Difference between revisions of "Catalogues"
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===Meta Data ===
===Meta Data ===
Revision as of 14:43, 11 March 2013
Planck Catalogue of Compact Sources
The Planck Catalogue of Compact Sources (PCCS) comprises a set of nine single-frequency source catalogues. The catalogues contain high-reliability sources, both Galactic and extragalactic, detected over the entire sky, making use of the nominal mission data. The PCCS differs in philosophy from the ERCSC in that it puts more emphasis on the completeness of the catalogue, with-out reducing notably the reliability of the detected sources. The greater amount of data, different selection process and the improvements in the calibration and map-making processing (#planck2013-p02,#planck2013-p03 and references therein) help the PCCS to improve upon the performance of the ERCSC.
|Beam FWHM [arcmin]||32.38||27.10||13.30||9.88||7.18||4.87||4.65||4.72||4.39|
|# (|b| > 30º)||572||258||332||599||795||1523||2074||1694||3804|
Before using the PCCS, please read the Cautionary Notes in the PCCS general description section.
For full details, see paper #planck2013-p05.
For a description of the production and validation processes of the PCCS see the corresponding section.
The data obtained from the Planck nominal mission between 2009 August 13 and 2010 November 27, corresponding to operational days 91--636, have been processed into full-sky maps by the HFI and LFI Data Processing Centres (DPCs). A description of the processing can be found in #planck2013-p02,#planck2013-p03. The data consist of two complete sky surveys and 60% of the third survey. This implies that the flux densities of sources obtained from the nominal mission maps are the average of at least two observations. The nine Planck frequency channel maps are used as input to the source detection pipelines. For the high-frequency channels, 353, 545 and 857 GHz, the model of the Zodiacal Light Emission (ZLE) (?) has been subtracted from the maps before detecting the sources. The relevant properties of the frequency maps and main parameters used to generate the catalogues are summarized in Table 1.
The input data used to generate this product are the following:
To be reviewed and compiled by Joaquin/Mark.
Other products that are related and share some commonalities with the product being described here are the other catalogues:
The PCCS source list in each frequency is structured as a FITS binary table having one row for each detected source.
The FITS primary header will have the following structure:
|FITS Keyword||Data Type||Units||Description|
|INSTRUME||String||LFI or HFI|
|VERSION||String||Version of PCCS|
|DATE||String||Date file created:yyyy-mm-dd|
|ORIGIN||String||Name of organization responsible for the data (LFI-DPC – HFI-DPC)|
|DATE-OBS||String||days||Start-up time of the survey: yyyy-mm-dd|
|DATE-END||String||days||Ending time of the survey: yyyy-mm-dd|
The Fits extension is composed by several columns described below:
|Column Name||Data Type||Units||Description|
|NAME||String||Source name – see Note 1|
|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)|
|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 (see Note 4 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|
|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 counting anti-clockwise from the x -axis|
|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|
|Flags and validation|
|EXTENDED||Integer*2||Flag indicated that source is extended|
|CIRRUS_N||Integer*2||Number of sources detected at 857 GHz within HFI TBC degrees|
|EXT_VAL||Integer*2||Flag indicated external validation - see Note 2|
|ERCSC||String||Name of the ERCSC counterpart if any|
|ONLY 857 GHz Catalogue|
|APERFLUX_217||Real*4||mJy||Source flux density at 217 GHz (best estimation) of the object detected at 857|
|APERFLUX_ERR_217||Real*4||mJy||Uncertainty in source flux density at 217 GHz|
|APERFLUX_353||Real*4||mJy||Source flux density at 353 GHz (best estimation) of the object detected at 857|
|APERFLUX_ERR_353||Real*4||mJy||Uncertainty in source flux density at 353 GHz|
|APERFLUX_545||Real*4||mJy||Source flux density at 545 GHz (best estimation) of the object detected at 857|
|APERFLUX_ERR_545||Real*4||mJy||Uncertainty in source flux density at 545 GHz|
Note 1.- Source names consist of a prefix and a position. The prefix used is PCCS1 fff for the catalogue at fff GHz. The position is in Galactic coordinates and specified as "Glll.ll±bb.bb" where the (l,b) values are truncated to two decimal places.
For example, a source detected at (l,b) = (120.237, 4.231) in the 545 GHz Planck map would be labelled PCCS1 545 G120.23±04.23.
Note 2.- 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 criteria for extension being sqrt(GAU_FWHMMAJ * GAU_FWHMIN) > 1.5 times the beam FWHM.
Note 3.- The EXT_VAL flag if provided for the 30, 44 and 70 GHz channels, and takes the value of 0, 1, or 2, based on the following conditions:
- 2 – The source has a clear counterpart in one of the catalogues considered as ancillary data.
- 1 – The source has no clear counterpart in one of the ancillary catalogues but it has been detected by the internal multi-frequency method.
- 0 – The source has no clear counterpart in one of the ancillary catalogues and it has not been detected by the internal multi-frequency method.
Note 4.- The x axis is defined for each source as parallel to the constant colatitude line, with the same direction as the longitude. Therefore the position angles are measured anticlockwise from the x axis.
Below an example of the header.
