143 citations · 896 across the 61 of their papers we have counts for
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New light curve solution of V568 Peg and first determination of its fundamental parameters
Diana Kjurkchieva, Sunay Ibryamov
We present V, Rc photometric observations of the short-period W UMa star V568 Peg. They allowed us to improve its period. The light curve solution revealed that V568 Peg is an over…
First observations with the 25 cm telescope of the Shumen Astronomical Observatory
Diana Kjurkchieva, Sunay Ibryamov, Borislav Borisov +3
The first observations with the 25 cm telescope of the Shumen Astronomical Observatory led to the following conclusions: (a) Intra-night observations of variable stars with an ampl…
Intra-night flickering of RS Ophiuchi: I. Sizes and cumulative energies of time structures
Ts. B. Georgiev, R. K. Zamanov, S. Boeva +7
We analyzed 29 pairs of time series in B and V bands of the recurrent nova RS Oph. The observations were carried out in 2008-2017 with duration 0.6 - 3.6 hours, with time resolutio…
Long-term BVRI photometric light curves of 15 PMS stars in the IC 5070 star-forming region
Sunay Ibryamov, Evgeni Semkov, Teodor Milanov +1
This paper reports the results from the multicolor photometric observations of 15 pre-main sequence stars collected in the period 2010 September - 2017 October. The stars from our…
Multicolor photometric behavior of the young stellar object V1704 Cygni
Sunay Ibryamov, Evgeni Semkov, Stoyanka Peneva +1
Results from BVRI photometric observations of the pre-main sequence star V1704 Cyg collected during the time period from August 2010 to December 2017 are presented. The star is loc…
V2492 Cygni: Optical BVRI variability during the period 2010-2017
Sunay I. Ibryamov, Evgeni H. Semkov, Stoyanka P. Peneva
Results from BVRI photometric observations of the young stellar object V2492 Cyg collected during the period from August 2010 to December 2017 are presented. The star is located in…