554 citations · 1.4k across the 56 of their papers we have counts for
58 papers
Catalog of variable stars in the WD 0009+501 and GRW +708247 fields based on photometric survey data on transiting exoplanets
O. Ya. Yakovlev, A. F. Valeev, G. G. Valyavin +15
We present a catalog of 150 variable stars, including 13 stars with exoplanet candidates. 37 stars were identified as variables for the first time. As a result of a 2.5-year photom…
Eight exoplanet candidates in SAO survey
O. Ya. Yakovlev, A. F. Valeev, G. G. Valyavin +15
Here we present eight new candidates for exoplanets detected by the transit method at the Special Astrophysical Observatory of the Russian Academy of Sciences. Photometric observat…
NGC 5474 X-1: a neutron star ULX in an old stellar cluster?
Kirill Atapin, Alexander Vinokurov, Arkadiy Sarkisyan +4
We present the optical and X-ray study of the ultraluminous X-ray source (ULX) NGC 5474 X-1. The X-ray spectrum taken during the bright state of the source ($L_X \sim 2\times10^{40…
New luminous blue variable candidates in the NGC 247 galaxy
Y. Solovyeva, A. Vinokurov, A. Sarkisyan +6
We search for LBV stars in galaxies outside the Local Group. Here we present a study of two bright sources in the NGC 247 galaxy. Object j004703.27-204708.4 ($M_V=-9.08 \pm 0.…
Ultraluminous X-ray sources with flat-topped noise and QPO
K. Atapin, S. Fabrika, M. D. Caballero-Garcia
We analyzed the X-ray power density spectra of five ultraluminous X-ray sources (ULXs) NGC5408 X-1, NGC6946 X-1, M82 X-1, NGC1313 X-1 and IC342 X-1 that are the only ULXs which dis…
Optical Counterparts of ULXs and Their Host Environments in NGC 4490/4485
Senay Avdan, Aysun Akyuz, Alexander Vinokurov +6
We report the identification of the possible optical counterparts of five out of seven Ultraluminous X-ray Sources (ULXs) in NGC 4490/4485 galaxy pair. Using archival Hubble Space…