143 citations · 896 across the 61 of their papers we have counts for
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Photometric and spectroscopic study of 5 pre-main sequence stars in the vicinity of NGC 7129
Evgeni H. Semkov, Sunay I. Ibryamov, Stoyanka P. Peneva
We present results from long-term optical photometric and spectroscopic observations of 5 pre-main sequence stars, located in the vicinity of the bight nebula NGC 7129. We obtained…
New four-color optical photometry of the young stars V521 Cyg and FHO 27
Sunay Ibryamov, Evgeni Semkov
Results from new BVRI photometric observations of the pre-MS stars V521 Cyg and FHO 27 collected during the period from February 2015 to July 2019 are presented. These stars are em…
The beamed jet and quasar core of the distant blazar 4C 71.07
C. M. Raiteri, M. Villata, M. I. Carnerero +5
The object 4C 71.07 is a high-redshift blazar whose spectral energy distribution shows a prominent big blue bump and a strong Compton dominance. We present the results of a two-yea…
Optical Variability of TeV Blazars on long time-scales
Haritma Gaur, Alok C. Gupta, R. Bachev +12
We present the results of photometric observations of three TeV blazars, 3C 66A, S5 0954+658 and BL Lacertae, during the period 2013--2017. Our extensive observations were performe…