Palomar Testbed Interferometer

Target entity: Palomar Testbed Interferometer
Context triple: [Palomar Observatory, hasTelescope, Palomar Testbed Interferometer]

• A. Narrabri Stellar Intensity Interferometer
  The Narrabri Stellar Intensity Interferometer was a pioneering astronomical instrument in Australia that used intensity interferometry to measure the angular diameters of hot stars with unprecedented precision.
• B. 20 Meter Telescope
  The 20 Meter Telescope is a mid-sized radio telescope at the Green Bank Observatory used for astronomical research and education in radio astronomy.
• C. Navy Precision Optical Interferometer (partnership)
  The Navy Precision Optical Interferometer is a high-resolution astronomical observatory operated as a partnership between Lowell Observatory, the U.S. Naval Observatory, and the U.S. Naval Research Laboratory to conduct precise optical interferometry of stars and other celestial objects.
• D. 43 Meter Telescope
  The 43 Meter Telescope is a mid-sized radio telescope at the Green Bank Observatory in West Virginia used for astronomical and atmospheric research.
• E. SMARTS 1.0m Telescope
  The SMARTS 1.0m Telescope is a one-meter-class optical telescope operated as part of the SMARTS consortium’s observing facilities at the Cerro Tololo Inter-American Observatory in Chile.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Palomar Testbed Interferometer
Target entity description: The Palomar Testbed Interferometer is an astronomical interferometer designed to combine light from multiple small telescopes to achieve extremely high angular resolution for precision measurements of stars and other celestial objects.

• A. Narrabri Stellar Intensity Interferometer
  The Narrabri Stellar Intensity Interferometer was a pioneering astronomical instrument in Australia that used intensity interferometry to measure the angular diameters of hot stars with unprecedented precision.
• B. 20 Meter Telescope
  The 20 Meter Telescope is a mid-sized radio telescope at the Green Bank Observatory used for astronomical research and education in radio astronomy.
• C. Navy Precision Optical Interferometer (partnership)
  The Navy Precision Optical Interferometer is a high-resolution astronomical observatory operated as a partnership between Lowell Observatory, the U.S. Naval Observatory, and the U.S. Naval Research Laboratory to conduct precise optical interferometry of stars and other celestial objects.
• D. 43 Meter Telescope
  The 43 Meter Telescope is a mid-sized radio telescope at the Green Bank Observatory in West Virginia used for astronomical and atmospheric research.
• E. SMARTS 1.0m Telescope
  The SMARTS 1.0m Telescope is a one-meter-class optical telescope operated as part of the SMARTS consortium’s observing facilities at the Cerro Tololo Inter-American Observatory in Chile.
• F. None of above. chosen