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We observed the middle-aged radio pulsar B0656+14 with a CCD detector at the 6-m telescope. Broadband BVRI images show the following magnitudes of the pulsar counterpart: B = 24.85(+0.19,−0.16), V = 24.90(+0.16,−0.14), R = 24.52(+0.12,−0.11), I = 23.81(+0.27,−0.21). We fitted the UV-optical (space + ground-based) data with a two-component model which(More)
Particle acceleration is intrinsic to the primary energy release in the impulsive phase of solar ares, and we cannot understand ares without understanding acceleration. New observations in soft and hard X-rays, -rays and coherent radio emissions are presented, suggesting are fragmentation in time and space. X-ray and radio measurements exhibit at least ve(More)
  • V V Grechnev, V G Kurt, +9 authors N P Prestage
  • 2005
The famous extreme solar and particle event of 20 January 2005 is analyzed from two perspectives. Firstly, using multi-spectral data, we study temporal, spectral, and spatial features of the main phase of the flare, when the strongest emissions from microwaves up to 200 MeV gamma-rays were observed. Secondly, we relate our results to a long-standing(More)
We present the earliest BTA (SAO RAS 6-m telescope) spectroscopic observations of the GRB 030329 optical transient (OT), which almost coincide in time with the first “break” (t ∼ 0.5 day after the GRB) of the OT light curve. The BTA/MPFS (Multi-Pupil Fiber Spectrograph) spectra are clearly not smooth: the OT spectra showed a continuum with several broad(More)
The data of BVR observations of the middle-age radio pulsar PSR 0656+14 on January, 20/21 at the BTA (6-m) are presented. The brightness is determined in Cousins B filter B ≈ 25.1 with λeff = 4448Å in adjacent for HST F130LP long-pass filter of a star-like object, coinciding with the position of VLA radio source. Relatively large observed V and R fluxes ( ∼(More)
V.G. Kurt(1), V.V. Sokolov(2), T.A. Fatkhullin(2), V.N. Komarova(2), V.S. Lebedev(2), T.N.Sokolova(2), A.J. Castro-Tirado(3), A. de Ugarte Postigo(3), J. Gorosabel(3)(5) and S. Guziy(4)(3) (1) Astro Space Center of the Russian Academy of Sciences, Moscow 117810 Russia (2) Special Astrophysical Observatory of RAS, Russia (3) Instituto de Astrof́ısica de(More)
A relatively weak solar cosmic ray event registered at the Earth orbit following the flare of December 17, 1976 is discussed. The ma.in feature of the event is the existence of a prolonged unusually high proton and electron anisotropy; even at the end of the decay phase of the flare the motion of the particles were mainly directed away from the Sun.The(More)
We observed the middle-aged radio pulsar 0656+14 with a CCD detector at the 6-m telescope. Broadband BVRI images show the following magnitudes of the pulsar counterpart: B = 24.85(+0.19,−0.16), V = 24.90(+0.16,−0.14), R = 24.52(+0.12,−0.11), I = 23.81(+0.27,−0.21). We fitted the UV-optical (space + ground-based) data with a two-component model which(More)