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Magdalena Ridge Observatory Interferometer


Magdalena Ridge Observatory Interferometer

Magdalena Ridge Observatory 2.4-meter Telescope
2.4-meter Telescope at Magdalena Ridge
Organization New Mexico Tech
Code H01  
Location Socorro, New Mexico
Altitude 3,230 meters (10,600 ft)
Established 1999 (1999)
MRO fast-tracking Telescope 2.4 m reflector
MRO Optical Interferometer 10 element array

Magdalena Ridge Observatory (MRO) is an astronomical observatory in Socorro County, New Mexico, about 32 kilometers (20 mi) west of the town of Socorro. The observatory is located in the Magdalena Mountains near the summit of South Baldy Mountain, adjacent to the Langmuir Laboratory for Atmospheric Research. Currently operational at the site (since 2008) is a 2.4-meter fast-tracking optical telescope.;[1] under construction is a ten-element optical interferometer.

The MRO Interferometer is an international scientific collaboration between New Mexico Institute of Mining and Technology (New Mexico Tech – NMT) and the Cavendish Astrophysics Group of University of Cambridge. The project is principally funded by the United States Naval Research Laboratory (NRL), which also supports the Navy Optical Interferometer near Flagstaff, Arizona. NRL is part of the Office of Naval Research.[2] New Mexico State University, New Mexico Highlands University, the University of Puerto Rico, and Los Alamos National Laboratory were originally partners, but have since withdrawn.[3]


2.4-meter Telescope

The MRO 2.4-meter Telescope is a Nasmyth design on an azimuth-elevation (az-el) mount. The 2.4-meter is capable of slew rates of 10 degrees per second, enabling it to observe artificial objects in low Earth orbit. The telescope is also be used for asteroid studies and observations of other solar system objects.[4] The MRO 2.4-meter achieved first light on October 31, 2006, and began regular operations on September 1, 2008 after a commissioning phase that included tracking near-Earth asteroid 2007 WD5 for NASA.[5]

The telescope's primary mirror has a complicated history. It was built by Itek as part of a competition for the contract for the Hubble mirror (although it has a different prescription than the one used to construct the Hubble). When Perkin-Elmer was chosen instead as the Hubble contractor, the mirror was passed to a classified Air Force project. When this project was in turn discontinued, the mirror was transferred to MRO, along with a blank for the secondary.[6][7]

As of May 2008, the facility is under a multi-year contract with NASA to provide follow-up astrometry and characterization data on near-Earth asteroids and comets as part of Spaceguard, and also collaborates with the Air Force to track and characterize satellites in GEO and LEO orbits.[8] On October 9, 2009, New Mexico Tech scientists used instruments on the MRO 2.4-meter and at the Etscorn Campus Observatory to observe controlled impacts of two NASA Centaur rockets at the southern polar region of the moon as part of the LCROSS Project.[9][10]

Magdalena Ridge Optical Interferometer

The Magdalena Ridge Optical Interferometer (MROI) is an optical and near infrared interferometer under construction at MRO. When the MROI is completed, it will have ten 1.4 m (55 in) telescopes located on three 340 m (1,120 ft) arms. Each arm will have nine stations where the telescopes can be positioned, and one telescope can be positioned at the center. The telescopes and their enclosures will be moved with a customized crane. Light from the telescopes' primary mirrors will be directed along the arms to the Beam Combining Facility (BCF). These pipes will be evacuated of all air in order to reduce distortions. Inside the BCF, the light will first travel through extensions of the pipes in the Delay Line Area, which will bring the light beams into phase. Then light will exit the vacuum pipes in the Beam Combining Area (BCA), where the light will be directed into one of three permanent sensors, or to a temporary instrument on a fourth table. The light will strike a total of eleven mirrors before entering a sensor.

The MROI was designed with three research areas in mind: star and planet formation, stellar accretion and mass loss, and active galactic nuclei.[11] An interferometer was selected because such devices can be built with higher resolving power than single-mirror telescopes, enabling them to image distant objects in greater detail. However, they do not provide more light-gathering capacity, as the total area of the mirrors is usually small.

MROI Construction Status

The basic design of MROI was completed in 2006. Construction of the facility began in August 2006 with the BCF building, which was completed 2008. In July 2007, the contract for the design of the ten 1.4  telescopes was awarded to Advanced Mechanical and Optical Systems S.A. (AMOS) of Belgium. In 2009 the design of the infrastructure of interferometer arms was completed, as was the design for the telescope enclosures. In 2010 construction of the arms began. Also in 2010 the first delay line was installed in the BCF.[12]

NMT anticipates that the first light from the telescopes will be combined in 2013.[13]

See also


External links

  • Department of Physics at New Mexico Tech
  • Cambridge University website
  • Magdalena Ridge Observatory Clear Sky Clock Forecasts of observing conditions.
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