Yi Cao, Mansi M. Kasliwal, James D. Neill, S. R. Kulkarni, Yu-Qing Lou, Sagi Ben-Ami, Joshua S. Bloom, S. Bradley Cenko, Nicholas M. Law, Peter E. Nugent, Eran O. Ofek, Dovi Poznanski, Robert M. Quimby
We present optical light curves of twenty-nine novae in M31 during the 2009
and 2010 observing seasons of the Palomar Transient Factory (PTF). The dynamic
and rapid cadences in PTF monitoring of M31, from one day to even ten minutes,
provide excellent temporal coverage of nova light curves, enabling us to record
the photometric evolution of M31 novae in unprecedented detail. We also detect
eight of these novae in the near ultraviolet (UV) band with the Galaxy
Evolution Explorer (GALEX) satellite. Novae M31N2009-10b and 2010-11a show
prominent UV emission peaking a few days prior to their optical maxima,
possibly implying aspherical outbursts. Additionally, our blue-shifted spectrum
of the recent outburst of PT And (M31N2010-12a) indicates that it is a
recurrent nova in M31 and not a dwarf nova in the Milky Way as was previously
assumed. Finally, we systematically searched for novae in all confirmed
globular clusters of M31 and found only M31N 2010-10f associated with Bol 126.
The specific nova rate in the M31 globular cluster system is thus about one per
year which is not enhanced relative to the rate outside the globular cluster
system.
View original:
http://arxiv.org/abs/1201.2393
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