Elias Kyritsis

Elias Kyritsis
University of Crete | UOC · Department of Physics

PhD student, Dept. of Physics, Univ. of Crete & Institute of Astrophysics - FORTH ,Greece

About

8
Publications
252
Reads
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10
Citations
Additional affiliations
September 2020 - present
Institute of Astrophysics
Position
  • PhD Student
January 2020 - June 2020
Institute of Astrophysics
Position
  • Master's Student
Description
  • I developed an automated spectral classifier of early types stars (O,B - spectral type) based on machine learning methods.
June 2019 - August 2019
European Space Agency
Position
  • Fellow
Description
  • I analyzed data from the XMM-Newton telescope for the ULX source NGC1313-X2 I used spectral fitting methods in order to understand the behaviour and the evolution of this system.
Education
September 2018 - September 2019
University of Crete
Field of study
  • Advanced Physics and Astrophysics
September 2013 - September 2018
University of Crete
Field of study
  • Physics

Publications

Publications (8)
Preprint
Full-text available
(abridged) We develop a tool for the automated spectral classification of OB stars according to their sub-types. We use the regular Random Forest (RF) algorithm, the Probabilistic RF (PRF), and we introduce the KDE-RF method which is a combination of the Kernel-Density Estimation and the RF algorithm. We train the algorithms on the Equivalent Width...
Article
Context. It is thought that ultraluminous X-ray sources (ULXs) are mainly powered by super-Eddington accreting neutron stars or black holes as shown by the recent discovery of X-ray pulsations and relativistic winds. Aims. This work presents a follow-up study of the spectral evolution over two decades of the pulsing ULX NGC 1313 X-2 in order to und...
Preprint
The $\it{eROSITA}$ Final Equatorial Depth Survey (eFEDS), completed during the calibration and performance verification phase of the $\it{eROSITA}$ instrument on $\it{Spectrum\, Roentgen\, Gamma}$, delivers data at and beyond the final depth of the four-year $\it{eROSITA}$ all-sky survey (eRASS:8), $f_{0.5-2\,\text{ keV}}$ = $1.1\times10^{-14}$ erg...
Preprint
Full-text available
It is thought that ultraluminous X-ray sources (ULXs) are mainly powered by super-Eddington accreting neutron stars or black holes as shown by recent discovery of X-ray pulsations and relativistic winds. This work presents a follow up study of the spectral evolution over two decades of the pulsing ULX NGC 1313 X-2, in order to understand the struct...
Article
Full-text available
We present uniformly reprocessed and re-calibrated data from the RoboPol programme of optopolarimetric monitoring of active galactic nuclei (AGN), covering observations between 2013, when the instrument was commissioned, and 2017. In total, the dataset presented in this paper includes 5068 observations of 222 AGN with Dec > −25○. We describe the cu...
Preprint
Full-text available
We present uniformly reprocessed and re-calibrated data from the RoboPol programme of optopolarimetric monitoring of active galactic nuclei (AGN), covering observations between 2013, when the instrument was commissioned, and 2017. In total, the dataset presented in this paper includes 5068 observations of 222 AGN with Dec > -25 deg. We describe the...

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