135 citations · 797 across the 51 of their papers we have counts for
52 papers
BV photometry of the cataclysmic variable LY UMa
L. Dankova, D. Marchev, S. Peneva +1
We performed B- and V-band photometry of the probable dwarf nova LY UMa. We find that it has apparent magnitude V=15.26+/-0.03 on 2024-04-14, V=15.43+/-0.02 on 2025-04-28, and V =…
Photometric monitoring of PMS stars with the telescopes at Rozhen Observatory
Evgeni Semkov, Sunay Ibryamov, Stoyanka Peneva +1
For several decades we have been performing photometric monitoring of some of the star formation regions. Significant place in our program take observations of objects of the type…
Study of the long-term photometric variability of eight PMS stars in the young open cluster Trumpler 37
Sunay Ibryamov, Gabriela Zidarova, Evgeni Semkov +1
This paper reports results from our long-term photometric CCD observations of eight pre-main-sequence stars collected from June 2008 to October 2022. These stars are l…
Long-term Photometric Study of the Pre-main Sequence Star V1180 Cas
Asen Mutafov, Evgeni Semkov, Stoyanka Peneva +1
In this paper results from the optical photometric observations of the pre-main-sequence star V1180 Cas are reported. The star is a young variable associated with the dark cloud Ly…
Long-term optical photometry of the PMS stars V2764 Ori and LkH 301 in the field of the McNeil's Nebula
G. Zidarova, S. Ibryamov, E. Semkov +1
In this paper, we present results from long-term photometric observations of the pre-main-sequence stars V2764 Ori and LkH 301, located in the field of the McNeil's…
The FUor star V2493 Cyg (HBC 722) -- eleven years at maximum brightness
Evgeni Semkov, Sunay Ibryamov, Stoyanka Peneva
At the time of stellar evolution, young stellar objects go through processes of increased activity and instability. Star formation takes place in several stages during which the st…