# This describes the currently available catalog definition entries
# available and the format.

# Comments begining with '#' are ignored.
# Order of lines determines order in catalog.
# Case is ignored though labels in catalog will be as given in file.

ACE_NAME		[OPTIONAL USER NAME FOR CATALOG]

# There are a few functions currently available.

MAG(ACE_NAME)
APFLUX(radius_in_pixels)
MAG(APFLUX(radius_in_pixels))


# Basic quantities.
NUM		Object number
PNUM		Parent number (0 if original detection)
NPIX		Number of pixels
NDETECT		Number of detected pixels (before growing)
FLAGS		Flags (currently on M for multiple object)

# Fluxes
FLUX		Isophotal flux
FRACFLUX	Apportioned flux (TOTMAG)
APFLUX(radius)	Aperture fluxes (radius in pixels)
SKY		Mean sky
PEAK		Peak pixel value above sky
ISIGAVG		Average (I - sky) / sig
ISIGMAX		Maximum (I - sky) / sig

# Positions
WX		X world coordinate (requires WCS in header)
WY		Y world coordinate (requires WCS in header)
X1		X centroid (pixels)
Y1		Y centroid (pixels)
XAP		X aperture coordinate (centroid initially then not changed)
YAP		Y aperture coordinate (centroid initially then not changed)
XMIN		Minimum X (pixels)
XMAX		Maxium X (pixels)
YMIN		Minimum Y (pixels)
YMAX		Maxium Y (pixels)

# Miscellaneous
SIG		Mean sky sigma
FRAC		Apportioned fraction

X2		X 2nd moment (pixels)
Y2		Y 2nd moment (pixels)
XY		X 2nd cross moment (pixels)

# Derived quantities.
A		Semimajor axis
B		Semiminor axis
THETA		Position angle (degrees)
ELONG		Elongation = A/B
ELLIP		Ellipticity = 1 - B/A
R		Second moment radius (pixels)
CXX		Second moment ellipse (pixels)
CYY		Second moment ellipse (pixels)
CXY		Second moment ellipse (pixels)

# Error estimates.
FLUXERR		Error in flux
XERR		Error in X centroid (pixels)
YERR		Error in Y centroid (pixels)
AERR		Error in A
BERR		Error in B
THETAERR	Error in THETA (degrees)
CXXERR		Error in CXX (pixels)
CYYERR		Error in CYY (pixels)
CXYERR		Error in CXY (pixels)