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Black-hole mass estimation through accretion disk spectral fitting for high-redshift blazars
G. Kyriopoulos, M. Petropoulou, G. Vasilopoulos +1
High-redshift () blazars, with relativistic jets aligned toward us, probe the most powerful end of the active galactic nuclei (AGN) population. We aim at determining the black…
Deep XMM-Newton observations of the northern disk of M31 II: Tracing the hot interstellar medium
Patrick J. Kavanagh, Manami Sasaki, Dieter Breitschwerdt +10
Aims: We use new deep XMM-Newton observations of the northern disk of M 31 to trace the hot interstellar medium (ISM) in unprecedented detail and to characterise the physical prope…
Clarifying the population of HMXBs in the Small Magellanic Cloud
Grigoris Maravelias, Andreas Zezas, Vallia Antoniou +2
Almost all confirmed optical counterparts of HMXBs in the SMC are OB stars with equatorial decretion disks (OBe). These sources emit strongly in Balmer lines and standout when imag…
Deep XMM-Newton observations of the northern disc of M31. I. Source catalogue
M. Sasaki, F. Haberl, M. Henze +12
We carried out new observations of two fields in the northern ring of M31 with XMM-Newton with two exposures of 100 ks each and obtained a complete list of X-ray sources down to a…
Identification of two new HMXBs in the LMC: a 2013 s pulsar and a probable SFXT
G. Vasilopoulos, C. Maitra, F. Haberl +2
We report on the X-ray and optical properties of two high-mass X-ray binary systems located in the Large Magellanic Cloud (LMC). Based on the obtained optical spectra, we classify…
X-ray monitoring of classical novae in the central region of M31. III. Autumn and winter 2009/10, 2010/11 and 2011/12
M. Henze, W. Pietsch, F. Haberl +7
[Abridged] Classical novae (CNe) represent the major class of supersoft X-ray sources (SSSs) in the central region of our neighbouring galaxy M31. We performed a dedicated monitori…