN-threshold_R2.01.fits
COM_PCCS_353-SN-threshold_R2.01.fits
COM_PCCS_545-SN-threshold_R2.01.fits
COM_PCCS_857-SN-threshold_R2.01.fits

For 85% reliability they are:

COM_PCCS_100-SN-threshold-85pc-reliability_R2.01.fits
COM_PCCS_143-SN-threshold-85pc-reliability_R2.01.fits
COM_PCCS_217-SN-threshold-85pc-reliability_R2.01.fits
COM_PCCS_353-SN-threshold-85pc-reliability_R2.01.fits
COM_PCCS_545-SN-threshold-85pc-reliability_R2.01.fits
COM_PCCS_857-SN-threshold-85pc-reliability_R2.01.fits

For 90% reliability they are:

COM_PCCS_100-SN-threshold-90pc-reliability_R2.01.fits
COM_PCCS_143-SN-threshold-90pc-reliability_R2.01.fits
COM_PCCS_217-SN-threshold-90pc-reliability_R2.01.fits
COM_PCCS_353-SN-threshold-90pc-reliability_R2.01.fits
COM_PCCS_545-SN-threshold-90pc-reliability_R2.01.fits
COM_PCCS_857-SN-threshold-90pc-reliability_R2.01.fits

For 95% reliability they are:

COM_PCCS_100-SN-threshold-95pc-reliability_R2.01.fits
COM_PCCS_143-SN-threshold-95pc-reliability_R2.01.fits
COM_PCCS_217-SN-threshold-95pc-reliability_R2.01.fits
COM_PCCS_353-SN-threshold-95pc-reliability_R2.01.fits
COM_PCCS_545-SN-threshold-95pc-reliability_R2.01.fits
COM_PCCS_857-SN-threshold-95pc-reliability_R2.01.fits

The structure of the files is as follows:

Zone map FITS file structure
Extension 0: Primary header, no data
FITS Keyword Data Type Units Description
DATE String Date of creation of file
Extension 1: BINTABLE, HEALPix map (see note 1)
FITS keyword Data Type Value Description
PIXTYPE String HEALPIX HEALPix pixelation
ORDERING String RING Pixel ordering
NSIDE Int*4 2048 HEALPix resolution parameter
NPIX Int*4 50331648 Number of pixels
COORDSYS String G Coordinate system
FREQ_CHL String Frequency channel

Notes

  1. This FITS extension contains a single precision HEALPix map of the S/N threshold applied in the generation of the catalogue at that position on the sky.

Noise map[edit]

For each HFI frequency channel there is an associated map which contains the detection noise as a function of position on the sky.

The files are called:

COM_PCCS_100-noise-level_R2.01.fits
COM_PCCS_143-noise-level_R2.01.fits
COM_PCCS_217-noise-level_R2.01.fits
COM_PCCS_353-noise-level_R2.01.fits
COM_PCCS_545-noise-level_R2.01.fits
COM_PCCS_857-noise-level_R2.01.fits

The structure of the files is as follows:

Zone map FITS file structure
Extension 0: Primary header, no data
FITS Keyword Data Type Units Description
DATE String Date of creation of file
Extension 1: BINTABLE, HEALPix map (see note 1)
FITS keyword Data Type Value Description
PIXTYPE String HEALPIX HEALPix pixelation
ORDERING String RING Pixel ordering
NSIDE Int*4 2048 HEALPix resolution parameter
NPIX Int*4 50331648 Number of pixels
COORDSYS String G Coordinate system
FREQ_CHL String Frequency channel

Notes

  1. This FITS extension contains a single precision HEALPix map of the detection noise at each location on the sky, in units of Jy.

SZ Catalogue[edit]

The Planck SZ catalogue is constructed as described in SZ catalogue and in sections 2 and 3 of Planck-2015-A27[2]. Three pipelines are used to detect SZ clusters: two independent implementations of the Matched Multi-Filter (MMF1 and MMF3), and PowellSnakes (PwS). The main catalogue is constructed as the union of the catalogues from the three detection methods. The completeness and reliability of the catalogues have been assessed through internal and external validation as described in section 4 of Planck-2015-A27[2].

