A weekend of Science and Engineering Fun

This past weekend, the Chandra team had a great time at the USA Science & Engineering Festival. From nearly the start of the day on Saturday through the end of Sunday, there was a steady stream of people stopping by. Those who did attend had to deal with street closures from road races, as well the regular DC activity around the National Mall. Everyone was rewarded, however, with some fabulous autumn weather – sunny and dry.

Accelerating Returns in X-ray Astronomy

In its relatively short 50 year history, the field of X-ray astronomy has shed a whole new light on our view of the universe, and has seen a dizzying rate of technological advancement. Prior to the 1960's, only the Sun was a known source of high energy radiation in X-rays and gamma-rays. These wavelengths of light are absorbed by Earth's atmosphere, so X-ray astronomy depended on advancements in rocketry and space science to be fully explored.

What Lies Beneath? Magnetar Enigma Deepens

SGR 0418+5729

Illustration: NASA/CXC/M.Weiss

Observations with NASA's Chandra, Swift, and Rossi X-ray observatories, Fermi Gamma-ray Space Telescope, and ESA's XMM-Newton have revealed that a slowly rotating neutron star with a comparatively very weak surface magnetic field is giving off bursts of X-rays and gamma rays. This discovery may indicate the presence of an internal magnetic field much more intense than the surface magnetic field, with implications for how the most powerful magnets in the cosmos evolve.

Pushing the Envelope


G327.1-1.1 is the aftermath of a massive star that exploded as a supernova in the Milky Way galaxy. A highly magnetic, rapidly spinning neutron star called a pulsar was left behind after the explosion and is producing a wind of relativistic particles, seen in X-rays by Chandra and XMM-Newton (blue) as well as in the radio data (red and yellow). This structure is called a pulsar wind nebula. The likely location of the spinning neutron star is shown in the labeled version. The large red circle shows radio emission from the blast wave, and the composite image also contains infrared data from the 2MASS survey (red, green, and blue) that show the stars in the field.

Women in the High-Energy Universe: Janet DePonte Evans

Janet DePonte Evans is the Software Development Manager for the Chandra X-ray Center Data System (CXCDS) group, which provides end-to-end scientific software for Chandra's mission operations. This includes software to manage the scientific proposals, mission planning software prior to an observation, and then the software to reduce and analyze the scientific data returned from the telescope. Janet's group also developed and maintains the Chandra data archive and interfaces that allow scientists to retrieve Chandra data for further study.

Sky coverage image in Galactic coordinates

Chandra Finds Evidence for Stellar Cannibalism

BP Psc

The composite image on the left shows X-ray and optical data for BP Piscium (BP Psc), a more evolved version of our Sun about 1,000 light years from Earth. Chandra X-ray Observatory data are colored in purple, and optical data from the 3-meter Shane telescope at Lick Observatory are shown in orange, green and blue. BP Psc is surrounded by a dusty and gaseous disk and has a pair of jets several light years long blasting out of the system. A close-up view is shown by the artist's impression on the right. For clarity a narrow jet is shown, but the actual jet is probably much wider, extending across the inner regions of the disk. Because of the dusty disk, the star's surface is obscured in optical and near-infrared light. Therefore, the Chandra observation is the first detection of this star in any wavelength.


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