416 citations
- Institute of Astronomy and National Astronomical ObservatoryBG62 papers
- Bulgarian Academy of SciencesBG46 papers
- Instituto de Astrofísica de AndalucíaES14 papers
- Astronomical ObservatoryRS13 papers
- Instituto de Astrofísica de CanariasES13 papers
- National Central UniversityTW13 papers
- Sofia University "St. Kliment Ohridski"BG12 papers
- Evgeni Kharadze Georgian National Astrophysical ObservatoryGE11 papers
- Kazan Federal UniversityRU11 papers
- Osservatorio Astrofisico di TorinoIT11 papers
- Universidad de La LagunaES11 papers
- Pulkovo ObservatoryRU10 papers
106 papers
Photometry with the new 1.5-meter telescope of the Rozhen Observatory
E. Semkov, N. Petrov, M. Minev +6
The new 1.5~m telescope (AZ1500) is operating at the National Astronomical Observatory Rozhen, Bulgaria. This paper gives an overview of the telescope and presents a snapshot of th…
Optical variability of the blazar 3C 371: from minute to year timescales
J. Otero-Santos, C. M. Raiteri, J. A. Acosta-Pulido +41
The BL Lac object 3C 371 has been observed by the Transiting Exoplanet Survey Satellite (\textit{TESS}) for approximately a year, between July 2019 and July 2020, with an unmatched…
The variability patterns of the TeV blazar PG 1553+113 from a decade of MAGIC and multi-band observations
MAGIC Collaboration, H. Abe, S. Abe +264
PG 1553+113 is one of the few blazars with a convincing quasi-periodic emission in the gamma-ray band. The source is also a very high-energy (VHE; >100 GeV) gamma-ray emitter. To b…
Multi-year characterisation of the broad-band emission from the intermittent extreme BL Lac 1ES~2344+514
H. Abe, S. Abe, V. A. Acciari +232
The BL Lac 1ES 2344+514 is known for temporary extreme properties (e.g., a shift of the synchrotron SED peak energy above 1keV). While those extreme states were so fa…
Study of the long-term photometric variability of eight PMS stars in the young open cluster Trumpler 37
Sunay Ibryamov, Gabriela Zidarova, Evgeni Semkov +1
This paper reports results from our long-term photometric CCD observations of eight pre-main-sequence stars collected from June 2008 to October 2022. These stars are l…
The optical behaviour of BL Lacertae at its maximum brightness levels: a blend of geometry and energetics
C. M. Raiteri, M. Villata, S. G. Jorstad +13
In 2021 BL Lacertae underwent an extraordinary activity phase, which was intensively followed by the Whole Earth Blazar Telescope (WEBT) Collaboration. We present the WEBT optical…