How to use SExtractor.md

1. Generate a list of measurement configuration parameters. Set the values.

sex -d > somename.sex

Or full list

sex -dd > somename.sex

2. Generate a list of output items.

sex -dp > somename.param

Choose items we need and comment out others with '#'. Or just generate a new file with items we need, e.g.

NUMBER                                                                                                                         
X_IMAGE
Y_IMAGE
X2_IMAGE
Y2_IMAGE
XY_IMAGE
FLUX_BEST
MAG_BEST
FLUX_RADIUS
FLAGS

3. To save output catalog as LDAC, modify somename.sex

CATALOG_TYPE     FITS_LDAC

4. Measure image.fits

sex -c somename.sex image.fits

5. The default output catalog is "test.cat"