The size of a detection is given in terms of the scale size, θs, and the flux is given in terms of the total integrated Comptonization parameter, Y = Y5R500. The parameters of the GNFW profile assumed by the detection pipelines are written in the headers of the catalogues. For the sake of convenience, the conversion factor from Y to Y500 is also provided in the header.

The union catalogue contains the coordinates of a detection, its signal-to-noise ratio, an estimate of Y and its uncertainty, together with a summary of the validation information, including external identification of a cluster and its redshift if they are available. The pipeline from which the information is taken is called the reference pipeline. If more than one pipeline makes the same detection, the information is taken from the the pipeline that makes the most significant detection. Where the redshift is known, we provide the SZ mass for the reference pipeline.

The individual catalogues contain the coordinates and the signal-to-noise ratio of the detections, and information on the size and flux of the detections. The entries are cross-referenced to the detections in the union catalogue. The full information on the degeneracy between θs and Y is included in the individual catalogues in the form of the two-dimensional probability distribution for each detection. It is computed on a well-sampled grid to produce a two-dimensional image for each detection. It is provided in this form so it can be combined with a model or external data to produce tighter constraints on the parameters. The individual catalogues also contain Planck measurements of the SZ mass observable, MSZ, as calculated using a Y-M scaling relation and an assumed redshift to break the Y-θs degeneracy. These are provided for each detection as functions of assumed redshift, in the range 0.01 < z < 1, along with the upper and lower 68% confidence limits.

The selection function of the union catalogue, the intersection catalogue and the individual catalogues are provided in additional files. The selection function files contains the probability of detection for clusters of given intrinsic parameters θ500 and Y500. The file includes the definition of the survey area in the form of a HEALPix mask, and is evaluated for a range of signal-to-noise thresholds between 4.5 and 10.

Union catalogue[edit]

The union catalogue is contained in HFI_PCCS_SZ-union_R2.08.fits.

Extension 0: Primary header, no data
FITS Keyword Data Type Units Description
INSTRUME String Instrument (HFI)
VERSION String Version of catalogue
DATE String Date file created: yyyy-mm-dd
ORIGIN String Name of organization responsible for the data (HFI-DPC)
TELESCOP String Telescope (PLANCK)
CREATOR String Pipeline version
DATE-OBS String Start date of the survey: yyyy-mm-dd
DATE-END String End date of the survey: yyyy-mm-dd
PROCVER String Data version
PP_ALPHA Real*4 GNFW pressure profile α parameter
PP_BETA Real*4 GNFW pressure profile β parameter
PP_GAMMA Real*4 GNFW pressure profile γ parameter
PP_C500 Real*4 GNFW pressure profile c500 parameter
PP_Y2YFH Real*4 Conversion factor from Y to Y500
Extension 1: BINTABLE, EXTNAME = PSZ2_UNION
Column Name Data Type Units Description
INDEX Int*4 Index used to cross-reference with individual catalogues
NAME String Source name (see note 1)
GLON Real*8 degrees Galactic longitude
GLAT Real*8 degrees Galactic latitude
RA Real*8 degrees Right ascension (J2000) transformed from (GLON,GLAT)
DEC Real*8 degrees Declination (J2000) transformed from (GLON,GLAT)
POS_ERR Real*4 arcmin Position uncertainty (95% confidence interval)
SNR Real*4 Signal-to-noise ratio of the detection
PIPELINE Int*4 Pipeline from which information is taken (reference pipeline): 1= MMF1; 2 = MMF3; 3 = PwS
PIPE_DET Int*4 Pipelines which detect this object (see note 2)
PCCS2 Bool Indicates whether detection matches with any in PCCS2 catalogues
PSZ Int*4 Index of matching detection in PSZ1, or -1 if new detection
IR_FLAG Int*1 Flag denoting heavy infrared contamination
Q_NEURAL Real*4 Neural network quality flag (see note 3)
Y5R500 Real*4 10-3 arcmin2 Mean marginal Y5R500 as determined by reference pipeline
Y5R500_ERR Real*4 10-3 arcmin2 Uncertainty on Y5R500 as determined by reference pipeline
VALIDATION Int*4 External validation status (see note 4)
REDSHIFT_ID String External identifier of cluster associated with redshift measurement (see note 5)
REDSHIFT Real*4 Redshift of cluster (see note 5)
MSZ Real*4 1014 Msol SZ mass proxy (see note 6)
MSZ_ERR_UP Real*4 1014 Msol Upper bound of 68% SZ mass proxy confidence interval (see note 6)
MSZ_ERR_LOW Real*4 1014 Msol Lower bound of 68% SZ mass proxy confidence interval (see note 6)
MCXC String Identifier of X-ray counterpart in the MCXC, if one is present
REDMAPPER String Identifier of optical counterpart in the RedMAPPer catalogue, if one is present
ACT String Identifier of SZ counterpart in the ACT catalogues, if one is present
SPT String Identifier of SZ counterpart in the SPT catalogues, if one is present
WISE_FLAG Int*4 Confirmation flag of WISE overdensity (see note 7)
AMI_EVIDENCE Real*4 Bayesian evidence for AMI counterpart detection (see note 8)
COSMO Bool Indicates whether detection is in the cosmology sample
COMMENT String Comments on this detection

