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| Keck II Telescope | |
|---|---|
| Name | Keck II Telescope |
| Location | Mauna_Kea |
| Altitude | 4,145 m |
| Established | 1996 |
| Owner | W. M. Keck_Observatory |
| Telescope type | reflector |
| Primary mirror | 10 m segmented |
| Mirror material | Zerodur |
Keck II Telescope is a 10-meter class optical/infrared reflecting telescope located on Mauna Kea and operated by the W. M. Keck Observatory consortium. Commissioned in 1996, it complements its twin, providing high-resolution imaging and spectroscopy used by teams from institutions such as the California Institute of Technology, University of California, University of Hawaii, and international partners including NASA and the European Southern Observatory-associated investigators. The facility has been central to programs in planetary science, stellar astrophysics, extragalactic astronomy, and observational cosmology.
Keck II forms one half of the twin Keck Observatory configuration on Mauna Kea Observatories along with Keck I, enabling coordinated operations for projects pursued by groups at the Institute for Astronomy (UH), Stanford University, University of California, Berkeley, and collaborators from the Jet Propulsion Laboratory. The primary mirror uses segmented mirror technology pioneered in projects such as the Mersenne Telescope concept and influenced later facilities like the Gran Telescopio Canarias and the Thirty Meter Telescope concept studies. Keck II has been a platform for instruments developed by teams at the University of California Observatories, Lawrence Berkeley National Laboratory, and industry partners including Ball Aerospace.
Keck II is characterized by an active suite of instruments including high-resolution spectrographs like HIRES and near-infrared integral-field units such as OSIRIS developed with collaborators from the California Institute of Technology and the University of California, Los Angeles. The telescope hosts adaptive optics systems developed with groups from Lockheed Martin, W. M. Keck Observatory engineering teams, and the University of Hawaii, enabling diffraction-limited performance that benefits programs tied to Hubble Space Telescope follow-up and complementary work with the Spitzer Space Telescope and the Chandra X-ray Observatory. Laser guide star systems implemented at Keck II were influenced by technology from the Air Force Research Laboratory and operational practices seen at Very Large Telescope sites. Instrumentation partnerships have included the National Science Foundation-funded centers, the Max Planck Institute for Astronomy collaborators, and instrumentation groups at Caltech Optical Observatories.
Keck II facilitates high-dispersion spectroscopy for exoplanet radial velocity programs connected to teams at Harvard-Smithsonian Center for Astrophysics and University of Geneva-inspired methods, transit spectroscopy aligned with European Space Agency missions, and direct imaging campaigns coordinated with the Gemini Observatory and the Subaru Telescope teams. Its capabilities support stellar population studies for projects from the Sloan Digital Sky Survey consortium and deep-field observations complementary to surveys by the Hubble Deep Field and the Cosmic Microwave Background experiments. Science programs at Keck II have engaged researchers affiliated with the Royal Society, National Aeronautics and Space Administration, Smithsonian Institution, and the Kavli Foundation.
The segmented primary mirror consists of 36 hexagonal segments made from Zerodur produced by firms that have also supplied optics for the European Southern Observatory and the Palomar Observatory upgrades. The design integrates altitude-azimuth mounting approaches used on telescopes like the Very Large Telescope and mirror support systems informed by work at the Mount Wilson Observatory. Active optics and edge sensors were developed in collaboration with engineering groups at Lawrence Livermore National Laboratory and manufacturers engaged by the W. M. Keck Observatory board consisting of representatives from institutions such as the University of California campuses and the California Institute of Technology.
Operations at Keck II are overseen by the W. M. Keck Observatory management, with observing time allocated via partner institutions including the California Institute of Technology, the University of California, and the University of Hawaii. Time allocation committees composed of astronomers from the National Science Foundation-funded community and international partners evaluate proposals often originating from groups at the Max Planck Society, NASA Goddard Space Flight Center, and the European Southern Observatory scientific staff. Technical operations involve maintenance contracts with firms experienced in telescope services used at the Subaru Telescope and the Gemini Observatory.
Work at Keck II contributed to precision radial velocity discoveries linked to teams led by researchers at the Keck Observatory and the University of California, Berkeley contributing to exoplanet catalogs used by the NASA Exoplanet Archive; direct imaging campaigns interacted with groups at the Harvard-Smithsonian Center for Astrophysics and Max Planck Institute for Astronomy. Keck II spectra advanced studies of the Galactic Center with teams including those from UCLA and the Max Planck Institute for Extraterrestrial Physics, and helped measure supermassive black hole masses in galaxies studied by researchers at Princeton University and California Institute of Technology. Cosmological redshift surveys and high-redshift galaxy confirmations were done in coordination with the Sloan Digital Sky Survey and teams from the Institute for Astronomy (Cambridge).
Keck II has undergone instrument upgrades with funding and collaboration from organizations such as the National Science Foundation, W. M. Keck Foundation, and institutional partners including the University of California Observatories. Future developments discussed among the Keck Observatory board and international partners include next-generation adaptive optics inspired by systems at the European Southern Observatory and instrument concepts comparable to those planned for the Extremely Large Telescope and the Thirty Meter Telescope projects. Partnerships with industry and academic consortia such as Caltech, UCLA, and the Max Planck Society continue to shape upgrade roadmaps.
Category:Telescopes Category:Mauna Kea