Научные результаты

We report continued long-term broadband radio and optical brightening of the compact steep-spectrum (CSS) quasar 3C 138, with the variability amplitude increasing toward higher frequencies.  Читать далее →

We present a technique to search for fast radio bursts in records obtained with broadband radiometers having few radio channels. Читать далее →

We report significant cm-band radio brightening of the flat-spectrum radio quasar (FSRQ) PKS 1725+123 observed with the RATAN-600 and RT-32 radio telescopes. Читать далее →

We present results from our European VLBI Network (EVN) and Giant Meterwave Radio Telescope (GMRT) observations of the radio continuum and spectral line emission in IRAS 17526+3253, along with an analysis of its arcsecond-scale radio properties using archival Very Large Array (VLA) data. Читать далее →

A sample of objects with steep and ultra-steep spectra was prepared from radio sources of the Cold experiment surveys conducted on the RATAN-600 radio telescope.  Читать далее →

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This study is denoted to the cosmological "angular size - redshift" test. An analysis is performed of the angular and linear sizes of galaxies from the new ASTRODEEP-JWST catalogue, which contains over 500,000 objects at high redshifts (up to ~20 photometrically determined and up to ~14 spectroscopically determined). Читать далее →

We report on a detailed study of a luminous, heavily obscured (NH ~ 2 × 10^23 cm^-2), radio-loud quasar SRGA J230631.0+155633 discovered in the 4-12 keV energy band by the Mikhail Pavlinsky ART-XC telescope aboard the SRG observatory during the first two years of its all-sky X-ray survey in 2020-2021. Читать далее →

The significant brightening of the flat spectrum radio quasar OP 313 (BZU J1310+3220, 4FGL J1310.5+3221) was recently been reported in gamma-ray (ATel #17167), near-infrared (ATel #17179) and optical bands (ATel #17173, #17184, #17185) over the past two weeks. Читать далее →

We present the results of a three-year X-ray, optical, and radio polarimetric monitoring campaign of the prototypical black hole X-ray binary Cyg X-1, conducted from 2022 to 2024. Читать далее →

The advancement of observational technologies and software for processing and visualizing spectro-polarimetric microwave data obtained with the RATAN-600 radio telescope opens new opportunities for studying the physical characteristics of solar plasma at the levels of the chromosphere and corona. Читать далее →

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In 2024 the enhanced gamma-ray activity from 3C 138, also known as 4FGL J0521.2+1637, was observed with the Fermi/LAT (Large Area Telescope) (ATel #16845). Читать далее →

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High-redshift active galactic nuclei (AGN) provide key insights into early supermassive black hole growth and cosmic evolution. This study investigates the parsec-scale properties of 86 radio-loud quasars at z ≥ 3 using very long baseline interferometry (VLBI) observations. Читать далее →

The KM3NeT experiment reported the detection of an ultra-high-energy neutrino with an energy estimate of ~ 220 PeV, the most energetic yet observed.  Читать далее →

During current long-term monitoring of microquasars we have detected the bright flare from the microquasar GRS1915+105 with the RATAN-600 radio telescope. Читать далее →

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Analysis of more than 300 M-class solar flares observed with the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory in the 131 Å channel, revealed 16 events of sloshing oscillations in hot solar coronal loops. Читать далее →

The existence of continuous cooling and heating processes is an important condition governing the behavior of the solar corona, which is characterized by temperatures of several million Kelvin. These processes can be significantly influenced by small-scale coronal formations, which largely determine the thermal balance of the corona and solar-wind disturbances.  Читать далее →

Blazars are beamed active galactic nuclei (AGNs) known for their strong multi-wavelength variability on timescales ranging from years down to minutes. Many different models have been proposed to explain this variability. Читать далее →