Notes

  1. Format is PSZ2 Glll.ll±bb.b where (l,b) are the Galactic coordinates truncated to 2 decimal places.
  2. The three least significant decimal digits are used to represent detection or non-detection by the pipelines. Order of the digits: hundreds = MMF1; tens = MMF3; units = PwS. If it is detected then the corresponding digit is set to 1, otherwise it is set to 0.
  3. Neural network quality flag is 1-Qbad, following the definitions in Aghanim et al. 2014.
  4. Summary of the external validation, encoding the most robust external identification: 10 = ENO follow-up; 11 = RTT follow-up; 12 = PanSTARRs; 13 = RedMAPPer non-blind; 14 = SDSS high-z; 15 = AMI; 16 = WISE; 20 = legacy identification from the PSZ1; 21 = MCXC; 22 = SPT; 23 = ACT; 24 = RedMAPPer; 25 = legacy identification from PSZ1 with externally updated redshift; 30 = NED; -1 = no known external counterpart.
  5. Redshift source is the most robust external identification listed in the VALIDATION field.
  6. MSZ is the hydrostatic mass assuming the best-fit Y-M scaling relation of Arnaud 2010 as a prior. The uncertainties are statistical and based on the Planck measurement uncertainties only. Not included in the uncertainties are the statistical errors on the scaling relation, the intrinsic scatter in the relation, or systematic errors in data selection for the scaling relation fit.
  7. Assigned by visual inspection: 0 = no significant galaxy overdensity; 1 = possible galaxy overdensity; 2 = probable galaxy overdensity; 3 = significant galaxy overdensity detected; -1 = possible galaxy overdensity (affected by bright star artefacts); -2 = no significant galaxy overdensity (affected by bright star artefacts); -3 = no assessment possible (affected by bright star artefacts); -10 = not analysed.
  8. Defined in the paper.

Individual catalogues[edit]

The individual pipeline catalogues are contained in the FITS files

Their structure is as follows:

