| Johnson, Kelsey | The properties of super star clusters in a sample of starburst galaxies | 2001 | University of Colorado at Boulder | OSCIR | USA |
| Stephens, Andrew W. | Stellar populations of nearby galaxies | 2001 | The Ohio State University | Hokupaa | USA |
| Cypriano, Eduardo Serra | Lentes Gravitacionais em Aglomerados de Galaxias | 2002 | University of Sao Paulo | GMOS-N | Brazil |
| Lloyd, James Patrick | The detection and characterization of low mass companions to sun-like stars | 2002 | University of California, Berkeley | Hokupaa | USA |
| Roe, Henry G. | Titan's atmosphere at high-resolution | 2002 | University of California, Berkeley | Hokupaa | USA |
| Courtney, Nathan James | X-ray luminous clusters of galaxies at z>0.3 | 2003 | Durham University | GMOS-N | UK |
| Flicker, Ralf | Methods of multi-conjugate adaptive optics for astronomy | 2003 | Lunds Universitet | Hokupaa | Other |
| Potter, Daniel E. | A search for debris disks with a dual channel adaptive optics imaging polarimeter | 2003 | University of Hawaii | Hokupaa | USA |
| Radomski, James Thomas | High-resolution mid-infrared imaging of active galactic nuclei | 2003 | University of Florida | OSCIR | USA |
| Abbott, Jay Brian | Quantitative spectroscopic studies of Wolf-Rayet stars in local group galaxies | 2004 | University of London, University College London | GMOS-N | UK |
| Barbosa, Cassio | The environment of massive star birth sites | 2004 | University of Sao Paulo | TRECS | Brazil |
| Kalirai, Jasonjot | Astrophysics with white dwarfs | 2004 | University of British Columbia | GMOS-N | Canada |
| Schaefer, Gail Helen | Dynamical masses of pre-main sequence stars | 2004 | State University of New York at Stony Brook | NIRI+ALTAIR | USA |
| Sheppard, Scott S. | Small bodies in the outer solar system: from Kuiper Belt objects to Centaurs to satellites | 2004 | University of Hawaii | GMOS-N | USA |
| Tanner, Angelle Maria | Extended sources in the central parsec of the Galactic Center | 2004 | University of California, Los Angeles | Hokupaa | USA |
| Wayth, Randall B. | The structure of galaxies and AGN using gravitational lensing | 2004 | University of Melbourne | GMOS-N | Australia |
| Marois, Christian | La recherche de naines brunes et d'exoplanetes: Developpement d'une technique d'imagerie multibande | 2004 | Universite de Montreal | NIRI | Canada |
| Bolton, Adam S. | Constraints on early-type galaxy structure from sepctroscopically selected gravitaitonal lenses | 2005 | Massachusetts Institute of Technology | GMOS-N | USA |
| Bonanos, Alceste Zoe | Determining accurate distances to nearby galaxies | 2005 | Harvard University | GMOS-N | USA |
| Dahm, Scott E. | The evolution of young clusters | 2005 | University of Hawaii | GMOS-N | USA |
