It aims to detect up to three million supermassive black holes many of which are unknown and X-rays from as many as stars in the Milky Way.
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‘Spectrum-Roentgen-Gamma (SRG) telescope’:
- Spectrum-Roentgen-Gamma (SRG) is a space telescope, it is being launched by a joint team of German-Russian scientists.
- It will create a three-dimensional (3D) X-ray map of the universe and unveil unknown supermassive black holes, dark energy and stars.
- It will be launched into space on a Russian-built Proton-M rocket from the Baikonur Cosmodrome in Kazakhstan on June 21, 2019.
- The telescope is the first to be sensitive to high-energy ‘hard’ X-rays and map the entire sky.
- SRG will also find how dark matter the main engine of galaxy formation is spread in the universe.
- SRG will not detect gamma radiation.
- SRG was first proposed in 1987, by Russian astrophysicists.
SRG will carry two independent X-ray telescopes:
- A German-built eROSITA (Extended Roentgen Survey with an Imaging Telescope Array)
- A Russian-built ART-XC (Astronomical Roentgen Telescope — X-ray Concentrator)
- Germany’s ROSAT mission in the 1990s was sensitive only to ‘soft’ X-rays, with energies of about 2 keV.
- Existing missions, such as NASA’s Chandra X-ray Observatory and NuSTAR, can see high-energy radiation and resolve tiny details of cosmic structures.