XMM

Space telescopes like Hubble and XMM-Newton look out at the furthest reaches of space, collecting light from the youngest galaxies.

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I seem to remember a recent study done of a transiting exoplanet in which emission was sought that may have resulted in detectable auroral-type activity using either XMM-Newton or Chanda.

Ozone on Mars: Two Windows Better Than One | Universe Today

Pink x-ray contours show the extended x-ray emission as observed by XMM-Newton.

Dark Matter in Distant Galaxy Groups Mapped for the First Time | Universe Today

"The ability of XMM-Newton to provide large catalogues of galaxy groups in deep fields is astonishing," said Alexis Finoguenov of the MPE and the University of Maryland, a co-author of the recent Astrophysical Journal ApJ paper which reported the team's results.

Dark Matter in Distant Galaxy Groups Mapped for the First Time | Universe Today

To establish the link between x-ray emission and underlying dark matter, the team used one of the largest samples of x-ray-selected groups and clusters of galaxies, produced by the ESA's x-ray observatory, XMM-Newton.

Dark Matter in Distant Galaxy Groups Mapped for the First Time | Universe Today

The survey covers a 2 square degree equatorial field with imaging by most of the major space-based telescopes including Hubble and XMM-Newton and a number of ground-based telescopes.

Dark Matter in Distant Galaxy Groups Mapped for the First Time | Universe Today

We know this because of Newton; not Isac Newton, but the space telescope XMM-Newton from ESA and a couple of X-ray instruments from NASA (US) and JAXA (Japan).

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"Given the unprecedented catalogues provided by XMM-Newton, we have been able to extend measurements of mass to much smaller structures, which existed much earlier in the history of the Universe," says Alexie Leauthaud of Berkeley Lab's Physics Division, the first author of the ApJ study.

Dark Matter in Distant Galaxy Groups Mapped for the First Time | Universe Today

In 2007, an X-ray source in NGC 300 was discovered with the XMM-Newton X-ray observatory and the Swift Observatory.

Extra-Galactic Whopper Black Hole Breaks Distance Record | Universe Today

As a result of its large effective area, XMM-Newton is the only x-ray telescope that can detect the faint level of emission from distant groups and clusters of galaxies.

Dark Matter in Distant Galaxy Groups Mapped for the First Time | Universe Today