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astro-ph.IM2018
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…
astro-ph.SR2018★ 12 cited
Spectral observations of X Persei: Connection between H-alpha and X-ray emission
R. Zamanov, K. A. Stoyanov, U. Wolter +2
We present spectroscopic observations of the Be/X-ray binary X Per obtained during the period 1999 - 2018. Using new and published data, we found that during "disc-rise" the expans…