Computer-generated visual morphology catalog of ~3,000,000 SDSS galaxies
  We applied computer analysis to classify the broad morphological type of
~3,000,000 SDSS galaxies. The catalog provides for each galaxy the DR8 object
ID, right ascension, declination, and the certainty of the automatic
classification to spiral or elliptical. The certainty of the classification
allows controlling the accuracy of a subset of galaxies by sacrificing some of
the least certain classifications. The accuracy of the catalog was tested using
galaxies that were classified by the manually annotated Galaxy Zoo catalog. The
results show that the catalog contains ~900,000 spiral galaxies and ~600,000
elliptical galaxies with classification certainty that has a statistical
agreement rate of ~98% with Galaxy Zoo debiased 'superclean' dataset. That also
demonstrates the ability of computers to turn large datasets of galaxy images
into structured catalogs of galaxy morphology. The catalog can be downloaded at
http://vfacstaff.ltu.edu/lshamir/data/morph_catalog , and can be accessed
through public tables on CAS: public.broadMorph.LargeGM,
public.broadMorph.LargeWnnGM, and public.broadMorph.SpectraGM. The image
analysis software that was used to create the catalog is also publicly
available.
