А. С. Москвитин
A5020295279- Gamma-ray bursts and supernovae
- SAS software applications and methods
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Gyrotron and Vacuum Electronics Research
- Particle Accelerators and Free-Electron Lasers
- Earthquake Detection and Analysis
- Solar and Space Plasma Dynamics
- Calibration and Measurement Techniques
- Ionosphere and magnetosphere dynamics
- Nuclear Physics and Applications
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Geophysics and Gravity Measurements
- Planetary Science and Exploration
- Galaxies: Formation, Evolution, Phenomena
- Geophysics and Sensor Technology
- GNSS positioning and interference
- Adaptive optics and wavefront sensing
Special Astrophysical Observatory
2015-2024
Russian Academy of Sciences
2010-2024
Development Agency of Serbia
2024
Kavli Institute for the Physics and Mathematics of the Universe
2020
The University of Tokyo
2020
University of Copenhagen
2011
We present our observations of electromagnetic transients associated with GW170817/GRB 170817A using optical telescopes Chilescope observatory and Big Scanning Antenna (BSA) Pushchino Radio Astronomy Observatory at 110MHz. The detected an transient $\sim19^m$ on the third day in outskirts galaxy NGC 4993; we continued following its rapid decrease. put upper limit $1.5\times10^{4}$ Jy any radio source a duration 10-60 s which may be 170817A. prompt gamma-ray emission consists two distinctive...
We present photometry and spectroscopy of the type IIP supernova 2009bw in UGC 2890 from few days after outburst to 241 days. The light curve SN during photospheric phase is similar that normal SNe but with brighter peak plateau (Mmax R = -17.82 mag, Mplateau -17.37 mag). luminosity drop nebular one fastest ever observed, ~2.2 mag about 13 radioactive tail bolometric indicates amount ejected 56 Ni \approx 0.022 M\odot. spectra reveal high velocity lines H{\alpha} H{\beta} until 105 shock...
We present ground-based and HST optical observations of the transients (OTs) long-duration Gamma Ray Bursts (GRBs) 060729 090618, both at a redshift z = 0.54. For GRB 060729, bumps are seen in light curves (LCs), late-time broadband spectral energy distributions (SEDs) OT resemble those local type Ic supernovae (SNe). dense sampling our has allowed us to detect well-defined LCs, as well change colour, that indicative coming from core-collapse SN. The accompanying SNe for events individually...
We present the low-resolution spectroscopic and UBVRI broad-band photometric investigations of Type IIb supernova 2011fu, discovered in UGC 01626.The follow-up this event has been initiated a few days after explosion covers period about 175 days.The early-phase light curve shows rise followed by steep decay all bands shares properties very similar to that seen case SN 1993J, with possible detection adiabatic cooling phase.Modelling quasi-bolometric suggests progenitor had an extended (∼ 1 ×...
The paper presents a concept for ground-based unmanned automated tracked platform designed the remote survey of snow cover using ground-penetrating radar in hazardous areas, such as avalanche catchment zones. Traditional observation methods, surveys and pit studies, are prohibited these areas safety reasons. Employing an alternative approach—ground-penetrating combined with platform—enables safe research zones while covering extensive territories short period. comprises autonomous module...
We present optical photometric and low-resolution spectroscopic observations of the Type II plateau supernova (SN) 2008in, which occurred in outskirts nearly face-on spiral galaxy M 61. Photometric data X-rays, ultraviolet near-infrared bands have been used to characterize this event. The SN field was imaged with ROTSE-IIIb telescope about seven days before explosion. This allowed us constrain epoch shock breakout JD = 2454825.6. duration phase, as derived from monitoring, ~ 98 days. spectra...
We report optical photometric and Southern Astrophysical Research spectroscopic observations of an X-ray source found within the localization error Fermi Large Area Telescope unidentified γ-ray 1FGL J0523.5−2529. The data show periodic flux modulation radial velocity variations indicative a binary with 16.5 hr period. suggest massive non-degenerate secondary (≳ 0.8 M☉), we argue is likely pulsar binary. velocities have good phase coverage evidence for measurable eccentricity (e = 0.04)....
We report the early discovery of optical afterglow gamma-ray burst (GRB) 140801A in 137 deg$^2$ 3-$\sigma$ error-box Fermi Gamma-ray Burst Monitor (GBM). MASTER is only observatory that automatically react to all alerts. GRB one few GRBs whose counterpart was discovered solely from its GBM localization. The found by Global Robotic Net 53 sec after receiving alert, making it fastest detection a error-box. Spectroscopy obtained with 10.4-m Gran Telescopio Canarias and 6-m BTA SAO RAS reveals...
Abstract Multi-pulsed GRB 190530A, detected by the GBM and LAT onboard Fermi, is sixth most fluent burst so far. This paper presents timing, spectral, polarimetric analysis of prompt emission observed using AstroSat Fermi to provide insight into radiation mechanisms. The time-integrated spectrum shows conclusive proof two breaks due peak energy a second lower break. Time-integrated (55.43 ± 21.30 %) as well time-resolved polarization measurements, made Cadmium Zinc Telluride Imager (CZTI)...
ABSTRACT Optical, near-infrared (NIR) photometric and spectroscopic studies, along with the optical imaging polarimetric results for SN 2012au, are presented in this article to constrain nature of progenitor other properties. Well-calibrated multiband data (from –0.2 +413 d since B-band maximum) were used compute bolometric light curve perform semi-analytical light-curve modelling using minim code. A spin-down millisecond magnetar-powered model explains observed evolution 2012au reasonably....
Abstract We investigate the prompt emission and afterglow properties of short-duration gamma-ray burst (sGRB) 130603B another eight sGRB events during 2012–2015, observed by several multiwavelength facilities including Gran Canarias Telescope 10.4 m telescope. Prompt high energy data were obtained INTEGRAL-SPI-ACS, Swift-BAT, Fermi-GBM satellites. The INTEGRAL in range 0.1–10 MeV for 130603B, 140606A, 140930B, 141212A, 151228A do not show any signature extended or precursor activity their...
The ejecta composition is an open question in gamma-ray bursts (GRB) physics. Some GRBs possess a quasi-thermal spectral component the time-resolved analysis, suggesting hot fireball origin. Others show featureless non-thermal spectrum known as "Band" function, consistent with synchrotron radiation origin and that jet Poynting-flux-dominated at central engine likely emission region well. There are also showing sub-dominant thermal dominant hybrid composition. Here we report extraordinarily...
We present a wide dataset of gamma-ray, X-ray, UVOIR, and radio observations the Swift GRB100814A. At end slow decline phase X-ray optical afterglow, this burst shows sudden prominent rebrightening in band only, followed by fast decay both bands. The also chromatic evolution. Such puzzling behaviour cannot be explained single component model. discuss other possible interpretations, we find that model incorporates long-lived reverse shock forward fits temporal spectral properties GRB100814A best.
Context. GRB 221009A, initially detected as an X-ray transient by Swift , was later revealed to have triggered the Fermi satellite about hour earlier, marking it a post-peak observation of event’s emission. This distinguished itself brightest ever recorded, presenting unparalleled opportunity probe complexities physics. The unprecedented brightness, however, challenged efforts, led saturation several high-energy instruments. Aims. Our study seeks investigate nature INTEGRAL-detected 221009A...