Abstract
Context. 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.Aims. We carry out a dedicated optical and X-ray monitoring program of CNe in the bulge of M 31.Methods. We discovered M31N 2007-11a and determined its optical and X-ray light curve. We used the robotic Super-LOTIS telescope to obtain the optical data and XMM-Newton and Chandra observations to discover an X-ray counterpart to that nova.Results. Nova M31N 2007-11a is a very fast CN, exhibiting a very short SSS state with an appearance time of 6-16 days after outburst and a turn-off time of 45-58 days after outburst.Conclusions. The optical and X-ray light curves of M31N 2007-11a suggest a binary containing a white dwarf with MWD > 1.0 M ⊙.
Original language | English (US) |
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Pages (from-to) | L13-L16 |
Journal | Astronomy and astrophysics |
Volume | 498 |
Issue number | 2 |
DOIs | |
State | Published - May 2009 |
Keywords
- Galaxies: individual: M31
- Novae, cataclysmic variables
- Stars: individual: nova M31N 2007-11a-X-rays: galaxies
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science