Browsing by Author "Anastasopoulou, Konstantina"

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Average bolometric corrections and optical to X-ray flux measurements as a function of accretion rate for X-ray binaries

Anastasopoulou, Konstantina; Zezas, Andreas; Steiner, James F.; Reig, P. (2022)

In this paper, we use an RXTE library of spectral models from 10 black hole and 9 pulsar X-ray binaries, as well as model spectra available in the literature from 13 extra-galactic ultra-luminous X-ray sources (ULXs). We ...
Discovery of periodicities in two highly variable intermediate polars towards the Galactic centre

Mondal, Samaresh; Ponti, Gabriele; Haberl, Frank; Mori, Kaya; Rea, Nanda; Morris, Mark R.; Campana, Sergio; Anastasopoulou, Konstantina (2023)

Aims: We performed a systematic analysis of X-ray point sources within 1<sub>.</sub>°5 of the Galactic centre using archival XMM-Newton data. While doing so, we discovered Fe K<sub>a</sub> complex emission and pulsation ...
Nonthermal X-Rays from Pulsation-driven Shocks in Cepheids

Fraschetti, Federico; Anastasopoulou, Konstantina; Drake, Jeremy J.; Evans, Nancy Remage (2023)

Rapid X-ray phase-dependent flux enhancement in the archetype classical Cepheid star d Cep was observed by XMM-Newton and Chandra. We jointly analyze thermal and nonthermal components of the time-resolved X-ray spectra ...

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