SExtractor stands for ``Source Extractor'': a software for making catalog of sources from astronomical images. Multi-Extension FITS is now supported. Binary output catalogs are also MEFs. ASCII output catalogs contain detections from all extensions merged together. Use the "EXT_NUMBER" catalog parameter to identify the extension on which a given source was detected. Check-images will also be written as MEFs if the input image is a MEF. - The (main) default config file can be dumped by typing "sex -d". Secondary configuration files like default.param are still needed, though. In case of problems, questions or suggestions related to the software, please don't hesitate to send a mail (preferably in english) to the official mailing list: sextractor@iap.fr These questions and answers to them are posted on the Web at: http://terapix.iap.fr/soft/sextractor/ In any case you can still reach me at bertin@iap.fr. I cannot garantee that I will reply immediately, but I will try for sure to provide an answer. ----------- Notes: - A version "sextractor-2.3.1_lanl" of SExtractor is available on SourceForge thanks to Mark Galassi and Dan Starr: http://sourceforge.net/projects/sextractor/ It is a reconditioned version of SExtractor 2.2.2. The LanL and the TERAPIX (present one) versions follow two different development branches. - Benne Holwerda has written a SExtractor handbook and a GUI which can be found in the doc/ subdirectory or at http://www-int.stsci.edu/~holwerda/OldHomepage/se.html Emmanuel Bertin.