Start by installing the dependencies:
To download the Kepler full frame images, run:
wget -r -nH -nd -np -R index.html -e robots=off https://archive.stsci.edu/pub/kepler/ffi/
in the $KEPCAL_DATA/ffi directory. This will take a long time and use
about 44Gb of space. Then, execute:
scripts/kepcal-index-ffis $KEPCAL_DATA
to build an index of the FFI files.
You should also download and extract the Kepler Input Catalog into the
$KEPCAL_DATA/kic directory. Then run:
scripts/kepcal-format-kic $KEPCAL_DATA
to save the KIC into a binary format that will be way faster to read.
To choose apertures, we use a rough PSF model for each channel. You compute this using a single FFI and I haven't found big differences when you use different FFIs. To estimate the PSFs, run something like:
scripts/kepcal-compute-psf $KEPCAL_DATA $KEPCAL_DATA/ffi/kplr2013038133130_ffi-cal.fits
This will save two files $KEPCAL_DATA/psf.fits and
$KEPCAL_DATA/psf.pdf. The FITS file has an estimate of the PSF for each
channel and the PDF file has a plot of these images.