| Final SExtractor parameter list of the T0004 and T0003 CFHTLS-Deep/WIDE catalogs |
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by
YME
YME
- Updated September 25th, 2008
SExtractor parameter list for T0004 and T0003
| Parameter |
Unit |
Parameter Description |
Comment |
| NUMBER |
|
Running object number |
|
| X_IMAGE |
pixel |
Object position along x |
|
| Y_IMAGE |
pixel |
Object position along y |
|
| ERRA_IMAGE |
pixel |
RMS position error along major axis |
Error-ellipse shape parameter.
Generic SExtractor parameter naming construction: ERR[-] refers to error-ellipse properties, while [-]ERR refers to error on SExtractor object parameters. |
| ERRB_IMAGE |
pixel |
RMS position error along minor axis |
Error-ellipse shape parameter. |
| ERRTHETA_IMAGE |
deg |
Error-ellipse position angle (CCW/x) |
Error-ellipse shape parameter. |
| A_IMAGE |
pixel |
Profile RMS along major axis |
Object shape parameter. |
| B_IMAGE |
pixel |
Profile RMS along minor axis |
Object shape parameter. |
| POLAR_IMAGE |
- |
Ellipticity "polarisation" definition. |
Object shape parameter: (A2-B2) / (A2+B2), useful for weak lensing. |
| THETA_IMAGE |
deg |
Position angle (CCW/x) |
Object shape parameter. |
| X_WORLD |
deg |
Barycenter position along world x axis |
|
| Y_WORLD |
deg |
Barycenter position along world y axis |
|
| ERRA_WORLD |
pixel |
World RMS position error along major axis |
Error-ellipse shape parameter. |
| ERRB_WORLD |
pixel |
World RMS position error along minor axis |
Error-ellipse shape parameter. |
| ERRTHETA_WORLD |
deg |
Error ellipse pos. angle (CCW/world-x) |
Error-ellipse position angle. |
| A_WORLD |
deg |
Profile RMS along major axis (world units) |
|
| B_WORLD |
deg |
Profile RMS along minor axis (world units) |
|
| POLAR_WORLD |
- |
Ellipticity "polarisation" (from world units A, B) |
|
| THETA_WORLD |
deg |
Position angle (CCW/world-x) |
|
| ALPHA_J2000 |
deg |
Right ascension of barycenter (J2000) |
|
| DELTA_J2000 |
deg |
Declination of barycenter (J2000) |
|
| ERRTHETA_J2000 |
deg |
J2000 error ellipse pos. angle (east of north) |
|
| THETA_J2000 |
deg |
Position angle (east of north) (J2000) |
|
| XWIN_IMAGE |
pixel |
Windowed position estimate along x |
WIN[--] refers to parameters weighted by a Gaussian window function, as in IMCAT. |
| YWIN_IMAGE |
pixel |
Windowed position estimate along y |
|
| ERRAWIN_IMAGE |
pixel |
RMS windowed pos error along major axis |
|
| ERRBWIN_IMAGE |
pixel |
RMS windowed pos error along minor axis |
|
| ERRTHETAWIN_IMAGE |
deg |
Windowed error ellipse pos angle (CCW/x) |
|
| AWIN_IMAGE |
pixel |
Windowed profile RMS along major axis |
|
| BWIN_IMAGE |
pixel |
Windowed profile RMS along minor axis |
|
| POLARWIN_IMAGE |
- |
Ellipticity "polarisation" |
|
| THETAWIN_IMAGE |
deg |
Windowed position angle (CCW/x) |
|
| XWIN_WORLD |
deg |
Windowed position along world x axis |
|
| YWIN_WORLD |
deg |
Windowed position along world y axis |
|
| ERRAWIN_WORLD |
pixel |
World RMS windowed pos error along major axis |
|
| ERRBWIN_WORLD |
pixel |
World RMS windowed pos error along minor axis |
|
| ERRTHETAWIN_WORLD |
deg |
Windowed error ellipse pos. angle (CCW/world-x) |
|
| AWIN_WORLD |
deg |
Windowed profile RMS along major axis (world units) |
|
| BWIN_WORLD |
deg |
Windowed profile RMS along minor axis (world units) |
|
| POLARWIN_WORLD |
- |
Ellipticity "polarisation" (from world units AWIN, BWIN) |
|
| THETAWIN_WORLD |
deg |
Windowed position angle (CCW/world-x) |
|
| ALPHAWIN_J2000 |
deg |
Windowed right ascension (J2000) |
|
| DELTAWIN_J2000 |
deg |
windowed declination (J2000) |
|
| ERRTHETAWIN_J2000 |
deg |
J2000 windowed error ellipse pos. angle (east of north) |
|
| THETAWIN_J2000 |
deg |
Windowed position angle (east of north) (J2000) |
|
| FLUX_ISO |
count |
Isophotal flux |
|
| FLUXERR_ISO |
count |
RMS error for isophotal flux |
|
| MAG_ISO |
mag |
Isophotal magnitude |
|
| MAGERR_ISO |
mag |
RMS error for isophotal magnitude |
|
| FLUX_APER(2) |
count |
Flux vector within fixed circular aperture(s) |
For CFHTLS/Megacam, apertures are 16 pixels (3") and 25 pixels (4.7") diameter |
| FLUXERR_APER(2) |
count |
RMS error vector for aperture flux(es) |
|
| MAG_APER(2) |
mag |
Fixed aperture magnitude vector |
Given for apertures defined by FLUX_APER |
| MAGERR_APER(2) |
mag |
RMS error vector for fixed aperture mag. |
|
| FLUX_AUTO |
count |
Flux within a Kron-like elliptical aperture |
|
| FLUXERR_AUTO |
count |
RMS error for AUTO flux |
|
| MAG_AUTO |
mag |
Kron-like elliptical aperture magnitude |
|
| MAGERR_AUTO |
mag |
RMS error for AUTO magnitude |
|
| FLUX_PETRO |
count |
Flux within a Petrosian-like elliptical aperture |
|
| FLUXERR_PETRO |
count |
RMS error for PETROsian flux |
|
| MAG_PETRO |
mag |
Petrosian-like elliptical aperture magnitude |
|
| MAGERR_PETRO |
mag |
RMS error for PETROsian magnitude |
|
| FLUX_RADIUS(3) |
pixel |
Fraction-of-light radii |
For T0004 and T0003 : Radii that contain 20%. 50% and 80% of the total flux. |
| KRON_RADIUS |
|
Kron apertures in units of A or B |
|
| PETRO_RADIUS |
|
Petrosian apertures in units of A or B |
|
| BACKGROUND |
count |
Background at centroid position |
|
| THRESHOLD |
count |
Detection threshold above background |
|
| MU_THRESHOLD |
mag*arcsec-2 |
Detection threshold above background |
|
| FLUX_MAX |
count |
Peak flux above background |
|
| MU_MAX |
mag*arcsec-2 |
Peak surface brightness above background |
|
| ISOAREA_IMAGE |
pixel2 |
Isophotal area above Analysis threshold |
|
| ISOAREAF_IMAGE |
pixel2 |
Isophotal area (filtered) above Detection threshold |
|
| ISOAREA_WORLD |
deg2 |
Isophotal area above Analysis threshold |
|
| ISOAREAF_WORLD |
deg2 |
Isophotal area (filtered) above Detection threshold |
|
| FLAGS |
|
Extraction flags |
|
| CLASS_STAR |
|
S/G classifier output |
|
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