We report X-ray observations of the newly discovered pulsating white dwarf eRASSU J191213.9−441044 with Spectrum Roentgen Gamma and eROSITA (SRG/eROSITA) and...
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PublicationX-ray properties of the white dwarf pulsar eRASSU J191213.9−441044
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PublicationX-ray softening in the new X-ray transient XTE J1719-291 during its 2008 outburst decay
The X-ray transient XTE J1719-291 was discovered with Rossi X-ray Timing Explorer/Proportional Counter Array (RXTE/PCA) during its outburst in 2008 March, which...
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PublicationX-ray spectra of the RIXOS source sample
We present results of an extensive study of the X-ray spectral properties of sources detected in the RIXOS survey, which is a large, nearly complete sample of...
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PublicationX-ray spectral and timing evolution of MAXI J1727-203 with NICER
We present a detailed X-ray spectral and variability study of the full 2018 outburst of MAXI J1727-203 using NICER observations. The outburst lasted...
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PublicationX-ray spectral evolution of SAX J1747.0-2853 during outburst activity and confirmation of its transient nature
SAX J1747.0-2853 is an X-ray transient which exhibited X-ray outbursts yearly between 1998 and 2001, and most probably also in 1976. The outburst of 2000 was...
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PublicationX-ray spectral properties of active galactic nuclei in the Chandra Deep Field South
We present a detailed X-ray spectral analysis of the sources in the 1Ms catalog of the Chandra Deep Field South (CDFS) taking advantage of optical spectroscopy...
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PublicationX-ray spectral properties of the AGN sample in the northern XMM-XXL field
In this paper we describe and publicly release a catalogue consisting of 8445 point-like X-ray sources detected in the XMM-XXL north survey. For the 2512 AGN...
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PublicationX-ray Spectral State is not Correlated with Luminosity in Holmberg II X-1
The ultraluminous X-ray source (ULX) Holmberg II X-1 has been observed over four months in 2009/2010 by the Swift observatory. The source luminosity varied by a...
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PublicationX-ray spectral variability of LINERs selected from the Palomar sample
Context. Variability is a general property of active galactic nuclei (AGN). The way in which these changes occur at X-rays is not yet clearly understood. In the...