С. А. Трушкин
A5083648517- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Radio Astronomy Observations and Technology
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Astronomy and Astrophysical Research
- Particle Accelerators and Free-Electron Lasers
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- GNSS positioning and interference
- Astro and Planetary Science
- Superconducting Materials and Applications
- Galaxies: Formation, Evolution, Phenomena
- Magnetic confinement fusion research
- Particle Detector Development and Performance
- Ionosphere and magnetosphere dynamics
- Earthquake Detection and Analysis
- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Advanced Computational Techniques and Applications
- Advanced Research in Science and Engineering
- Mechanics and Biomechanics Studies
Special Astrophysical Observatory
2016-2025
Kazan Federal University
2016-2025
Development Agency of Serbia
1999-2024
Institute of Physics
2017
Karachaevo-Cherkessk State University
2010
European Space Research and Technology Centre
2003
Russian Academy of Sciences
2001
Marshall Space Flight Center
1997
Abstract We report on an observational campaign the bright black hole (BH) X-ray binary Swift J1727.8–1613 centered around five observations by Imaging Polarimetry Explorer. These track for first time evolution of polarization a BH across hard to soft state transition. The 2–8 keV degree decreased from ∼4% ∼3% observations, but angle remained oriented in north–south direction throughout. Based with Australia Telescope Compact Array, we find that intrinsic 7.25 GHz radio aligns polarization....
Abstract We report the first detection of X-ray polarization bright transient Swift J1727.8−1613 with Imaging Polarimetry Explorer. The observation was performed at beginning 2023 discovery outburst, when source resided in hard state. find a time- and energy-averaged degree 4.1% ± 0.2% angle 2.°2 1.°3 (errors 68% confidence level; this translates to ∼20 σ significance detection). This finding suggests that hot corona emitting bulk detected X-rays is elongated, rather than spherical....
We present the first X-ray spectropolarimetric results for Cygnus X-1 in its soft state from a campaign of five IXPE observations conducted during 2023 May-June. Companion multiwavelength data are likewise shown. The 2-8 keV X-rays exhibit net polarization degree PD=1.99%+/-0.13% (68% confidence). signal is found to increase with energy across IXPE's bandpass. polarized an energy-independent angle PA=-25.7+/-1.8 deg. East North This consistent being aligned Cyg X-1's AU-scale compact radio...
With frequent flaring activity of its relativistic jets, Cygnus X‐3 (Cyg X‐3) is one the most active microquasars and only Galactic black hole candidate with confirmed high‐energy γ‐ray emission, thanks to detections by Fermi Large Area Telescope (Fermi/LAT) AGILE. In 2011, Cyg was observed transit a soft X‐ray state, which known be associated emission. We present results multiwavelength campaign covering quenched when radio emission from at weakest spectrum very soft. A giant (∼20 Jy)...
Cygnus X-3 is one of the brightest X-ray and radio sources in Galaxy, well known for its erratic behaviour X-rays as radio, occasionally producing major flares associated with relativistic ejections. However, even after many years observations various wavelength bands Cyg still eludes clear physical understanding. Studying different emission simultaneously microquasars has proved to be a fruitful approach towards understanding these systems, especially by shedding light on accretion disc/jet...
How black holes consume and eject matter has been the subject of intense studies for more than 60 years. The luminosity these systems are often compared to Eddington limit, border at which spherical accretion is inhibited by radiation pressure photons it produces. discovery ultraluminous X-ray sources (ULXs) showed that can proceed even when apparent exceeds limit (Kaaret et al. 2017). High might be produced beaming incident a thick collimated outflow or truly super-Eddington flow. However,...
Abstract We compiled the X-ray and soft gamma-ray observations of Galactic black hole binary XTE J1859$+$226 in 1999–2000 outburst from RXTE, ASCA, BeppoSAX CGRO. Throughout systematic spectral analysis using a two-component model consisting multi-temperature accretion disk plus fraction its flux convolved with an empirical Comptonized powerlaw component, we found that innermost radius ($r_{\rm in}$) temperature ($T_{\rm are very variable time rising phase where Type-A/-B/C low-frequency...
We report on radio observations of the 1999 September event X-ray transient V4641 Sgr (=XTE J1819-254=SAX J1819.3-2525). This was extremely rapid in its rise and decay across radio, optical, wavelengths; X-rays rose to 12 crab within 8 hr faded below 0.1 less than 2 hr. Radio were made with seven telescopes during first day following onset strong event, revealing a source that detected for 3 further weeks by more sensitive telescopes. The resolved even Very Large Array (VLA) images...
We have studied the 1999 soft X-ray transient outburst of XTE J1859+226 at radio and wavelengths. The event was characterized by strong variability in disc, corona jet — particular, a number flares (ejections) took place seemed well-correlated with hard events. Apparently unusual for canonical'soft' transient, there an initial period low/hard state behaviour during rise from quiescence but prior to peak main we show that not only could this be ubiquitous feature outbursts, also it extremely...
