7/30/96	

This directory contains the HDF source catalog from
Williams et al. 1996 (AJ in press) in 3 different formats.

catalog.ps
	Postscript file of the catalog in Table 7 of the paper.

chip*.txt
	ASCII files listing the same quantities.

hdfv2catalog_*.fits
	FITS tables of the complete set of parameters for each galaxy.
 	These files can be read using the STSDAS using the STRFITS package
	and manipulated using the STSDAS TTOOLS utilities.

	The entry for each galaxy contains parameters measured from
	the summed F606W+F814W image, and the same parameters measured
	in the four separate bandpasses (F300W, F450W, F606W, and F814W).
	Note that source detection was done on the summed F606W+F814W
	image, and the galaxy centers and apertures were fixed for the
	measurements in the other bands. 

	See Williams et al. for more details. A point to note
	in comparing the raw catalog to the published version is
	that when lower limits on the F606W isophotal and total
	magnitudes are presented there, they are both computed from
	the S/N within the isophotal aperture.
	

The catalog parameters are listed below, along with the STSDAS
table specifications of datatype, print format, units, and description.

ra      d       h15.3   "hours"  "Right Ascension"
dec     d       h15.2   "degrees" "Declination"
chipno	i	i1	""	 "CCD number"
entnum	i	i5	""	 "detection number"
subent	ch*15	""	""	 "split number"
eflgs	ch*8	""	""	 "object flags"
sbr	r	f10.3	mag	 "sky brightness"
nsbr	r	f10.3	pixels	 "number of sky pixels"
ssbr	r	f10.3	counts	 "sky sigma"
area	r	f10.3	pixels	 "isophotal area"
tarea	r	f10.3	pixels	 "total area"
ispht	r	f10.3	counts	 "isophote brightness"
xavg	r	f10.3	pixels	 "average x width"
yavg	r	f10.3	pixels	 "average y width"
xc	r	f10.3	pixels	 "x position"
yc	r	f10.3	pixels	 "y position"
Li	r	f10.3	counts	 "isophotal luminosity"
sLi	r	f10.3	counts	 "sigma of isophotal luminosity"
Lc	r	f10.3	counts	 "core luminosity"
Lfca	r	f10.3	counts	 "aperture luminosity"
Ltotal	r	f10.3	counts	 "total luminosity"
icx	r	f10.3	pixels	 "x intensity weighted centroid"
icy	r	f10.3	pixels	 "y intensity weighted centroid"
ixx	r	f10.3	pixels	 "xx intensity weighted second moment"
iyy	r	f10.3	pixels	 "yy intensity weighted second moment"
ixy	r	f10.3	pixels	 "xy intensity weighted second moment"
ir1	r	f10.3	pixels	 "intensity weighted first moment radius"
ir3	r	f10.3	pixels	 "intensity weighted third moment radius"
ir4	r	f10.3	pixels	 "intensity weighted fourth moment radius"
cx	r	f10.3	pixels	 "x unweighted centroid"
cy	r	f10.3	pixels	 "y unweighted centroid"
xx	r	f10.3	pixels	 "xx unweighted second moment"
yy	r	f10.3	pixels	 "yy unweighted second moment"
xy	r	f10.3	pixels	 "xy unweighted second moment"
r1	r	f10.3	pixels	 "unweighted first moment radius"
ir2	r	f10.3	pixels	 "intensity weighted second moment radius"
r2	r	f10.3	pixels	 " unweighted second moment radius"
mc	r	f10.3	mag	 "core magnitude"
ma	r	f10.3	mag	 "aperture magnitude"
mi	r	f10.3	mag	 "isophotal magnitude"
mt	r	f10.3	mag	 "total magnitude"
s2ni	r	f10.3	""	 "S/N for isophotal mag"
s2na	r	f10.3	""	 "S/N for aperture mag"
s2nt	r	f10.3	""	 "S/N for total mag"
pa	r	f10.3	degrees	 "Raw Position Angle (vertical = 0, increases clockwise)"
celpa	r	f10.3	Degrees	 "Celestial Position Angle (increase E from N)"
eps	r	f10.3	""	 "axial ratio (isophotal b/a)"

The parameters for the individual bandpasses are identical to 
the above, with the exception that chipno, ra, and dec are not
repeated. The parameters have the filtername appended as shown
in the example below.

entnum_f300w	i	i5	""	 "detection number"
subent_f300w	ch*15	""	""	 "split number"
...