DATA RELEASE - README File



Release of all data taken with WFPC2 (F300W) in parallel with the 
GOODS fields (HDF-N and CDF-S) before May 2003.
 
IRAF (Pyraf) task Multidrizzle was used to combine the WFPC2 images 
within the same area of the sky 
[name convention = field-epoch-file#_drz.fits]

The individual files used in each multidrizzle are listed in the 
README [field-epoch-README] files for each field/epoch. 
The individual files should be obtained from the STScI archive.  


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                               CATALOGS

All WFPC2 catalogs were matched with the ACS catalogs [field-epoch.tab]. 
WFPC2 catalogs before the match are in directory /oldcats.

WFPC2 Catalogs were generated with SExtractor v2.2.2 and have mag_auto brighter 
than 24.5: [field-epoch-file#-lim.cat]

Masks were created to avoid borders: [field-epoch-mask]

SExtractor input parameters used to generate catalogs:

# Default configuration file for SExtractor V1.2b14 - > 2.0
# EB 23/07/98
# (*) indicates parameters which can be omitted from this config file.

#-------------------------------- Catalog ------------------------------------

CATALOG_NAME	filedepoch#.cat	# name of the output catalog
CATALOG_TYPE	ASCII_HEAD	# "NONE","ASCII_HEAD","ASCII","FITS_1.0"
				# or "FITS_LDAC"

PARAMETERS_NAME	/home/duilia/sextractor2.2.2/config/default.param	# name of the file containing catalog contents

#------------------------------- Extraction ----------------------------------

DETECT_TYPE	CCD		# "CCD" or "PHOTO" (*)
FLAG_IMAGE	flag.fits	# filename for an input FLAG-image
DETECT_MINAREA	5		# minimum number of pixels above threshold
DETECT_THRESH	2.5		# <sigmas> or <threshold>,<ZP> in mag.arcsec-2
ANALYSIS_THRESH	1.5		# <sigmas> or <threshold>,<ZP> in mag.arcsec-2

FILTER		Y		# apply filter for detection ("Y" or "N")?
FILTER_NAME	/home/duilia/sextractor2.2.2/config/gauss_4.0_7x7.conv # name of the file containing the filter

DEBLEND_NTHRESH	32		# Number of deblending sub-thresholds
DEBLEND_MINCONT	0.1		# Minimum contrast parameter for deblending

CLEAN		Y		# Clean spurious detections? (Y or N)?
CLEAN_PARAM	1.0		# Cleaning efficiency

MASK_TYPE	CORRECT		# type of detection MASKing: can be one of
				# "NONE", "BLANK" or "CORRECT"

#------------------------------ Photometry -----------------------------------

PHOT_APERTURES	20		# MAG_APER aperture diameter(s) in pixels
PHOT_AUTOPARAMS	2.5, 3.5	# MAG_AUTO parameters: <Kron_fact>,<min_radius>

SATUR_LEVEL	50000.0		# level (in ADUs) at which arises saturation

MAG_ZEROPOINT	20.77		# magnitude zero-point
MAG_GAMMA	4.0		# gamma of emulsion (for photographic scans)
GAIN		53340		# detector gain in e-/ADU.
PIXEL_SCALE	1.0		# size of pixel in arcsec (0=use FITS WCS info).

#------------------------- Star/Galaxy Separation ----------------------------

SEEING_FWHM	1.2		# stellar FWHM in arcsec
STARNNW_NAME	/home/duilia/sextractor2.2.2/config/default.nnw	# Neural-Network_Weight table filename

#------------------------------ Background -----------------------------------

BACK_SIZE	64		# Background mesh: <size> or <width>,<height>
BACK_FILTERSIZE	3		# Background filter: <size> or <width>,<height>

BACKPHOTO_TYPE	LOCAL		# can be "GLOBAL" or "LOCAL" (*)
BACKPHOTO_THICK	24		# thickness of the background LOCAL annulus (*)

#------------------------------ Check Image ----------------------------------

CHECKIMAGE_TYPE	NONE		# can be one of "NONE", "BACKGROUND",
				# "MINIBACKGROUND", "-BACKGROUND", "OBJECTS",
				# "-OBJECTS", "SEGMENTATION", "APERTURES",
				# or "FILTERED" (*)
CHECKIMAGE_NAME	check.fits	# Filename for the check-image (*)

#--------------------- Memory (change with caution!) -------------------------

MEMORY_OBJSTACK	2000		# number of objects in stack
MEMORY_PIXSTACK	100000		# number of pixels in stack
MEMORY_BUFSIZE	1024		# number of lines in buffer

#----------------------------- Miscellaneous ---------------------------------

VERBOSE_TYPE	NORMAL		# can be "QUIET", "NORMAL" or "FULL" (*)

#------------------------------- New Stuff -----------------------------------