8 papers · 1 filter
Cyclic brightening in the short-period WZ Sge-type cataclysmic variable SDSS J080434.20+510349.2
S. V. Zharikov, G. H. Tovmassian, V. V. Neustroev +8
We have observed a new cataclysmic variable (CV) SDSS J080434.20+510349.2 and study the origin of a long-term variability found in its light curve. Multi-longitude time-resolved ph…
Determination of the basic parameters of the dwarf nova EY Cygni
J. Echevarria, R. Michel, R. Costero +1
High-dispersion spectroscopy of EY Cyg obtained from data spanning twelve years show, for the first time, the radial velocity curves from both emission and absorption line systems,…
Time-resolved observations of the short period CV SDSS J123813.73-033933.0
S. V. Zharikov, G. H. Tovmassian, R. Napiwotzki +2
We observed a new and poorly studied cataclysmic variable (CV) SDSS J123813.73-033933.0 to determine its classification and binary parameters. Simultaneous time-resolved photometri…
Subaru optical observations of the two middle-aged pulsars PSR B0656+14 and Geminga
Yuri A. Shibanov, Sergei V. Zharikov, Viktoria N. Komarova +6
We carried out a deep subarcsecond BRI imaging of the two middle-aged pulsars to establish their properties in the optical range. Both pulsars are detected at >10 sigma level. Gemi…
Radiation efficiencies of the pulsars detected in the optical range
S. Zharikov, Yu. Shibanov, V. Komarova
Using available multiwavelength data for the pulsars of different ages detected in the optical range, we analyze the efficiencies of the conversion of the pulsar spindown power \do…
Time-resolved observations of the short period CV SDSS J123813.73-033933
S. V. Zharikov, G. H. Tovmassian, V. Neustroev +2
We present simultaneous spectral and photometric observations of SDSS J123813.73-033933.0. From Ha radial velocity measurements we determined the orbital period of the system to be…