91 citations · 615 across the 31 of their papers we have counts for
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astro-ph.GA2024
Changing Look AGN: An X-ray Look
Lev Titarchuk, Elena Seifina, Yegor Mishin
To date, a number of changing-look (CL) active galactic nuclei (AGNs) are known. We studied, in detail what happens to the X-ray spectrum during the CL events using the example of…
astro-ph.HE2024
SDSS~J075217.84+193542.2: X-ray weighing of a secondary BH
Lev Titarchuk, Elena Seifina
Precise measurements of black hole (BHs) masses are necessary to understand the coevolution of these sources and their host galaxies. Sometimes in the center of a galaxy there is n…