FITS file structure
Extension 0: Primary header, no data
FITS Keyword Data Type Units Description
INSTRUME String Instrument (HFI)
VERSION String Version of catalogue
DATE String Date file created: yyyy-mm-dd
ORIGIN String Name of organization responsible for the data (HFI-DPC)
TELESCOP String Telescope (PLANCK)
CREATOR String Pipeline version
DATE-OBS String Start time of the survey: yyyy-mm-dd
DATE-END String End time of the survey: yyyy-mm-dd
PROCVER String Data version
PP_ALPHA Real*4 GNFW pressure profile α parameter
PP_BETA Real*4 GNFW pressure profile β parameter
PP_GAMMA Real*4 GNFW pressure profile γ parameter
PP_C500 Real*4 GNFW pressure profile c500 parameter
PP_Y2YFH Real*4 Conversion factor from Y to Y500
Extension 1: BINTABLE, EXTNAME = PSZ2_INDIVIDUAL
Column Name Data Type Units Description
INDEX Int*4 Index from union catalogue
NAME String Source name (see note 1)
GLON Real*8 degrees Galactic longitude
GLAT Real*8 degrees Galactic latitude
RA Real*8 degrees Right ascension (J2000) transformed from (GLON, GLAT)
DEC Real*8 degrees Declination (J2000) transformed from (GLON, GLAT)
POS_ERR Real*4 arcmin Position uncertainty (95% confidence interval)
SNR Real*4 Signal-to-noise ratio of detection
TS_MIN Real*4 Minimum value of θs in grid in second extension HDU (see note 2)
TS_MAX Real*4 Maximum value of θs in grid in second extension HDU (see note 2)
Y_MIN Real*4 Minimum value of Y in grid in second extension HDU (see note 2)
Y_MAX Real*4 Maximum value of Y in grid in second extension HDU (see note 2)
Keyword Data Type Value Description
PIPELINE String Name of detection pipeline
Extension 2: IMAGE, EXTNAME = PSZ2_PROBABILITY (see note 2)
Keyword Data Type Value Description
NAXIS1 Integer 256 Dimension 1
NAXIS2 Integer 256 Dimension 2
NAXIS3 Integer Ndet Dimension 3 = Number of detections
Keyword Data Type Value Description
PIPELINE String Name of detection pipeline
Extension 3: IMAGE, EXTNAME = PSZ2_MSZ_ARRAY (see note 3)
Keyword Data Type Value Description
NAXIS1 Integer 100 Dimension 1
NAXIS2 Integer 4 Dimension 2
NAXIS3 Integer Ndet Dimension 3 = Number of detections
Keyword Data Type Value Description
PIPELINE String Name of detection pipeline


Notes

  1. Format PSZ2 Glll.ll±bb.bb where (l, b) are the Galactic coordinates truncated to 2 decimal places.
  2. Extension 2 contains a three-dimensional image with the two-dimensional probability distribution in θs and Y for each detection. The probability distributions are evaluated on a 256 × 256 linear grid between the limits specified in extension 1. The limits are determined independently for each detection. The dimension of the 3D image is 256 × 256 × Ndet, where Ndet is the number of detections. The first dimension is θs and the second dimension is Y.
  3. Extension 3 contains a three-dimensional image with the information on the MSZ observable per cluster as a function of assumed redshift. The image dimensions are 100 × 4 × Ndet, where Ndet is the number of detections. The first dimension is the assumed redshift. The second dimension has size 4: the first element is the assumed redshift value corresponding to the MSZ values. The second element is the MSZ lower 68% confidence bound, the third element is the MSZ estimate and the fourth element is the MSZ upper 68% confidence bound, all in units of 1014 Msol. These uncertainties are based on the Planck measurement uncertainties only. Not included in the error estimates are the statistical errors on the scaling relation, the intrinsic scatter in the relation, or systematic errors in data selection for the scaling relation fit.

Selection function[edit]

The selection function for the union, intersection and individual pipeline catalogues are contained in the FITS files:

Their structure is as follows:

