Tartu Observatory

Groups of galaxies in the SDSS DR4 :

• A catalogue of SDSS DR4 groups

A Catalogue of Redshifts and Velocity Dispersions for ACO Clusters of Galaxies :

• Andernach, H., Tago, E. 2008. A Compilation of Redshifts and Velocity Dispersions for ACO Clusters of Galaxies (ZACO), (in preparation)

Groups of galaxies in the SDSS DR6 :

• A Volume-limited Catalogue of Groups of Galaxies in the SDSS Data Release 6.I. A search method and a catalogue (in preparation)
• A Volume-limited Catalogue of Groups of Galaxies in the SDSS Data Release 6. II. Comparison with simulations (in preparation)