Catalogues

Planck Catalogue of Compact Sources

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 primary header

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)
TELESCOP	String		PLANCK
CREATOR	String		Pipeline Version
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 below described:

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 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*4

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 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 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

Note 1. Source name designations consist of a prefix and a positional qualifier, the latter is in Galactic coordinates and specified as "Glll.ll±bb.bb" where the (l,b) values are truncated. The prefix used in the single band portion of the PCCS is PLCKddd PCCS catalogue at ddd GHz . For example, a source detected at (l,b) = (120.237, 4.231) in the 545 GHz Planck map would be labelled PLCK545 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 has 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 NOT a clear counterpart in one of the catalogues considered as ancillary data but it has been detected by the internal multi-frequency method. 0 – The source has NOT a clear counterpart in one of the catalogues considered as ancillary data and it has NOT been detected by the internal multi-frequency method.