This is stated in a message published on the website of Roscosmos.

🤩 Observatory #SpektrRG released its first astronomical “telegram” about observing the activity of a supermassive black hole in the center of the Milky Way -

The observatory has confirmed the high activity of the supermassive black hole of Sagittarius A *

- ROSKOSMOS (@roscosmos) August 14, 2019

"The Spectrum RG Observatory ... conducted a test observation of the galactic center region and confirmed the high activity of a supermassive black hole (mass of 4 million solar masses) Sagittarius A *," the statement says.

It is specified that the observations were carried out using the Russian telescope ART-XC.

In July, the Spektr-RG space observatory, launched by the Proton-M launch vehicle from the Baikonur Cosmodrome, was launched into orbit. Later, scientists received the first satellite image using this device.

Director of the Space Research Institute of the Russian Academy of Sciences Anatoly Petrukovich said that the Russian space telescope "Spectrum-RG" will work on a priority topic for world science - high-energy astrophysics.