XTENSION= 'BINTABLE' /Written by IDL: Tue Feb 26 17:50:21 2013 BITPIX = 8 / NAXIS = 2 /Binary table NAXIS1 = 145 /Number of bytes per row NAXIS2 = 1256 /Number of rows PCOUNT = 0 /Random parameter count GCOUNT = 1 /Group count TFIELDS = 24 /Number of columns DATE = '2013-02-26' /Creation date INSTRUME= 'LFI ' /Low Frequency Instrument VERSION = '1.0 ' /Version of PCCS ORIGIN = 'LFI-DPC ' /Organisation responsible for data TELESCOP= 'PLANCK ' /Planck CREATOR = 'Nov12-v03' /Pipeline version DATE-OBS= '2009-08-13' /Start time of the survey DATE-END= '2010-11-26' /End time of the survey EXTNAME = 'PCCS1_f030' /Extension name TFORM1 = '23A ' /Character string TTYPE1 = 'NAME ' /Label for column 1 TUNIT1 = 'None ' /Units of column 1 TFORM2 = '1D ' /Real*8 (double precision) TTYPE2 = 'GLON ' /Label for column 2 TUNIT2 = 'degrees ' /Units of column 2 TFORM3 = '1D ' /Real*8 (double precision) TTYPE3 = 'GLAT ' /Label for column 3 TUNIT3 = 'degrees ' /Units of column 3 TFORM4 = '1D ' /Real*8 (double precision) TTYPE4 = 'RA ' /Label for column 4 TUNIT4 = 'degrees ' /Units of column 4 TFORM5 = '1D ' /Real*8 (double precision) TTYPE5 = 'DEC ' /Label for column 5 TUNIT5 = 'degrees ' /Units of column 5 TFORM6 = '1E ' /Real*4 (floating point) TTYPE6 = 'DETFLUX ' /Label for column 6 TUNIT6 = 'mJy ' /Units of column 6 TFORM7 = '1E ' /Real*4 (floating point) TTYPE7 = 'DETFLUX_ERR' /Label for column 7 TUNIT7 = 'mJy ' /Units of column 7 TFORM8 = '1E ' /Real*4 (floating point) TTYPE8 = 'APERFLUX' /Label for column 8 TUNIT8 = 'mJy ' /Units of column 8 TFORM9 = '1E ' /Real*4 (floating point) TTYPE9 = 'APERFLUX_ERR' /Label for column 9 TUNIT9 = 'mJy ' /Units of column 9 TFORM10 = '1E ' /Real*4 (floating point) TTYPE10 = 'PSFFLUX ' /Label for column 10 TUNIT10 = 'mJy ' /Units of column 10 TFORM11 = '1E ' /Real*4 (floating point) TTYPE11 = 'PSFFLUX_ERR' /Label for column 11 TUNIT11 = 'mJy ' /Units of column 11 TFORM12 = '1E ' /Real*4 (floating point) TTYPE12 = 'GAUFLUX ' /Label for column 12 TUNIT12 = 'mJy ' /Units of column 12 TFORM13 = '1E ' /Real*4 (floating point) TTYPE13 = 'GAUFLUX_ERR' /Label for column 13 TUNIT13 = 'mJy ' /Units of column 13 TFORM14 = '1E ' /Real*4 (floating point) TTYPE14 = 'GAU_SEMI1' /Label for column 14 TUNIT14 = 'arcmin ' /Units of column 14 TFORM15 = '1E ' /Real*4 (floating point) TTYPE15 = 'GAU_SEMI1_ERR' /Label for column 15 TUNIT15 = 'arcmin ' /Units of column 15 TFORM16 = '1E ' /Real*4 (floating point) TTYPE16 = 'GAU_SEMI2' /Label for column 16 TUNIT16 = 'arcmin ' /Units of column 16 TFORM17 = '1E ' /Real*4 (floating point) TTYPE17 = 'GAU_SEMI2_ERR' /Label for column 17 TUNIT17 = 'arcmin ' /Units of column 17 TFORM18 = '1E ' /Real*4 (floating point) TTYPE18 = 'GAU_THETA' /Label for column 18 TUNIT18 = 'degrees ' /Units of column 18 TFORM19 = '1E ' /Real*4 (floating point) TTYPE19 = 'GAU_THETA_ERR' /Label for column 19 TUNIT19 = 'degrees ' /Units of column 19 TFORM20 = '1E ' /Real*4 (floating point) TTYPE20 = 'GAU_FWHM_EFF' /Label for column 20 TUNIT20 = 'arcmin ' /Units of column 20 TFORM21 = '1I ' /Integer*2 (short integer) TTYPE21 = 'EXTENDED' /Label for column 21 TUNIT21 = '0/1 ' /Units of column 21 TNULL21 = -1 /Null value for column 21 TFORM22 = '1I ' /Integer*2 (short integer) TTYPE22 = 'CIRRUS_N' /Label for column 22 TUNIT22 = 'None ' /Units of column 22 TNULL22 = -1 /Null value for column 22 TFORM23 = '1I ' /Integer*2 (short integer) TTYPE23 = 'EXT_VAL ' /Label for column 23 TUNIT23 = '0/1/2 ' /Units of column 23 TNULL23 = -1 /Null value for column 23 TFORM24 = '24A ' /Character string TTYPE24 = 'ERCSC ' /Label for column 24 TUNIT24 = 'None ' /Units of column 24
Early Release Compact Source Catalogue
Note to LM: move this to a separate page
Early Release Compact Source Catalog
(Planck) High Frequency Instrument
(Planck) Low Frequency Instrument
Flexible Image Transfer Specification
Data Processing Center
To be confirmed