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

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

2011-09-29

arxiv.org/abs/1109.6573v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

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

Scientific paper

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.

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