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Asiago spectral identification of the Bright Optical Transient ASASSN-13bz near M31 discovered by ASAS-SN (ATel #5267)

ATel #5274; L. Tomasella, A. Pastorello, S. Benetti, E. Cappellaro, P. Ochner, M. Turatto (INAF Osservatorio Astronomico di Padova)
on 13 Aug 2013; 21:17 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Lina Tomasella (lina.tomasella@oapd.inaf.it)

Subjects: Optical, Cataclysmic Variable

We report that an optical spectrogram of the transient ASASSN-13bz (ATel #5267) near M31 obtained on Aug 13.05 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 340-820 nm; resolution 1.3 nm), shows a blue continuum with clear absorptions lines of the Balmer series at redshift zero, as described in ATel #5273, in which we can detect emission cores, clearly visible in Halpha. This is a typical feature of dwarf novae following outburst and an indication of a thick accretion disk. An absorption feature of NaD is also detected. Asiago classification spectra are posted at URL http://graspa.oapd.inaf.it