Japanese Space Observatory To Carry NASA X-RAY Instrument

Jul 01, 2005

A pioneering X-ray detector developed at NASA'S Goddard Space Flight Center will launch on board the new Astro-E2 space observatory.
Astro-E2's primary instrument is the high-resolution X-ray Spectrometer (XRS), developed jointly by GSFC and the Japan Aerospace Exploration Agency (JAXA) Institute of Space and Astronautical Science (ISAS). The XRS measures the heat created by the individual X-ray photons (light particles) it collects.

To sense the heat of a single photon, the XRS detector must be cooled to an extremely low temperature, approximately - 460 degrees Fahrenheit. The coldest reaches of space are approximately -454 degrees Fahrenheit.

This will make the XRS colder than space. Using this new technique, scientists can measure higher X-ray energies with a precision about ten times greater than with previous sensors.

"Astro-E2 will showcase an entirely new technology that will not only serve as a test bed for future missions but produce some spectacular science to boot," said Dr. Anne Kinney, director of the Universe Division in NASA's Science Mission Directorate.

"This is the highly anticipated complement to NASA's Chandra X-ray Observatory and Europe's XMM-Newton. Scientists around the world eagerly await the launch," she added.

Astro-E2 was developed at JAXA's ISAS in collaboration with U. S. scientists and other Japanese institutions. The mission will contain three X-ray instruments. Scientists will use these to study phenomena that radiate predominantly in X- rays.

Astro-E2 will study black holes and the creation of chemical elements necessary for life. Key targets include hot gas falling toward black holes; the million-degree ejecta of star explosions filled with newly minted elements such as oxygen and calcium; and the optically invisible gas between stars and galaxies, which comprise most of the ordinary mass in the universe.

"Incoming light particles will raise the temperature of the detector by only a few thousandths of a degree," said Dr. Richard Kelley, Principal Investigator for the U.S. contribution to Astro-E2. "Knowing the precise energy that these light particles carry, we can infer new information about their origins," he added.

Along with the XRS are four X-ray Imaging Spectrometer (XIS) instruments, a collaboration among Japanese institutions and the Massachusetts Institute of Technology; and the Hard X- Ray Detector (HXD), built by the University of Tokyo, ISAS and other Japanese institutions.

The XRS and XIS instruments will analyze X-ray photons focused by individual telescopes, built at GSFC by a team led by Dr. Peter Serlemitsos. The HXD also uses a tested and improved technology.

Astro-E2 will be launched on an M-V rocket and will attain a near-Earth circular orbit at approximately 353.4 miles. The observatory's expected mission lifetime is five years. The observatory will launch July 6 from Japan's Uchinoura Space Center.

With its official name to be bestowed after deployment, Astro-E2 is the fifth in a series of Japanese satellites devoted to studying celestial X-ray sources. Previous missions are Hakucho, Tenma, Ginga, and ASCA.

Copyright 2005 by Space Daily, Distributed by United Press International

Explore further: Video gives astronaut's-eye view inside NASA's Orion spacecraft

add to favorites email to friend print save as pdf

Related Stories

Cyclist's helmet, Volvo car to communicate for safety

8 hours ago

Volvo calls it "a wearable life-saving wearable cycling tech concept." The car maker is referring to a connected car and helmet prototype that enables two-way communication between Volvo drivers and cyclists ...

Recommended for you

SDO captures images of two mid-level flares

Dec 19, 2014

The sun emitted a mid-level flare on Dec. 18, 2014, at 4:58 p.m. EST. NASA's Solar Dynamics Observatory, which watches the sun constantly, captured an image of the event. Solar flares are powerful bursts ...

Why is Venus so horrible?

Dec 19, 2014

Venus sucks. Seriously, it's the worst. The global temperature is as hot as an oven, the atmospheric pressure is 90 times Earth, and it rains sulfuric acid. Every part of the surface of Venus would kill you ...

Image: Christmas wrapping the Sentinel-3A antenna

Dec 19, 2014

The moment a team of technicians, gowned like hospital surgeons, wraps the Sentinel-3A radar altimeter in multilayer insulation to protect it from the temperature extremes found in Earth orbit.

Video: Flying over Becquerel

Dec 19, 2014

This latest release from the camera on ESA's Mars Express is a simulated flight over the Becquerel crater, showing large-scale deposits of sedimentary material.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.