Spectroscopic classification of ASASSN-15ni as a cataclysmic variable in outburst

ATel #7854; Paolo Berardi (ARAS)
on 28 Jul 2015; 23:35 UT
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)

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We report a low-resolution optical spectrum of ASASSN-15ni (ATel #7850), obtained on 2015-07-28.929 using a 0.23-m Schmidt-Cassegrain telescope and a Lhires III spectrograph configured for low-resolution (450-715 nm, res. 1 nm). The strong blue continuum, a faint emission of H-alpha line, a narrow component in a broad absorption for H-beta line and CIII/NIII 4640 blend in emission suggest that the transient is a dwarf nova in outburst.