Document Type

Article

Publication Date

5-2009

Publication Title

Astronomy & Astrophysics

Volume

498

Issue

2

Publisher

EDP Sciences

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 tele-scope 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-offtime 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.

Comments

This manuscript has been published in the journal Astronomy & Astrophysics. Please find the published version here (note that a subscription is necessary to access this version):

http://www.aanda.org/articles/aa/abs/2009/17/aa11581-08/aa11581-08.html

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