Spektr-RG completed the third survey of the entire sky.
On June 16, 2021, the Russian X-ray space observatory "Spektr-RG" completed the third survey of the entire sky and moved on to the fourth.
"Every day, the observatory sends 500-700 MB of telemetric information to Earth, which, when further processed, turns into terabytes of the most valuable scientific information," explains Alexander Lutovinov, Deputy Director of the ICI RAS and scientific director of the Pavlinsky ART-XC telescope. — "This is a huge amount of data, researchers in Russia and Germany are already actively working with them. Based on the results of each survey, maps of the entire sky are compiled, which are then compiled or analyzed to search for astrophysical objects and study their variability. But this is, in fact, only the beginning of the path. The more we "look", the more detailed our maps are, and at the end of the "survey" stage of the mission, we hope to get the most detailed data about what is happening in the X-ray Universe."
The Russian space observatory "Spektr-RG" was launched into space on July 13, 2019 and in December of the same year began to perform the first task of its mission — to conduct a survey of the entire sky in the X-ray range of electromagnetic radiation with record sensitivity. Located at the Lagrange point, which is 1.5 million km away from Earth, the observatory rotates on its axis in such a way that it conducts a complete survey of the entire celestial sphere in half a year. A total of 8 surveys are planned during the mission, which will form the most detailed X-ray map of the sky to date.
Two X-ray mirror telescopes are installed on board the observatory: the German eROSITA and the Russian ART-XC named after M. N. Pavlinsky. They work in different energy ranges, so their maps will complement each other as a result of their work.
After conducting a survey of the entire sky, which is designed for 4 years, the observatory will conduct observations in the mode of triaxial stabilization of the selected sources and areas of the celestial sphere. This stage will last 2.5 years.