The Wendelstein Calar Alto Pixellensing Project (WeCAPP): the M31 Nova catalogue

Abstract

We present light curves from the novae detected in the long-term, M31 monitoring WeCAPP project. The goal of WeCAPP is to constrain the compact dark matter fraction of the M31 halo with microlensing observations. As a by product we have detected 91 novae benefiting from the high cadence and highly sensitive difference imaging technique required for pixellensing. We thus can now present the largest CCD and optical filters based nova light curve sample up-to-date towards M31. We also obtained thorough coverage of the light curve before and after the eruption thanks to the long-term monitoring. We apply the nova taxonomy proposed by Strope et al. (2010) to our nova candidates and found 29 S-class novae, 10 C-class novae, 2 O-class novae and 1 J-class nova. We have investigated the universal decline law advocated by Hachichu and Kato (2006) on the S-class novae. In addition, we correlated our catalogue with the literature and found 4 potential recurrent novae. Part of our catalogue has been used to search for optical counter-parts of the super soft X-ray sources detected in M31 (Pietsch et al. 2005). Optical surveys like WeCAPP, and coordinated with multi-wavelength observation, will continue to shed light on the underlying physical mechanism of novae in the future.

15 pages, 15 figures, 7 tables, A&A accepted for publication. The appendix is stored in the Data Conservancy

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• Recurrent Novae in M31
• On a century of extragalactic novae and the rise of the rapid recurrent novae
• X-ray source variability study of the M 31 central field using Chandra HRC-I
• Supersoft X-rays reveal a classical nova in the M 31 globular cluster Bol 126
• On the progenitors of Local Group Novae - I. The M31 Catalog
• Novae in Globular Clusters
• Constraining the role of novae as progenitors of Type Ia Supernovae
• Long-term photometric study of a faint W UMa binary in the direction of M31
• Never bet against Einstein
• Exploring the archives: A search for novae in UVIT snapshots of M31
• The first orbital period of a very bright and fast Nova in M31: M31N 2013-01b