6 papers
Supersoft X-rays reveal a classical nova in the M 31 globular cluster Bol 126
M. Henze, W. Pietsch, F. Haberl +17
[Abridged] Classical novae (CNe) represent the main class of supersoft X-ray sources (SSSs) in the central region of our neighbouring galaxy M 31. Only three confirmed novae and th…
X-ray monitoring of classical novae in the central region of M 31. II. Autumn and winter 2007/2008 and 2008/2009
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 M 31. We performed a dedicated monitor…
Recent discoveries of supersoft X-ray sources in M 31
M. Henze, W. Pietsch, F. Haberl +9
Classical novae (CNe) have recently been reported to represent the major class of supersoft X-ray sources (SSSs) in the central area of our neighbouring galaxy M 31. This paper pre…
Spectroscopy of the bright optical counterparts of X-ray sources in the direction of M 31. II
Paolo Bonfini, Despina Hatzidimitriou, Wolfgang Pietsch +1
A recent survey of the Local Group spiral galaxy M 31 with XMM-Newton yielded a large number of X-ray sources. This is the second in a series of papers with the aim of identifying…
The very short supersoft X-ray state of the classical nova M31N 2007-11a
M. Henze, W. Pietsch, G. Sala +9
Short supersoft X-ray source (SSS) states (durations < 100 days) of classical novae (CNe) indicate massive white dwarfs that are candidate progenitors of supernovae type Ia. We car…
The first two transient supersoft X-ray sources in M 31 globular clusters and the connection to classical novae
M. Henze, W. Pietsch, F. Haberl +12
Classical novae (CNe) have been found to represent the major class of supersoft X-ray sources (SSS) in our neighbour galaxy M 31. We determine properties and evolution of the two f…