image2xy - Source extractor.

Author

       The Astrometry.net team. Principal investigators are David W. Hogg (NYU) and Dustin Lang (CMU).

Description

       Read a FITS file, find objects, and write out X, Y, FLUX to fitsname.xy.fits.

Name

       image2xy - Source extractor.

Options

-eextension
              Read from a single FITS extension

       -O     Overwrite existing output file.

       -ofile
              Write XYlist to given filename.

       -Lorder
              Lanczos order

       -8     Don't use optimization for byte (u8) images.

       -H     Downsample by a factor of 2 before running simplexy.

       -dfactor
              Downsample by an integer factor before running simplexy.

       -Dfactor
              Downsample, if necessary, by this many factors of two.

       -sscale
              Set median-filter box size (default 100 pixels)

       -wwidth
              Set Gaussian PSF sigma (default 1 pixel)

       -gsigma
              Set image noise level

       -psignificance
              Set significance level of peaks in sigmas (default 8 sigmas)

       -asaddle
              Set "saddle" level joining peaks i sigmas (default 5 sigmas)

       -Pplane
              Pull out a single plane of a multi-color image (default: first plane)

       -b     Don't do (median-based) background subtraction

       -Gbackground
              Subtract this 'global' background value; implies -b-m     Set maximum extended object size for deblending (default 2000 pixels)

       -Sfile
              Save background-subtracted image to this filename (FITS float image)

       -Bfile
              Save background image to filename

       -Ufile
              Save smoothed background-subtracted image to filename

       -Mfile
              Save mask image to filename

       -Cfile
              Save connected-components image to filename

       -v     Verbose. repeat for more and more verboseness

       image2xy 'file.fits[1]'
              Process first extension.

       image2xy 'file.fits[2]'
              Process second extension

       image2xy file.fits+2
              Same as above