RXTE reveals the cloudy cores of active galaxies

Using data from NASA’s Rossi X-ray Timing Explorer (RXTE) satellite, an international team has uncovered a dozen instances where X-ray signals from active galaxies dimmed as a result of a cloud of gas moving across our line of sight. The new study triples the number of cloud events previously identified in the 16-year archive.

Fuente : http://www.eurekalert.org/pub_releases/2014-02/nsf…