V2.17 (2008-01-07) Improved performance. Improved XSLT filter. Variable pixel-scale flux correction is now supported. Both GAIN and SATLEVEL keywords are now propagated. Many bugfixes. V2.16 (2006-08-09) XML-VOTable meta-data output added. Many bugfixes. Updated documentation V2.15.7 (2006-03-12) Single weight bug fixed. Weighting all images with one single weight is now allowed. Very long arguments to the swarp command are now supported. V2.15.5 (2005-07-20) Mostly bugfixes. V2.0 (2003-08-18) Image combination section completely rewritten, with support for multithreading and multidimensional data. It is now 2-4 times faster. Image resampling optimized: about twice faster now. Various portability issues fixed. Documentation updated. V1.41 (2003-04-21) New COPY_KEYWORDS option to propagate selected FITS keywords New CELESTIAL_TYPE PIXEL to boost processing speed when astronometry is not a concern. Many bugfixes. Update doc. V1.40 (2003-04-17) Fixed Multithreaded code (now with load-balancing). V1.38 (2002-11-28) Bugfixes V1.37 (2002-10-08) Bugfixes. Longitude axis is now reversed by default. V1.36 (2002-06-15) Support for large files. Bugfixes V1.35 (2002-06-11) Bugfixes V1.34 (2002-05-09) First "GNU-style" release. V1.27 (2002-03=17) Multi-threading and resample/coadd-only options added V1.18 (2001-03-11) Public release with full documentation V1.14 (2001-01-14) Support for galactic and equatorial coordinates V1.6 (2000-08-21) Public pre-release. Interpolation engine rewritten V1.5 (2000-07-??) Support for IRAF's TNX astrometric format added V1.4 (2000-05-??) First working version.