sex - Man Page

extract a source catalogue from an astronomical FITS image


sex image [-c configuration-file]

[-parameter1 value1 -parameter2 value2 ...]

sex image_detect image_measure [-c configuration-file]

[-parameter1 value1 -parameter2 value2 ...]

sex -d


SExtractor is a program that builds a catalogue of objects from an astronomical image. Although it is particularly oriented towards reduction of large scale galaxy-survey data, it performs rather well on moderately crowded star fields.

See for more details.

Operation modes

-h,  --help

print this help, then exit

-V,  --version

print version number, then exit

-d,  --dump

dump a default configuration file


The full documentation for SExtractor is maintained as a PDF manual available at

Reporting Bugs

Please report bugs to the SExtractor software forum at

See Also

eye(1), missfits(1), psfex(1), scamp(1), sky(1), stiff(1), stuff(1), swarp (1), ww(1)


Written by Emmanuel Bertin (Institut d'Astrophysique de Paris)


SExtractor is licensed under the terms of the General Public License (GPL), version 3.

Referenced By

psfex(1), scamp(1), swarp(1).

January 2024 SExtractor 2.25.0