Computer-generated visual morphology catalog of ∼3,000,000 SDSS galaxies

We applied computer analysis to classify the broad morphological type of ∼ 3 · 10 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. The catalog also shows that in rare cases objects assigned by SDSS pipeline with a relatively high redshift (z>0.4) can have clear visual spiral morphology. The catalog can be downloaded at http://vfacstaff.ltu.edu/lshamir/data/morph_catalog. The image analysis software that was used to create the catalog is also publicly available. Subject headings: catalogs — techniques: image processing — methods: data analysis