Long-term observations of galaxy 3C 66A     

A. V. Zhovtan  Yu. I. Neshpor  N. A. Zhogolev  E. M. Nehai  Z. N. Skiruta  V. P. Fomin 《Bulletin of the Crimean Astrophysical Observatory》2011,107(1):30-35

Monitoring of the active galaxy nucleus 3C 66A in the VHE γ-ray and analysis of data in X-rays and optical ranges over the period 1996–2009 were carried out. The nature of processes responsible for one or another type of radiation appeared to be very complicated since, at certain periods of time, an either positive or negative correlation may be observed between different types of radiation. Period of radiation P = 365 days in the X-ray range was found.  相似文献   

Correction to: Characteristics of topographic submesoscale eddies off the Crimea coast from high-resolution satellite optical measurements     

Aleskerova  Anna  Kubryakov  Arseny  Stanichny  Sergey  Medvedeva  Alessia  Plotnikov  Evgeniy  Mizyuk  Artem  Verzhevskaia  Liudmila 《Ocean Dynamics》2021,71(6-7):785-791

Ocean Dynamics - A Correction to this paper has been published: https: doi.org/10.1007/s10236-021-01463-y  相似文献   

Observations of active galactic nuclei with GT-48 gamma-ray telescope in 2007–2009     

Yu. I. Neshpor  A. V. Zhovtan  N. A. Zhogolev  E. M. Nehai  Z. N. Skiruta  K. S. Strigunov  V. P. Fomin 《Bulletin of the Crimean Astrophysical Observatory》2012,108(1):91-94

Results of observations of active galactic nuclei with the gamma-telescope GT-48 during 2007?C2009 are presented. It is shown that the very-high-energy (E > 10¹² eV) gamma radiation from galaxies 3C 66A, Mrk 421, Mrk 501, and BL Lac is variable.  相似文献   

Results of observation of Cyg γ-2, BL Lac, 3C66A, Mk 501, and the Crab nebula by the GT-48 gamma-ray telescope in 2006     

Yu. I. Neshpor  A. V. Zhovtan  N. A. Zhogolev  E. M. Nekhai  Z. N. Skiruta  V. V. Fidelis  V. P. Fomin 《Bulletin of the Crimean Astrophysical Observatory》2008,104(1):141-144

The active galactic nuclei BL Lac, 3C66A, and Mk501, as well as the Crab nebula and the Cyg γ-2 source were observed in 2006 at the Crimean Astrophysical Observatory using the GT-48 gamma-ray telescope. Very high energy (VHE) gamma-ray fluxes at a high confidence level (Q > 4) were detected from the active galactic nuclei and the Crab nebula. VHE gamma-ray fluxes from the unidentified gamma-ray source Cyg γ-2 and the X-ray source Cyg X-3 were recorded during observations of Cyg γ-2.  相似文献   

Parameterization of surface wind-driven currents in the Black Sea using drifters,wind, and altimetry data     

Sergey Vladimirovich Stanichny  Arseny Alexandrovich Kubryakov  Dmitry Markovich Soloviev 《Ocean Dynamics》2016,66(1):1-10

  相似文献   

Observations of the flux of very-high-energy gamma rays from the blazar 3C 66A     

A. A. Stepanyan  Yu. I. Neshpor  N. A. Andreeva  O. R. Kalekin  N. A. Zhogolev  V. P. Fomin  V. G. Shitov 《Astronomy Reports》2002,46(8):634-638

Measurements of the flux of very-high-energy (>1 TeV) gamma rays from the blazar 3C 66A obtained over four years are presented. The mean flux over the four-year period was (2.8±0.4)×10^?11 cm^?2 s^?1. There is a correlation between the season-averaged flux of very-high-energy gamma rays and the observed optical radiation.  相似文献   

Variations in the very-high-energy gamma-ray radiation from the blazar H 1426+428     

V. V. Fidelis  Yu. I. Neshpor  V. S. Eliseev  N. A. Zhogolev  E. M. Nekhai  Z. N. Skiruta 《Astronomy Reports》2005,49(11):859-862

Observations of the blazar H 1426+428 were carried with on the GT-48 Cerenkov telescope of the Crimean Astrophysical Observatory from April 15 to April 25, 2004. Analysis of the observational data shows an excess of very-high-energy photons (≥1 TeV) in the direction of the source, with a statistical confidence of 5.8 σ. A flash lasting no more than seven days was detected.  相似文献   

Physical mechanisms of submesoscale eddies generation: evidences from laboratory modeling and satellite data in the Black Sea     

Zatsepin  Andrey  Kubryakov  Arseny  Aleskerova  Anna  Elkin  Dmitry  Kukleva  Olga 《Ocean Dynamics》2019,69(2):253-266

Ocean Dynamics - The observed evidence of the implementation of three different mechanisms of the submesoscale eddies generation in the Black Sea previously studied by the field research and...  相似文献   

The active galaxy 3C 66A: A variable source of very high-energy gamma-rays     

Yu. I. Neshpor  A. A. Stepanyan  O. R. Kalekin  N. A. Zhogolev  V. P. Fomin  N. N. Chalenko  V. G. Shitov 《Astronomy Reports》2000,44(10):641-646

Observations of the very-high-energy gamma-ray flux of the blazar 3C 66A (z=0.444) carried out at the Crimean Astrophysical Observatory with the GT-48 atmospheric Cerenkov detector are reported. The gamma-ray fluxes in 1997 and 1998 were lower than in 1996. The optical luminosity of the object in 1997–1998 also decreased in comparison with its value in 1996. If the emission is isotropic, the very-high-energy gamma-ray power is 10⁴⁶ erg/s.  相似文献   

Seasonal and interannual variability of vertical turbulent exchange coefficient in the Black Sea pycnocline in 2013–2016 and its relation to variability of mean kinetic energy of surface currents     

Podymov  Oleg  Zatsepin  Andrei  Kubryakov  Arseny  Ostrovskii  Alexander 《Ocean Dynamics》2020,70(2):199-211

Ocean Dynamics - In this paper, we analyze seasonal and interannual variability of vertical turbulent diffusion coefficient (Kt). Our calculations are based on the time series from 2013 to 2016,...  相似文献