ART-XC

Strange events occurred near the Earth after solar flare X1.9 on 18 January 2026. That were the arrival of coronal mass ejection on 19 January, followed by record flux of solar protons and geomagnetic storm on 19–21 January. Mikhail Pavlinsky ART-XC telescope aboard Spektr-RG observatory studied the solar flare and the proton event in the vicinity of L2 Lagrange point.

January 13, 2026 Spektr-RG observatory marked 6.5 years since the day of its launch, which is also its guaranteed operational time. Today the observatory has successfully completed its nominal mission and continues studying the Universe in hard X-ray range.

The conference started at IKI on 22 December 2025.

Large solar flares on November 9–11 2025 were the cause of solar mass ejections, which, in turn, resulted in intense geomagnetic storms. On November 10–14 2025 Mikhail Pavlinsky ART-XC telescope onboard Russian Spektr-RG observatory registered the rise in high-energy proton fluxes in L2.

Mikhail Pavlinsly ART-XC X-ray telescope studies the properties of the nuclear stellar disc of the Milky Way.

During its all-sky survey, Mikhail Pavlinsly ART-XC telescope aboard the Spektr-RG observatory discovered a previously unknown X-ray source, SRGA J230631.0+155633. Further studies revealed that this is one of the most powerful and interesting quasars that have existed in the Universe over the past five billion years.

It was not a joke: on the first day of the month the number of energetic solar protons near the Lagrange point L2 increased significantly to around 14 counts per second. This was almost 7 times higher than usual background, registered by ART-XC detectors, and the most prominent rise in 5 years of monitoring Sun's activity.

In 2024, IKI scientists and their colleagues completed the analysis of the data from the Milky Way central region deep survey and the first five all-sky surveys (2019–2022) made by Mikhail Pavlinsky ART-XC telescope onboard Spektr-RG X-ray observatory.