Difference between revisions of "Catalogues"

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The FITS primary header will have the following structure:
 
The FITS primary header will have the following structure:
  
{| border="1" cellpadding="2"
+
{| border="1"  
 
|+ FITS primary header
 
|+ FITS primary header
 
|-
 
|-
| '''FITS Keyword''' || '''Data Type''' || '''Units''' || '''Description'''
+
! FITS Keyword || Data Type || Units || Description
 
|-  
 
|-  
 
|INSTRUME || String || || LFI or HFI
 
|INSTRUME || String || || LFI or HFI
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The Fits extension is composed by several columns below described:
 
The Fits extension is composed by several columns below described:
  
Column Name
+
{| border="1"
Data Type
+
|+ FITS header
Units
+
|-
Description
+
! Column Name || Data Type || Units || Description
Identification
+
|-
NAME
+
!colspan="4"|Identification
String
+
|-
-
+
|NAME || String || || Source name – see Note 1
Source name – see Note 1
+
|}
 +
 
 +
 
 
Source Position
 
Source Position
 
GLON
 
GLON

Revision as of 19:49, 29 November 2012

Planck Catalogue of Compact Sources[edit]

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-DPCHFI-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:

FITS header
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.

Flexible Image Transfer Specification

(Planck) Low Frequency Instrument

(Planck) High Frequency Instrument

Data Processing Center

Full-Width-at-Half-Maximum

To be confirmed

Early Release Compact Source Catalog