Resolving short supersoft source states of optical novae in the core of M31

Details Resolving short supersoft source states of optical novae in the core of M31 Resolving short supersoft source states of optical novae in the core of M31

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2513p&link_type=abstract

Chandra proposal ID #10300001

Physics

Scientific paper

We propose to continue the monitoring of the M31 core with 5x23ks XMM EPIC and 5x20ks Chandra HRC-I observations equally distributed from Nov 2008 to mid Feb 2009 to determine additional lightcurves for short SSS states of optical novae. SSS states with <100 d duration indicate accreting massive white dwarfs. They are proposed as SN Ia progenitors and determining their frequency is very important. We will correlate detected sources with novae from optical monitoring. With a nova rate in the field of ~25/yr and SSS states lasting from weeks to years we will follow light curves of many novae. Durations of the nova SSS state will allow us to constrain envelope and whitedwarf masses. We will also monitor time variability of ~200 M31 centre X-ray sources (mostly XRBs).

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