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iPTF Discovery of a Nova in M31

ATel #5539; S. Tang (Caltech/UCSB), Y. Cao (Caltech), and M. M. Kasliwal (Carnegie/Princeton) on behalf of the iPTF collaboration
on 3 Nov 2013; 16:01 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Sumin Tang (tangsm@gmail.com)

Subjects: Optical, Nova, Transient

Referred to by ATel #: 5569, 5744

The intermediate Palomar Transient Factory (ATel #4807) report the discovery of a nova in M31, iPTF13dya, at RA = 00:44:23.29, Dec = +41:40:54.6. This optical transient was detected on 3 iPTF images during UT Nov 3.25 to Nov 3.32, at magnitudes R=18.5 to 18.4. Nothing was there at this location on UT Nov 2.3, and previous iPTF images (typically nightly observations), with typical limiting magnitudes R~21 mag. We obtained a spectra with Keck/DEIMOS on UT Nov 3.47. It shows strong Halpha and Hbeta emissions, with P-Cygni profile. The minimum of Halpha corresponds to an expansion velocity of 1600 km/s.