We present the AGILE-GRID (Astro-rivelatore Gamma a Immagini LEggero – Gamma-Ray Imaging Detector) monitoring of Cygnus X-3, during period between November 2007 and July 2009. report here whole X-3 in AGILE "pointing" mode data-taking, to confirm that γ-ray activity coincides with same repetitive pattern multiwavelength emission analyze depth overall spectrum by assuming both leptonic hadronic scenarios. Seven intense events were detected this period, typical event lasting one or two days....
We present new high-resolution, multi-epoch, VLBA radio images of the Galactic microquasar SS 433. are able to observe plasma knots in milliarcsecond-scale jets more than 50 days after their launch. This unprecedented baseline time allows us determine bulk launch speed radio-emitting during a flare, using method which we here, and is completely independent optical spectroscopy. also apply this an earlier sequence 39 short daily observations, cover period 433 moved from quiescence into flare....
Cygnus X-3 is a unique microquasar in the Galaxy hosting Wolf-Rayet companion orbiting compact object that most likely low-mass black hole. The source properties are due to interaction of with heavy stellar wind companion. In this paper, we concentrate on very specific period time prior massive outbursts observed from source. During period, so-called hypersoft state, where radio and hard X-ray fluxes found be at their lowest values (or non-detected), soft flux its highest values, sporadic...
Cygnus X-3 (Cyg X-3) is a well-known microquasar producing variable emission at all wavelengths. Cyg prominent X-ray binary relativistic jets, and studying its high energy crucial for the understanding of fundamental acceleration processes in accreting compact objects. Aims. Our goal to study extreme particle {\gamma}-ray production above 100 MeV during special spectral states X- 3 usually characterized by low hard flux enhanced soft states. We observed with AGILE satellite extended time...
The AGILE satellite detected transient high-energy gamma-ray emission from the X-ray binary V404 Cygni, during June 2015 outburst observed in radio, optical, and soft frequencies. activity was by 50-400 MeV energy band, between 2015-06-24 UT 06:00:00 2015-06-26 (MJD 57197.25 - 57199.25), with a detection significance of ${\sim}4.3{\sigma}$. detection, consistent contemporaneous observation Fermi-LAT, is correlated bright flare at radio hard frequencies, strong enhancement 511 keV line...
We present LOFAR high-band data over the frequency range 115-189 MHz for X-ray binary SS 433, obtained in an observing campaign from 2013 February - 2014 May. Our results include a deep, wide-field map, allowing detailed view of surrounding supernova remnant W 50 at low radio frequencies, as well light curve 433 determined shorter monitoring runs. The complex morphology is excellent agreement with previously published higher-frequency maps; we find additional evidence spectral turnover...
Aims.Understand the shape and implications of multiband ligth curve GRB 050408, an X-ray rich (XRR) burst.
We describe the current status of CATS (astrophysical CATalogs Support system), a publicly accessible tool maintained at Special Astrophysical Observatory Russian Academy Sciences (SAO RAS) (http://cats.sao.ru) allowing one to search hundreds catalogs astronomical objects discovered all along electromagnetic spectrum. Our emphasis is mainly on radio continuum sources observed from 10 MHz 245 GHz, and secondly such as active stars, X-ray binaries, planetary nebulae, HII regions, supernova...
In 2009, Cygnus X-3 (Cyg X-3) became the first microquasar to be detected in GeV γ-ray regime, via satellites Fermi and AGILE. The addition of this new band observational toolbox holds promise for building a more detailed understanding relativistic jets other systems. We present rich data set radio, hard soft X-ray, observations Cyg made during flaring episode 2010 May. detect ∼3 day softening recovery X-ray emission, followed almost immediately by ∼1 Jy radio flare at 15 GHz, 4.3σ (E > 100...
Abstract We present model fits to the X-ray line spectrum of well-known high-mass binary Cyg X-3. The primary observational data set is a taken with Chandra Observatory High Energy Transmission Grating in 2006, though we compare it all other observations this source so far by instrument. show that density must be ≥10 12 cm −3 region responsible for most emission. discuss influence dust scattering halo on broadband spectrum, and argue extinction not likely origin narrow feature seen near Si K...
We present the results from a multiwavelength campaign of GRS 1915+105 performed 2000 April 16 to 25. This is one largest coordinated set observations ever for this source, covering wide energy band in radio (13.3-0.3 cm), near-infrared (J-H-K), X-rays and Gamma-rays (from 1 keV 10 MeV). During was predominantly "plateau" (or low/hard) state but sometimes showed soft X-ray oscillations: before 20.3, rapid, quasi-periodic (~= 45 min) flare-dip cycles were observed. The flares observed on 17...
We present observations of the afterglow GRB 080319B at optical, mm and radio frequencies from a few hours to 67 days after burst. Present along with other published multi-wavelength data have been used study light-curves spectral energy distributions burst afterglow. The nature this brightest cosmic explosion has explored based on observed properties it's comparison models. Our results show that features fits equally good Inter Stellar Matter Wind density profiles circum-burst medium. In...