13 citations
- Astro Space CenterRU2 papers
- Lomonosov Moscow State UniversityRU2 papers
- University of FerraraIT2 papers
- Centre National de la Recherche ScientifiqueFR1 paper
- George Mason UniversityUS1 paper
- Laboratoire d'Annecy de Physique ThéoriqueFR1 paper
- Russian Academy of SciencesRU1 paper
- Université Savoie Mont BlancFR1 paper
2 papers
astro-ph.HE2020★ 7 cited
Detection of a High-Temperature Blackbody Hump in Black Hole Spectra. The strongly redshifted annihilation line
Lev Titarchuk, Elena Seifina
We discovered a so called high-temperature blackbody (HBB) component, found in the 15 -- 40 keV range, in the broad-band X-ray energy spectra of black hole (BH) candidate sources.…
astro-ph.GA2019★ 13 cited
Spectral index-mass accretion rate correlation and evaluation of black hole masses in AGNs 3C~454.3 and M87
Lev Titarchuk, Elena Seifina, Alexandre Chekhtma +1
We present the discovery of correlations between the X-ray spectral (photon) index and mass accretion rate observed in active galactic nuclei (AGNs) 3C~454.3 and M87. We analyzed s…