Spectrum RG Observatory Launches Second Survey of the Whole Sky

Spectrum RG Observatory Launches Second Survey of the Whole Sky


The Space Research Institute of the Russian Academy of Sciences (IKI RAS) reports that after the Russian telescope ART-XC aboard the Spectrum-RG observatory, the German eROSITA instrument completed its first survey of the entire sky.

The x-ray telescope with slanting optics eROSITA formed a map of the entire celestial sphere, whose area is 41 thousand 253 square degrees. Images of half the sky, which Russian astrophysicists are responsible for processing and analysis, are shown in the illustrations: maps are shown (click to enlarge) in two energy ranges – 0.3–0.7 keV and 0.7–2.3 keV.

On the map, in a softer energy range of 0.3–0.7 keV, as noted, the remnants of supernova explosions and the emission of “warm” interstellar gas with a temperature of hundreds of thousands of degrees Kelvin are clearly visible. In addition, relatively close luminaries with crowns, much more powerful than those of the Sun, are captured.

As for the range of 0.7–2.3 keV, extragalactic objects are manifested primarily in it. These are hundreds of thousands of nuclei of active galaxies and quasars, the radiation of which is associated with the accretion of matter into supermassive black holes, and thousands of massive clusters of galaxies.

Meanwhile, the Spectrum-RG observatory is embarking on a second survey of the entire sky. The spacecraft will be able to complete this work by the end of this year.

The sum of the data from the two reviews will more than double the number of detectable x-ray sources, and comparing the maps will allow us to study the variability of sources and discover new unique objects in the sky“,” The IKI RAS said in a statement.

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