201 citations · 249 across the 5 of their papers we have counts for
5 papers
Correlation of IR and Opticical Variability in NGC4151
V. L. Oknyanskij, V. M. Lyuty, O. G. Taranova +1
We combine all published NIR and optical photometrical observations of NGC 4151 as well as our new unpublished yet data which can be used for determination of time delays between o…
Variability of the Halpha emission of Cygnus X-1 and its connection with the soft X-ray radiation
A. E. Tarasov, C. Brocksopp, V. M. Lyuty
High-resolution Halpha monitoring of Cyg X-1, HD226868 was carried out during 1996-2002 and the resultant spectra analysed in conjunction with 1.5-12 keV X-ray monitoring. We demon…
Steps Toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XVI. A Thirteen-Year Study of Spectral Variability in NGC 5548
B. M. Peterson, the International AGN Watch
We present the final installment of an intensive 13-year study of variations of the optical continuum and broad H-beta emission line in the Seyfert 1 galaxy NGC 5548. The data base…
One Hundred Years of Observations of the Be Star HDE 245770 (the X-ray Binary A0535+26/V725 Tau): The End of an Active Phase
V. M. Lyuty, G. V. Zaitseva
UBV observations of the X-ray binary system A0535+26/V725 Tau at the Crimean Station of the Sternberg Astronomical Institute in 1980-1998 are presented. Based on our and published…
An Improved Orbital Ephemeris for Cygnus X-1
C. Brocksopp, A. E. Tarasov, V. M. Lyuty +1
By accumulating all available radial velocity data and combining it with our own spectroscopy we present a new and improved ephemeris for Cygnus X-1 (V1357 Cygni/HDE226868). We ini…