Variable stars towards the bulge of M31: the AGAPE catalogue

Abstract

We present the AGAPE astrometric and photometric catalogue of 1579 variable stars in a 14'x10' field centred on M31. This work is the first survey devoted to variable stars in the bulge of M31. The R magnitudes of the objects and the B-R colours suggest that our sample is dominated by red long-period variable stars (LPV), with a possible overlap with Cepheid-like type II stars. Twelve nova candidates are identified. Correlations with other catalogues suggest that 2 novae could be recurrent novae and provide possible optical counterparts for 2 supersoft X-ray sources candidates observed with Chandra.

11 pages, Latex, accepted for publication in A&A

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• Recurrent Novae in M31
• A Close Look at the Population of Supersoft and Quasi-Soft X-Ray Sources Observed in M31 with XMM-Newton
• Pixel lensing: Microlensing towards M31
• The Wendelstein Calar Alto Pixellensing Project (WeCAPP): The M31 Variable Star Catalogue
• Microlensing toward crowded fields: Theory and applications to M31
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• The Wendelstein Calar Alto Pixellensing Project (WeCAPP): the M31 Nova catalogue
• Nainital Microlensing Survey -- detection of short period Cepheids in the disk of M31
• VI-Band Follow-Up Observations of Ultra-Long-Period Cepheid Candidates in M31
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• Modern observations of Hubble's first-discovered Cepheid in M31