J.D. Harrington
Headquarters, Washington
202-358-5241
j.d.harrington@nasa.gov
Whitney Clavin
Jet Propulsion Laboratory, Pasadena,
Calif.
818-354-4673
whitney.clavin@jpl.nasa.gov
WASHINGTON -- NASA's Nuclear
Spectroscopic Telescope Array, or NuSTAR, is being prepared for the final
journey to its launch pad on Kwajalein Atoll in the central Pacific Ocean. The
mission will study everything from massive black holes to our own sun. It is
scheduled to launch no earlier than June 13.
"We will see the hottest, densest
and most energetic objects with a fundamentally new high-energy X-ray telescope
that can obtain much deeper and crisper images than before," said Fiona
Harrison, the NuSTAR principal investigator at the California Institute of Technology
(Caltech) in Pasadena, Calif., who first conceived of the mission 20 years ago.
The observatory is perched atop an
Orbital Sciences Corporation Pegasus XL rocket. If the mission passes its
Flight Readiness Review on June 1, the rocket will be strapped to the bottom of
an aircraft, the L-1011 Stargazer, also operated by Orbital, on June 2. The
Stargazer is scheduled to fly from Vandenberg Air Force Base in central
California to Kwajalein June 5-6.
On launch day, the Stargazer will take
off and at around 11:30 a.m. EDT (8:30 a.m. PDT) will drop the rocket, which
will then ignite and carry NuSTAR to a low orbit around Earth.
"NuSTAR uses several innovations
for its unprecedented imaging capability and was made possible by many
partners," said Yunjin Kim, the project manager for the mission at NASA's
Jet Propulsion Laboratory (JPL) in Pasadena, Calif. "We're all really
excited to see the fruition of our work begin its mission in space."
NuSTAR will be the first space telescope
to create focused images of cosmic X-rays with the highest energies. These are
the same types of X-rays that doctors use to see your bones and airports use to
scan your bags. The telescope will have more than 10 times the resolution, and
more than 100 times the sensitivity, of its predecessors while operating in a
similar energy range.
The mission will work with other
telescopes in space now, including NASA's Chandra X-ray Observatory, which
observes lower-energy X-rays. Together, they will provide a more complete
picture of the most energetic and exotic objects in space, such as black holes,
dead stars and jets traveling near the speed of light.
"NuSTAR truly demonstrates the
value that NASA's research and development programs provide in advancing the
nation's science agenda," said Paul Hertz, NASA's Astrophysics Division
director. "Taking just over four years from receiving the project go-ahead
to launch, this low-cost Explorer mission will use new mirror and detector
technology that was developed in NASA's basic research program and tested in
NASA's scientific ballooning program. The result of these modest investments is
a small space telescope that will provide world-class science in an important
but relatively unexplored band of the electromagnetic spectrum."
NuSTAR will study black holes that are
big and small, far and near, answering questions about the formation and
physics behind these wonders of the cosmos. The observatory will also
investigate how exploding stars forge the elements that make up planets and
people, and it will even study our own sun's atmosphere.
The observatory is able to focus the
high-energy X-ray light into sharp images because of a complex, innovative
telescope design. High-energy light is difficult to focus because it only
reflects off mirrors when hitting at nearly parallel angles. NuSTAR solves this
problem with nested shells of mirrors. It has the most nested shells ever used
in a space telescope, 133 in each of two optic units. The mirrors were molded
from ultra-thin glass similar to that found in laptop screens and glazed with
even thinner layers of reflective coating.
The telescope also consists of
state-of-the-art detectors and a lengthy 33-foot (10-meter) mast, which
connects the detectors to the nested mirrors, providing the long distance
required to focus the X-rays. This mast is folded up into a canister small
enough to fit atop the Pegasus launch vehicle. It will unfurl about seven days
after launch. About 23 days later, science operations will begin.
NuSTAR is a Small Explorer mission led
by Caltech and managed by JPL for NASA's Science Mission Directorate in
Washington. The spacecraft was built by Orbital Sciences Corporation in Dulles,
Va. Its instrument was built by a consortium including Caltech; JPL; University
of California at Berkeley (UC Berkeley); Columbia University in New York;
NASA's Goddard Space Flight Center in Greenbelt, Md.; the Danish Technical
University in Denmark; Lawrence Livermore National Laboratory in Livermore,
Calif.; and ATK Aerospace Systems in Goleta, Calif. NuSTAR will be operated by
UC Berkeley, with the Italian Space Agency providing its equatorial ground
station located at Malindi, Kenya. The mission's outreach program is based at
Sonoma State University in Rohnert Park, Calif. NASA's Explorer Program is
managed by Goddard. JPL is managed by Caltech for NASA.
For more information, visit http://www.nasa.gov/nustar.
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