README

This directory contains several ASCII files related to SExtractor
configuration:

default.sex:	an example of SExtractor .sex configuration file.
default.param:	a .param file, containing all parameters known by SExtractor.
		To prevent some parameters to figure in the output catalog,
		just erase or comment their names (by adding a # at the
		beginning of the line).
default.nnw:	a "Neural-Network-Weights" file for star/galaxy separation on
		images with Moffat-like PSFs.
*.conv:		several "classical" convolution masks for optimal detection:
		- default.conv		a small pyramidal function (fast),
		- gauss*.conv		a set of gaussian functions, for
					seeing FWHMs between 1.5 and 5 pixels
					(best for faint object detection),
		- tophat*.conv		a set of "top-hat" functions. Use them
					to detect extended, low-surface
					brightness objects, with a very low
					THRESHOLD.
		- mexhat*.conv		"wavelets", producing a passband-
					filtering of the image, tuned to
					seeing FWHMs between 1.5 and 5 pixels.
					Useful in very crowded star fields,
					or in the vicinity of a nebula.
					WARNING: may need a high THRESHOLD!!
		- block_3x3.conv	a small "block" function (for rebinned
					images like those of the DeNIS survey).

		All these convolution files are normalized by default.