R. A. Chigladze
A5013787455- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Planetary Science and Exploration
- Gamma-ray bursts and supernovae
- Particle Accelerators and Free-Electron Lasers
- Calibration and Measurement Techniques
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Geomagnetism and Paleomagnetism Studies
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Gyrotron and Vacuum Electronics Research
- Solar and Space Plasma Dynamics
- Geophysics and Gravity Measurements
- Space Exploration and Technology
- Islamic Thought and Society Studies
- Control and Dynamics of Mobile Robots
- Material Science and Thermodynamics
- Medieval and Classical Philosophy
- Relativity and Gravitational Theory
- History and Developments in Astronomy
- Elasticity and Wave Propagation
Abastumani Astrophysical Observatory
2013-2024
Samtskhe-Javakheti State University
2020
Ilia State University
2017
Pedagogical University
2011
We analyze the multifrequency behavior of quasar 3C 454.3 during three prominent \gamma-ray outbursts: 2009 Autumn, 2010 Spring, and Autumn. The data reveal a repeating pattern, including triple flare structure, in properties each outburst, which implies similar mechanism(s) location for all events. multi-frequency indicates that lower frequency events are co-spatial with outbursts, although emission varies on shortest timescales. determine variability from UV to IR wavelengths an outburst...
Since 2005, the blazar 3C 454.3 has shown remarkable flaring activity at all frequencies, and during last four years it exhibited more than one γ-ray flare per year, becoming most active in sky. We present for first time multi-wavelength AGILE, Swift, INTEGRAL, GASP-WEBT data collected order to explain extraordinary of which occurred 2010 November. On November 20 (MJD 55520), reached a peak flux (E >100 MeV) Fpγ = (6.8 ± 1.0) × 10−5 photons cm−2 s−1 on timescale about 12 hr, factor six...
Context. The international whole earth blazar telescope (WEBT) consortium planned and carried out three days of intensive micro-variability observations S5 0716+714 from February 22, 2009 to 25, 2009. This object was chosen due its bright apparent magnitude range, high declination, very large duty cycle for micro-variations. Aims. We report here on the long continuous optical light curve obtained during multi-site observing campaign which Blazar showed almost constant variability over a 0.5...
A multifrequency campaign on the BL Lac object PG 1553+113 was organized by Whole Earth Blazar Telescope (WEBT) in 2013 April-August, involving 19 optical, two near-IR, and three radio telescopes. The aim to study source behaviour at low energies during around high-energy observations Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) telescopes April-July. We also analyse UV X-ray data acquired Swift XMM-Newton satellites same period. WEBT satellite allow us detail synchrotron emission...
We present recent optical photometric observations of the blazar OJ 287 taken during September 2015 -- May 2016. Our intense started in November and continued until 2016 included detection large outburst December that was predicted using binary black hole model for 287. For our observing campaign, we used a total 9 ground based telescopes which one is Japan, India, three are Bulgaria, Serbia, Georgia, two USA. These were carried out 102 nights with ~ 1000 image frames BVRI bands, though...
We presented photometric observations for the one UV Ceti type and three W Ursae Majoris-type variable stars. The flare of star lasted about two hours, changed magnitude to 3.9 within minutes. values color indices V-R, rotational periods composite lightcurves have been obtained EW Using a relation an absolute magnitude-period by Mateo Rucinski (2017) interstellar extinction from three-dimensional map Milky Way dust (http://argonaut.skymaps.info) Green et al. (2019), we calculated magnitudes...
Abstract We report the results of our optical ( VRI ) photometric observations TeV blazar 1ES 0806+524 on 153 nights during 2011–2019 using seven telescopes in Europe and Asia. investigated variability intraday as well long-term timescales. examined 18 light curves for flux color variations most reliable power-enhanced F -test nested ANOVA test. Only one night was a small, but significant, variation found, both V -band R curves. The − index constant every those nights. Flux density changes...