Public bug reported: Observed using the binary sextractor package on Ubuntu hardy i386:
some columns in the object catalog end up containing only zeros, an incorrect result for the input data supplied. To reproduce, take a FITS file and run it through sextractor. The problem can be reproduced using the options suggested in the man page: sextractor file.fits -c /usr/share/sextractor/default.sex -PARAMETERS_NAME /usr/share/sextractor/default.param -FILTER N and look at the values for X_IMAGE and Y_IMAGE in the output file (test.cat). Another parameter affected is ELLIPTICITY. Using a suitably modified .param file: # 1 X_IMAGE Object position along x [pixel] # 2 Y_IMAGE Object position along y [pixel] # 3 ELLIPTICITY 1 - B_IMAGE/A_IMAGE # 4 A_IMAGE Profile RMS along major axis [pixel] # 5 B_IMAGE Profile RMS along minor axis [pixel] # 6 THETA_IMAGE Position angle (CCW/x) [deg] # 7 XMIN_IMAGE Minimum x-coordinate among detected pixels [pixel] # 8 XMAX_IMAGE Maximum x-coordinate among detected pixels [pixel] 0.000 0.000 0.000 0.912 0.674 -33.2 729 732 0.000 0.000 0.000 0.729 0.436 -71.6 608 609 0.000 0.000 0.000 0.775 0.711 35.7 812 814 [ ... and so on ] Clearly something is wrong: 1 - 0.674/0.912 is rather different from zero. I was able to fix the problem simply by rebuilding the sextractor package, *without any changes to the source*, with current hardy compilers and build tools (I used pbuilder). My guess is that the i386 deb that is currently in the Ubuntu archive for hardy was miscompiled. ** Affects: sextractor (Ubuntu) Importance: Undecided Status: New -- X_IMAGE, Y_IMAGE, ELLIPTICITY are always zero https://bugs.launchpad.net/bugs/283142 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs