Source list columns

The following table lists the columns that are present in the single-band source lists provided in KiDS-ESO-DR1. A large number (27) of aperture fluxes, are provided to suit the needs of different users and allow interpolation to estimate e.g. aperture corrections. Only the columns for the smallest aperture (2 pixels, or 0.4 arcsec diameter) and the largest aperture (200 pixels, or 40 arcsec diameter) are listed in the table. Note: the label for the aperture of 28.5 pixels is FLUX_APER_28p5.

Label	Format	Unit	Description
2DPHOT	J	Source	classification (see section on star/galaxy separation)
X_IMAGE	E	pixel	Object position along x
Y_IMAGE	E	pixel	Object position along y
NUMBER	J		Running object number
CLASS_STAR	E		S-Extractor S/G classifier
FLAGS	J		Extraction flags
IMAFLAGS_ISO	J		FLAG-image flags OR'ed over the iso. profile
NIMAFLAG_ISO	J		Number of flagged pixels entering
IMAFLAGS_ISO	J		Number of flagged pixels entering IMAFLAGS_ISO
FLUX_RADIUS	E	pixel	Fraction-of-light radii
KRON_RADIUS	E	pixel	Kron apertures in units of A or B
FWHM_IMAGE	E	pixel	FWHM assuming a gaussian core
ISOAREA_IMAGE	J	pixel²	Isophotal area above Analysis threshold
ELLIPTICITY	E		1 - B_IMAGE/A_IMAGE
THETA_IMAGE	E	deg	Position angle (CCW/x)
MAG_AUTO	E	mag	Kron-like elliptical aperture magnitude
MAGERR_AUTO	E	mag	RMS error for AUTO magnitude
ALPHA_J2000	D	deg	Right ascension of baryleft (J2000)
DELTA_J2000	D	deg	Declination of baryleft (J2000)
FLUX_APER_2	E	count	Flux vector within circular aperture of 2 pixels
...	...	...	...
FLUX_APER_200	E	count	Flux vector within circular aperture of 200 pixels
FLUXERR_APER_2	E	count	RMS error vector for flux within aperture of 2 pixels
...	...	...	...
FLUXERR_APER_200	E	count	RMS error vector for flux within aperture of 200 pixels
MAG_ISO	E	mag	Isophotal magnitude
MAGERR_ISO	E	mag	RMS error for isophotal magnitude
MAG_ISOCOR	E	mag	Corrected isophotal magnitude
MAGERR_ISOCOR	E	mag	RMS error for corrected isophotal magnitude
MAG_BEST	E	mag	Best of MAG_AUTO and MAG_ISOCOR
MAGERR_BEST	E	mag	RMS error for MAG_BEST
BACKGROUND	E	count	Background at centroid position
THRESHOLD	E	count	Detection threshold above background
MU_THRESHOLD	E	arcsec^-2	Detection threshold above background
FLUX_MAX	E	count	Peak flux above background
MU_MAX	E	arcsec^-2	Peak surface brightness above background
ISOAREA_WORLD	E	deg²	Isophotal area above Analysis threshold
XMIN_IMAGE	J	pixel	Minimum x-coordinate among detected pixels
YMIN_IMAGE	J	pixel	Minimum y-coordinate among detected pixels
XMAX_IMAGE	J	pixel	Maximum x-coordinate among detected pixels
YMAX_IMAGE	J	pixel	Maximum y-coordinate among detected pixels
X_WORLD	D	deg	Baryleft position along world x axis
Y_WORLD	D	deg	Baryleft position along world y axis
XWIN_IMAGE	E	pixel	Windowed position estimate along x
YWIN_IMAGE	E	pixel	Windowed position estimate along y
X2_IMAGE	D	pixel²	Variance along x
Y2_IMAGE	D	pixel²	Variance along y
XY_IMAGE	D	pixel²	Covariance between x and y
X2_WORLD	E	deg²	Variance along X-WORLD (alpha)
Y2_WORLD	E	deg²	Variance along Y-WORLD (delta)
XY_WORLD	E	deg²	Covariance between X-WORLD and Y-WORLD
CXX_IMAGE	E	pixel^-2	Cxx object ellipse parameter
CYY_IMAGE	E	pixel^-2	Cyy object ellipse parameter
CXY_IMAGE	E	pixel^-2	Cxy object ellipse parameter
CXX_WORLD	E	deg^-2	Cxx object ellipse parameter (WORLD units)
CYY_WORLD	E	deg^-2	Cyy object ellipse parameter (WORLD units)
CXY_WORLD	E	deg^-2	Cxy object ellipse parameter (WORLD units)
A_IMAGE	D	pixel	Profile RMS along major axis
B_IMAGE	D	pixel	Profile RMS along minor axis
A_WORLD	E	deg	Profile RMS along major axis (WORLD units)
B_WORLD	E	deg	Profile RMS along minor axis (WORLD units)
THETA_WORLD	E	deg	Position angle (CCW/world-x)
THETA_J2000	E	deg	Position angle (east of north) (J2000)
ELONGATION	E	deg	A_IMAGE/B_IMAGE
ERRX2_IMAGE	E	pixel²	Variance of position along x
ERRY2_IMAGE	E	pixel²	Variance of position along y
ERRXY_IMAGE	E	pixel²	Covariance of position between x and y
ERRX2_WORLD	E	deg²	Variance of position along X-WORLD (alpha)
ERRY2_WORLD	E	deg²	Variance of position along Y-WORLD (delta)
ERRXY_WORLD	E	deg²	Covariance of position X-WORLD/Y-WORLD
ERRCXX_IMAGE	E	pixel^-2	Cxx error ellipse parameter
ERRCYY_IMAGE	E	pixel^-2	Cyy error ellipse parameter
ERRCXY_IMAGE	E	pixel^-2	Cxy error ellipse parameter
ERRCXX_WORLD	E	deg^-2	Cxx error ellipse parameter (WORLD units)
ERRCYY_WORLD	E	deg^-2	Cyy error ellipse parameter (WORLD units)
ERRCXY_WORLD	E	deg^-2	Cxy error ellipse parameter (WORLD units)
ERRA_IMAGE	E	pixel	RMS position error along major axis
ERRB_IMAGE	E	pixel	RMS position error along minor axis
ERRA_WORLD	E	deg	World RMS position error along major axis
ERRB_WORLD	E	deg	World RMS position error along minor axis
ERRTHETA_IMAGE	E	deg	Error ellipse pos. angle (CCW/x)
ERRTHETA_WORLD	E	deg	Error ellipse pos. angle (CCW/world-x)
ERRTHETA_J2000	E	deg	J2000 error ellipse pos. angle (east of north)
FWHM_WORLD	E	deg	FWHM assuming a gaussian core
ISO0	J	pixel²	Isophotal area at level 0
ISO1	J	pixel²	Isophotal area at level 1
ISO2	J	pixel²	Isophotal area at level 2
ISO3	J	pixel²	Isophotal area at level 3
ISO4	J	pixel²	Isophotal area at level 4
ISO5	J	pixel²	Isophotal area at level 5
ISO6	J	pixel²	Isophotal area at level 6
ISO7	J	pixel²	Isophotal area at level 7
SLID	K		Source list ID
SID	K		Source ID within the source list
HTM	K		Hierarchical Triangular Mesh (level 25)
FLAG	K		Not used