I. Molotov
A5000415989- Gamma-ray bursts and supernovae
- SAS software applications and methods
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Pulsars and Gravitational Waves Research
- Planetary Science and Exploration
- Space Satellite Systems and Control
- Astrophysics and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Radio Astronomy Observations and Technology
- Geophysics and Gravity Measurements
- GNSS positioning and interference
- Solar and Space Plasma Dynamics
- Isotope Analysis in Ecology
- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Advanced Research in Science and Engineering
- Nuclear Physics and Applications
- Geology and Paleoclimatology Research
- Laser-induced spectroscopy and plasma
- Spectroscopy and Chemometric Analyses
- Methane Hydrates and Related Phenomena
- CCD and CMOS Imaging Sensors
Keldysh Institute of Applied Mathematics
2015-2024
Ulugh Beg Astronomical Institute
2019
Russian Academy of Sciences
2003-2013
University of North Carolina at Chapel Hill
2011
Pulkovo Observatory
2004-2007
Astro Space Center
1996-2003
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
1999
We present optical and near-infrared (NIR) photometry for three gamma-ray burst supernovae (GRB-SNe): GRB 120729A, 130215A / SN 2013ez 130831A 2013fu. In the case of 2013ez, we also spectroscopy at t-t0=16.1 d, which covers rest-frame 3000-6250 Angstroms. Based on Fe II (5169) Si (II) (6355), our spectrum indicates an unusually low expansion velocity 4000-6350 km/s, lowest ever measured a GRB-SN. Additionally, determined brightness shape each accompanying relative to template supernova (SN...
We report radar observations (2380-MHz, 13-cm) by the Arecibo Observatory and optical light curves observed from eight different observatories collected at Ondřejov of triple near-Earth asteroid system (153591) 2001 SN263. The were obtained over course ten nights spanning February 12–26, 2008 curve made throughout January 12 - March 31, 2008. Both data sets include during object's close approach 0.06558 AU on 20th, delay-Doppler images revealed to be comprised three components, making it...
The spin state of small asteroids can change on a long timescale by the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, net torque that arises from anisotropically scattered sunlight and proper thermal radiation an irregularly-shaped asteroid. secular in rotation period caused YORP effect be detected analysis asteroid photometric lightcurves. We analyzed lightcurves near-Earth (1865) Cerberus, (2100) Ra-Shalom, (3103) Eger with aim to detect possible deviations constant effect. carried...
Aims. Asteroid (1862) Apollo is one of two asteroids in which the YORP effect was detected. We carried out new photometric observations April 2007 to enlarge time line and derive a more precise shape spin state model. also observed another YORP-candidate, asteroid (25143) Itokawa, December 2006 January obtain longer line. An estimation strength on Itokawa based its model from Hayabusa mission predicted deceleration be already observable during apparition.
Abstract The existence of asteroid pairs, two bodies on similar heliocentric orbits, reveals an ongoing process rotational fission among asteroids. This newly found class objects has not been studied in detail yet. Here we choose asteroids (6070) Rheinland and (54827) 2001 NQ8, the most suitable pair for in-depth analysis. First, use available optical photometry to determine their state convex shapes. Rotational pole is very near south ecliptic with a latitude uncertainty about 10°. There...
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...
<i>Context. <i/>Research of asteroid families has been recently refreshed by the discovery very young ones. These are great interest because they represent product their parent body fragmentation before orbital and physical evolutionary processes can change them. A cluster seven objects around largest (1270) Datura is particular it enough known members resides in inner part main belt, facilitating observations.<i>Aims. <i/>We carried out photometric observations two family – asteroids...
Main belt asteroids (6070) Rheinland and (54827) 2001 NQ8 belong to a small population of couples bodies that reside in very similar heliocentric orbits. Vokrouhlický & Nesvorný promoted the term "asteroid pairs," pointing out their common origin within past tens hundreds kyr. Previous attempts reconstruct initial configuration at time separation have led prediction Rheinland's rotation should be retrograde. Here, we report extensive photometric observations this asteroid use light curve...
The rotation states of small asteroids are affected by a net torque arising from an anisotropic sunlight reflection and thermal radiation the asteroids' surfaces. On long timescales, this so-called YORP effect can change asteroid spin directions their periods. We analyzed lightcurves four selected near-Earth with aim detecting secular changes in rates that caused YORP. use lightcurve inversion method to model observed include rate $\mathrm{d} \omega / \mathrm{d} t$ as free parameter...
We measure the degree of linear polarization comet 46P/Wirtanen during two months, embracing perihelion passage in 2018 December with phase angles ranging from {\alpha}=18.1 to 46.4 deg. The polarimetric response PQ obtained resembles what was previously found C/1975 V1 (West). This suggests belongs a group comets high maximum positive polarization. conducted BVRI photometry 46P and either neutral or blue colour its dust which is good accordance measurements While aperture-average...