Tartu Observatory, Estonia

Groups of galaxies in the 2dF GRS :

• Catalogue of groups of galaxies in the 2dF GRS
• Clusters and groups of galaxies in the 2dF galaxy redshift survey: A new catalogue (Tago et al 2006, AN, 327, 365)

Groups of galaxies in the SDSS DR5 :

• Catalogue of groups of galaxies in the SDSS DR5 - http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/   ftp://ftp.aai.ee/pub/users/erik/sdss_dr5/
• Groups of galaxies in the SDSS Data Release 5. A group-finder and a catalogue (Tago et al 2008, Astron.Astrophys. 479, 927 /astro-ph/0706.1593/)

Groups of galaxies in the SDSS DR7:

• Groups of galaxies in the SDSS DR7. Flux- and volume-limited samples> ftp://ftp.aai.ee/pub/users/erik/sdss-DR7/
• Groups of galaxies in the SDSS Data Release 7. Flux- and volume-limited samples (Tago et al 2010)

Catalogues in preparation or unpublished

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)