arXiv subjects

Alexander V. Halevin

Publications and source records attributed to Alexander V. Halevin.

2 recordsLinked to original sources

arXiv2003

Population synthesis modeling of the X-ray background with genetic algorithm - based optimization method

We present population synthesis modeling of the X-ray background with genetic algorithm - based optimization method. In our models the best fit could be achieved for lower values of high-energy exponential cut-off (~ 170 keV) and larger amount of the highly obscured (log N_H=25.5) AGNs.

astro-ph↗

arXiv2003

Short time-scale X-ray variability of Active Galactic Nuclei

In this work we have investigated short time-scale variability of NGC 4051 and NGC 4388. The quasi-steady QPO's time scale of 3920$\pm$17 sec was detected for NGC 4051. For the case of NGC 4388 we investigated rapid variability of the parameters of spectral models. To obtain these results, a new "Moving Fit" method for processing of the trailed X-ray spectrograms was developed.

astro-ph↗