Investigators using data from this site are requested to include these acknowledgments in any publications as appropriate.

The Guide Star Catalogue-II is a joint project of the Space Telescope Science Institute and the Osservatorio Astronomico di Torino. Space Telescope Science Institute is operated by the Association of Universities for Research in Astronomy, for the National Aeronautics and Space Administration under contract NAS5-26555. The participation of the Osservatorio Astronomico di Torino is supported by the Italian Council for Research in Astronomy. Additional support is provided by European Southern Observatory, Space Telescope European Coordinating Facility, the International GEMINI project and the European Space Agency Astrophysics Division.

The Guide Star Catalog-I was produced at the Space Telescope Science Institute under U.S. Government grant. These data are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope.

The Guide Star Photometry Catalog-II is produced by the Space Telescope Science Institute and the Osservatorio Astronomico di Torino. Additional funding to STScI was provided by the International GEMINI project, and to OATo by ESO/ST-ECF under contracts 56815/ECF/99/6302/NKA and 56186/ECF/99/6303/NKA, and by. These data are based on CCD observations obtained primarily at the ESO-LaSilla Observatory, the Cerro Tololo Inter-American Observatory, and the Kitt Peak National Observatory.

The Guide Star Photometry Catalog-I was produced at the Space Telescope Science Institute operated by the Association of Universities for Research in Astronomy, for the National Aeronautics and Space Administration . These data are based on photoelectric observations obtained at the University of Arizona Observatories; and at the Cerro Tololo Inter-American Observatory and the Sacramento Peak Observatory, both operated by the Association of Universities for Research in Astronomy, for the National Aeronautics and Space Administration.

The Digitized Sky Survey was produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions.

The National Geographic Society - Palomar Observatory Sky Atlas (POSS-I) was made by the California Institute of Technology with grants from the National Geographic Society.

The Second Palomar Observatory Sky Survey (POSS-II) was made by the California Institute of Technology with funds from the National Science Foundation, the National Aeronautics and Space Administration, the National Geographic Society, the Sloan Foundation, the Samuel Oschin Foundation, and the Eastman Kodak Corporation. The Oschin Schmidt Telescope is operated by the California Institute of Technology and Palomar Observatory.

The UK Schmidt Telescope was operated by the Royal Observatory Edinburgh, with funding from the UK Science and Engineering Research Council (later the UK Particle Physics and Astronomy Research Council), until 1988 June, and thereafter by the Anglo-Australian Observatory. The blue plates of the southern Sky Atlas and its Equatorial Extension (together known as the SERC-J), the near-IR plates (SERC-I), as well as the Equatorial Red (ER), and the Second Epoch [red] Survey (SES) were all taken with the UK Schmidt telescope at the AAO.