PRELIMINARY SCHEDULE:
June 2019
Arrival of the participants
19:30 – Welcome party
June 2019
8:00 – 10:00 – Registration and coffee
10:00 – 10:20 – Official opening
Session 1: Observatories, Instruments and Cooperation
10:20 – 10:50 - E. Semkov - The National Astronomical Observatory Rozhen - current status and plans for upgrade - Invited talk
10:50 – 11:20 - A. Mickaelian - Byurakan Astrophysical Observatory: present and future activities - Invited talk
11:20 – 11:50 - G. Damljanovic et al - Gaia DR2 and Serbian-Bulgarian investigations - Invited talk
11:50 – 12:10 Poster presentations (5 minutes each):
G. Damljanovic - Comparison of photometric results between the Serbian and Bulgarian telescopes and activities in line with Gaia Alerts (Gaia-FUN-TO)
Z. Cvetković - Measurement comparison between CCD frames obtained at NAOR and ASV
G. Latev - Bulgarian - Serbian collaboration:Advantages of the simultaneous observations
G. Latev - CCD parameters evaluation using photon transfer analysis technique
12:00 – 14:00 – Lunch
Session 2: Stars 1
14:00 – 14:20 - I. Stateva - The puzzling Algol-type star with oscillating component GSC 3889-
0202
14:20 – 14:40 - G. Đurašević - UU Cas - massive close binary with accretion disk
14:40 – 15:00 - K. Stoyanov - Spectral observations of High-mass X-ray binaries
15:00 - 15:20 - Y. Nikolov - Spectropolarimetric observation of Be/X-ray binaries X Per and
MWC656
15:20 – 15:40 - N. Tomov – Hot wind in the symbiotic binary AG Peg during its 2015 outburst
15:40 – 16:00 - Poster presentations (5 minutes each):
R. Pavlović - What extent are double stars really binaries to?
Ts. Georgiev - Intra-night flickering of RS Ophiuchi: III. Confirmation of the predicted 8.0, 5.3 and 3.5 min flickering modes
Ts. Georgiev -Intra-night flickering of RS Ophiuchi: IV. Shapes of the repeating structures and their evolution
D. Boneva - Disc’s parameters and the accretion efficiency of two interacting binary stars
16:00 – 16:30 – Coffee break
Session 3: Stars 2
16:30 – 16:50 - I. Bulut - A photometric study of the W UMa–type eclipsing binary system CN And
16:50 – 17:10 - A. Bulut - Orbital period changes in the contact binary V401 Cyg
17:10 – 17:30 - T. Mitnyan - Correlations between chromospheric activity and physical parameters
of contact binary stars
June 2019
Session 4: Solar system and the Sun
9:00 – 9:30 - G. Borisov - The diversity of the chemical composition of the Martian Trojan
asteroids – Invited talk
9:30 – 9:50 - V. Celebonovic - Impact craters formation: some ideas
9:50 – 10:20 - B. Komitov – The solar cycles influence traces in Pinopsida-trees annual rings time
series
10:20 – 10:35 - Poster presentations (5 minutes each):
T. Bonev - Dust released by artificial cosmic impacts: observational and theoretical challenges
Sv. Boeva - Light curve of 15691 Maslov asteroid
N. Petrov - Research on the white-light solar corona and active solar processes during total solar
eclipses
10:35 – 11:00 – Coffee break
Session 5: Interstellar medium and Starforming regions
11:00 – 11:20 - O. Stanchev - Comparative analysis of clump populations in Rosette MC extracted by the methods GAUSSCLUMPS and DENDROGRAMS
11:20 – 11:40 - M. Bogdanova - A study of the hierarchical structure of MC Rosette based on
observational and numerical data.
11:40 – 12:00 - L. Marinkova - On the extraction of power-law tails of the probability density
functions in star-forming clouds
12:00 – 12:05 - Poster presentations (5 minutes each):
L. Slavcheva-Mihova - Star Formation in Mrk 477
12:05 – 14:00 – Lunch
Session 6: Quasistellar Objects & Active Galatic Nuclei
14:00 – 14:20 - V. Bozhilov - Photopolarimetrical Study of Blazar-type AGN OJ287 with the 2m RCC Telescope at NAO Rozhen
14:20 – 14:40 - M. Minev - Optical counterpart of gamma-ray observations of AGNs
14:40 – 15:00 - M. D. Jovanović - Quasiperiodicity of some of the quasars important to ICRF-Gaia CRF link
15:00 – 15:20 - P. Sándor - Lyman limit systems between z=1 and z=2
15:20 – 15:35 - Poster presentations (5 minutes each):
B. Mihov - The light curve analysis of the blazar 3C 454.3
G. Marković - Morphology of some quasars suitable for the link between ICRF and future Gaia CRF
K. Yankova – Advection– fundamental mechanism
15:35 – 16:00 – Coffee break
Session 7: Cosmology & Galaxies
16:00 – 16:20 - B. Nedelchev - Using The Properties of Kinematically Distinct Components as
Fossil Records for Galaxy Formation and Evolution
16:20 – 16:40 - M. Krizek - Why is the proclaimed amount of dark matter overestimated?
16:40 – 17:00 - D. Kirilova - Big Cosmological Influence of Tiny Lepton Asymmetry During BBN
17:00 – 17:20 - U. Sureshkumar - Environmental dependence of properties of galaxies in Galaxy
and Mass Assembly (GAMA) survey and its evolution using Marked statistics
19:30 – Conference dinner
June 2019
Session 8: STARS 3
9:00 – 9:20 - A. Valcheva – Variables in the field of M31 stellar complex OB81
9:20 – 9:50 - N. Markova - Low luminosity late O stars in the VFTS. Classification and main
physical properties – Invited talk
9:50 – 10:10 - Z. Jäger - Supernova analysis with MCMC method.
10:10 – 10:30 - Poster presentations (5 minutes each):
L. Iliev - Evidences for spectral variability of the stable shell star HD 192954
G. Latev - Black body temperature vs. color indices: A grid constructed by data from Filter Profile Service at Spanish Virtual Observatory (SVO)
L. Dankova - Stellar maps of the Northern Sky
N. Taneva - The variable H42 in the M31 stellar complex OB81
10:30 – 11:00 – Coffee break
Session 9: STARS 4
11:00 – 11:20 - A. Bókon - A stochastic sampling method for the analysis of eclipsed pulsations
11:20 – 11:40 - S. Georgiev - Magnetism in Cool Evolved Stars: the Single M-Giants EK Bootis
and β Pegasi
11:40 – 12:00 - A. Antonova - Spectral classification of ultracool dwarf candidates with
OSIRIS/GTC. First detection of Balmer line emission from the dwarf carbon star LSR J2105+2514.
12:00 – 14:00 – Lunch
Session 10: Education and Outreach
14:00 – 14:20 - O. Kuzmanovska - Astronomical alignments and calendars of the peak sanctuary
Kokino
14:20 – 14:40 - E. Bozhurova - Astronomical problems for school olympiads based of moments of
astronomy history
14:40 – 14:50 - Poster presentations (5 minutes each):
I. Jokin - Non-formal education in astronomy
L. Slavcheva-Mihova - IAU 100 Year Celebration in Bulgaria
15:00 – 15:15 - Closing
15:15 – 15:30 - Coffee break
15:30 - 17:00 – BgAS Annual Meeting
17:00 – SREAC Board Meeting
June 2019
13:00 – 17:00 – Astronomy for the public
Excursion to Vitosha mountain/Sofia sightseeing.