build-astrometry-index - Create astrometry.net index files

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

build-astrometry-index  takes a FITS catalog table containing at least RA,DEC, and magnitude columns and
       converts it into an index file that can be used by the astrometry.net programs like solve-index (1).

       build-astrometry-index - Create astrometry.net index files

-icatalog
              Input FITS catalog: source RA,DEC, etc.

       -eextension
              FITS extension to read when -i is specified.

       -1index
              Share another index's stars (alternatively to -i/-e).

       -ofile
              Output filename for index

       -Nnside
              Healpix Nside for quad-building

       -lsize
              Minimum quad size (arcminutes)

       -usize
              Maximum quad size (arcminutes)

       -Pnumber
              Use 'preset' values for -N, -l, and -u. The scale-number is the last two digits of the  pre-cooked
              index filename -- eg., index-205 is -P5.

              -P0 should be good for images about 6 arcmin in size and it goes in steps of sqrt(2), so:

              -P2 should work for images about 12 arcmin across

              -P4 should work for images about 24 arcmin across

              -P6 should work for images about 1 degree across

              -P8 should work for images about 2 degree across

              -P10 should work for images about 4 degree across etc... up to -P19-Scolumn
              Sort column (default: assume the input file is already sorted)

       -f     Sort in descending order (eg, for FLUX); default ascending (eg, for MAG)

       -Acolumn
              Specify the RA  column name in the input FITS table (default "RA")

       -Dcolumn
              Specify the Dec column name in the input FITS table (default "Dec")

       -Bval Cut any object whose sort-column value is less than val; for mags this is a bright limit

       -U     Healpix Nside for uniformization (default: same as -n)

       -Hbighealpix
              Big healpix; default is all-sky

       -sNside
              Big healpix Nside; default is 1

       -mmargin
              Add a margin of margin healpixels; default 0

       -nsweeps
              Sweeps (ie, number of stars per fine healpix grid cell); default 10

       -rradius
              Deduplication radius in arcseconds; default no deduplication

       -jjitter
              Positional error of stars in the reference catalog (in arcsec; default 1)

       -ddimquads
              Number of stars in a "quad" (default 4).

       -ppasses
              Number of rounds of quad-building (ie, number of quads per healpix cell, default 16)

       -Rreuse
              Number of times a star can be used (default: 8)

       -Lmax-reuses
              Make  extra  passes  through  the  healpixes,  increasing the -r reuse limit each time, up to max-reuses.

       -E     Scan through the catalog, checking which healpixes are occupied.

       -Iid  Set the unique ID of this index

       -M     In-memory (don't use temp files)

       -T     Don't delete temp files

       -tdir Use this temp directory (default: /tmp)

       -v     Add verbosity.

       hpsplit (1), solve-field (1)
       For a tutorial, see http://astrometry.net/doc/build-index.html

0.56                                                July 2015                          BUILD-ASTROMETRY-INDEX(1)

build-astrometry-index [options] -icatalog-ofile-Pscale