FITS file structure
Extension 0: Primary header, no data
FITS Keyword Data Type Units Description
INSTRUME String Instrument (HFI)
VERSION String Version of catalogue
DATE String Date file created: yyyy-mm-dd
ORIGIN String Name of organization responsible for the data (HFI-DPC)
TELESCOP String Telescope (PLANCK)
CREATOR String Pipeline version
DATE-OBS String Start time of the survey: yyyy-mm-dd
DATE-END String End time of the survey: yyyy-mm-dd
PROCVER String Data version
JOIN String Join type (UNION, INTERSEC, MMF1, MMF3, PwS)
MASK String Mask name (SURVEY, COSMOLOG)
Extension 1: BINTABLE, HEALPix map (see note 1)
FITS keyword Data Type Value Description
PIXTYPE String HEALPIX HEALPix pixelation
ORDERING String RING Pixel ordering
NSIDE Int*4 2048 HEALPix resolution parameter
NPIX Int*4 50331648 Number of pixels
COORDSYS String G Coordinate system
Extension 2: IMAGE, EXTNAME = SELFUNC (see note 2)
Keyword Data Type Value Description
NAXIS1 Integer 30 Dimension 1
NAXIS2 Integer 32 Dimension 2
NAXIS3 Integer 12 Dimension 3
Keyword Data Type Value Description
AXIS1 String CY500 Name of axis 1
AXIS2 String T500 Name of axis 2
AXIS3 String SNRCUT Name of axis 3
UNITS String PERCENT Units of selection function
COMPTYPE String DIFF Type of selection function (differential)
Extension 3: IMAGE, EXTNAME = YGRID (see note 3)
Keyword Data Type Value Description
NAXIS1 Integer 30 Dimension 1
Keyword Data Type Value Description
COL1 String CY500 Grid values of Y500
Extension 4: IMAGE, EXTNAME = TGRID (see note 4)
Keyword Data Type Value Description
NAXIS1 Integer 32 Dimension 1
Keyword Data Type Value Description
COL1 String T500 Grid values of θ500
Extension 5: IMAGE, EXTNAME = SNR_THRESH (see note 5)
Keyword Data Type Value Description
NAXIS1 Integer 12 Dimension 1
Keyword Data Type Value Description
COL1 String S/N Grid values of S/N threshold

Notes

  1. Extension 1 contains a mask defining the survey region, given by an Nside = 2048 ring-ordered HEALPix map in GALACTIC coordinates. Pixels in the survey region have the value 1.0 while pixels outside of the survey region have value 0.0.
  2. Extension 2 contains a three-dimensional image containing the survey completeness probability distribution for various S/N thresholds. The information is stored in an image of size 30 × 32 × 12. The first dimension is Y500, the second dimension is θ500 and the third dimension is the signal-to-noise threshold. The units are percent and lie in the range 0-100 and denote the detection probability of a cluster in the given (Y500, θ500) bin.
  3. Extension 3 contains the Y500 grid values for the completeness data cube in the second extension. It has length 30 and spans the range from 1.12480 × 10-4 arcmin2 to 7.20325 × 10-2 arcmin2 in logarithmic steps.
  4. Extension 4 contains the θ500 grid values for the completeness data cube in the second extension. It has length 32 and spans the range from 0.9416 arcmin to 35.31 arcmin in logarithmic steps.
  5. Extension 5 contains the signal-to-noise threshold grid values for the completeness data cube in the second extension. It has length 12 and contains thresholds from 4.5 to 10.0 in steps of 0.5.

Galactic Cold Core Catalogue[edit]

TBW - Montier

Catalogue of High-Redshift Sources[edit]

TBW - Montier

References[edit]

  1. ↑ 1.01.1 Planck 2015 results. XXVI. The second Planck catalogue of compact sources, Planck Collaboration, 2016, A&A, 594, A26.
  2. ↑ 2.02.1 Planck 2015 results. XXVII. The second Planck catalogue of Sunyaev-Zeldovich sources, Planck Collaboration, 2016, A&A, 594, A27.

(Planck) Low Frequency Instrument

(Planck) High Frequency Instrument

Flexible Image Transfer Specification

Data Processing Center

Full-Width-at-Half-Maximum

Early Release Compact Source Catalog

(Hierarchical Equal Area isoLatitude Pixelation of a sphere, <ref name="Template:Gorski2005">HEALPix: A Framework for High-Resolution Discretization and Fast Analysis of Data Distributed on the Sphere, K. M. Górski, E. Hivon, A. J. Banday, B. D. Wandelt, F. K. Hansen, M. Reinecke, M. Bartelmann, ApJ, 622, 759-771, (2005).

Sunyaev-Zel'dovich

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