Zobrazeno 1 - 10
of 213
pro vyhledávání: '"Boeva, S"'
Autor:
Zamanov, R., Boeva, S., Latev, G. Y., Semkov, E., Minev, M., Kostov, A., Bode, M. F., Marchev, V., Marchev, D.
Context: T CrB (NOVA CrB 1946) is a famous recurrent nova with a recurrence timescale of 80 years. Aims: We aim to estimate the colours, luminosity, and mass-accretion rate for T CrB (NOVA CrB 1946) during and after the superactive state. Methods and
Externí odkaz:
http://arxiv.org/abs/2312.04342
Autor:
Carnerero, M. I., Raiteri, C. M., Villata, M., Acosta-Pulido, J. A., Larionov, V. M., Smith, P. S., D'Ammando, F., Agudo, I., Arévalo, M. J., Bachev, R., Barnes, J., Boeva, S., Bozhilov, V., Carosati, D., Casadio, C., Chen, W. P., Damljanovic, G., Eswaraiah, E., Forné, E., Gantchev, G., Gómez, J. L., González-Morales, P. A., Griñón-Marín, A. B., Grishina, T. S., Holden, M., Ibryamov, S., Joner, M. D., Jordan, B., Jorstad, S. G., Joshi, M., Kopatskaya, E. N., Koptelova, E., Kurtanidze, O. M., Kurtanidze, S. O., Larionova, E. G., Larionova, L. V., Latev, G., Lázaro, C., Ligustri, R., Lin, H. C., Marscher, A. P., Martínez-Lombilla, C., McBreen, B., Mihov, B., Molina, S. N., Moody, J. W., Morozova, D. A., Nikolashvili, M. G., Nilsson, K., Ovcharov, E., Pace, C., Panwar, N., Pastor Yabar, A., Pearson, R. L., Pinna, F., Protasio, C., Rizzi, N., Redondo-Lorenzo, F. J., Rodríguez-Coira, G., Ros, J. A., Sadun, A. C., Savchenko, S. S., Semkov, E., Slavcheva-Mihova, L., Smith, N., Strigachev, A., Troitskaya, Yu. V., Troitsky, I. S., Vasilyev, A. A., Vince, O.
We report on long-term multiwavelength monitoring of blazar Mrk 421 by the GLAST-AGILE Support Program of the Whole Earth Blazar Telescope (GASP-WEBT) collaboration and Steward Observatory, and by the Swift and Fermi satellites. We study the source b
Externí odkaz:
http://hdl.handle.net/10150/626278
http://arizona.openrepository.com/arizona/handle/10150/626278
http://arizona.openrepository.com/arizona/handle/10150/626278
Publikováno v:
Serbian Astronomical Journal, Vol 180, Pp 103-107 (2010)
Using the 2 m telescope of the Bulgarian National Astronomical Observatory at Rozhen observations of 30 double or multiple stars were carried out during two half nights on July 20and 21, 2009. This is the fourth series of measurements of CCD frames o
Externí odkaz:
https://doaj.org/article/18d680b69ebb467aa77da2979735f76a
We present a detailed photometric study of the bright cataclysmic variable BG Tri using ground-based observations mainly from Rozhen Observatory, ASAS-SN, TESS, and WASP sky surveys. We report the discovery of a negative superhump with P$_{-sh}$ = 0.
Externí odkaz:
http://arxiv.org/abs/2208.10855
Autor:
Zamanov, R. K., Kostov, A., Moyseev, M., Petrov, N., Nikolov, Y. M., Latev, G. Y., Marchev, D., Boeva, S., Stoyanov, K. A., Minev, M. S., Marti, J., Radeva, V., Sanchez-Ayaso, E., Bode, M. F., Ilkiewicz, K., Nikolov, G., Luque-Escamilla, P. L., Spassov, B., Borisov, B., Marchev, V. D., Kurtenkov, A.
We report photometric observations of the hidden symbiotic star SU Lyn in the optical bands. In five nights we detect a weak flickering in U band with amplitude of about 0.05 magnitudes. No intranight variations are found in B, V, g' and r' bands. Th
Externí odkaz:
http://arxiv.org/abs/2206.10151
Autor:
Zamanov, R. K., Stoyanov, K. A., Kostov, A., Kurtenkov, A., Nikolov, G., Latev, G., Bode, M. F., Marti, J., Luque-Escamilla, P. L., Tomov, N., Nikolov, Y. M., Boeva, S. S.
We present photometric and spectral observations of the symbiotic star ZZ CMi. We detect intranight variability - flickering and smooth variations in U band. The amplitude of the flickering is about 0.10-0.20 mag in U band. In the B band the variabil
Externí odkaz:
http://arxiv.org/abs/2103.06625
Autor:
Stoyanov, K. A., Iłkiewicz, K., Luna, G. J. M., Mikołajewska, J., Mukai, K., Martí, J., Latev, G., Boeva, S., Zamanov, R. K.
We performed high-resolution optical spectroscopy and X-ray observations of the recently identified Mira-type symbiotic star EF Aql. Based on high-resolution optical spectroscopy obtained with SALT, we determine the temperature ($\sim $55 000 K) and
Externí odkaz:
http://arxiv.org/abs/2005.03379
Autor:
Zamanov, R. K., Boeva, S., Stoyanov, K. A., Latev, G., Spassov, B., Kurtenkov, A., Nikolov, G.
We analyse optical photometric data of short term variability (flickering) of the accreting white dwarf in the jet-ejecting symbiotic star MWC560. The observations are obtained in 17 nights during the period November 2011 - October 2019. The colour-m
Externí odkaz:
http://arxiv.org/abs/2004.00511
Autor:
Georgiev, Ts. B., Zamanov, R. K., Boeva, S., Latev, G. Y., Spassov, B., Marti, J., Nikolov, G., Ibryamov, S., Tsvetkova, S. V., Stoyanov, K. A.
We study the photometric behavior of the recurrent nova RS Oph by 58 monitoring light curves (LCs), taken by 5 telescopes. All LCs show repeating time structures with some quasi-periods (QPs) in time scales from minutes to hours. In our previous work
Externí odkaz:
http://arxiv.org/abs/2001.11290
We report photometric observations in Johnson UBV bands of the short term variability of Mira. The amplitude detected is 0.16 mag in B band. Adopting interstellar extinction E(B-V)=0, we find for the flickering source colour B-V=1.3, temperature T=37
Externí odkaz:
http://arxiv.org/abs/1903.03782