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Spectroscopic classification of ASASSN-13bz and ASASSN-13ca

ATel #5273; J. L. Prieto (Princeton), B. J. Shappee, K. Z. Stanek, C. S. Kochanek, T. W-S. Holoien, J. Jencson, U. Basu, J. F. Beacom (Ohio State), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), M. Dubberley, M. Elphick, S. Foale, E. Hawkins, D. Mullens, W. Rosing, R. Ross, Z. Walker (Las Cumbres Observatory), J. Brimacombe (Coral Towers Observatory)
on 13 Aug 2013; 20:15 UT
Credential Certification: Jose L. Prieto (jose@obs.carnegiescience.edu)

Subjects: Optical, Cataclysmic Variable, Transient

Referred to by ATel #: 5274

We obtained low-resolution optical spectra of the bright transients ASASSN-13bz (ATel #5267) and ASASSN-13ca (see the ASAS-SN transient list) on UT 2013 August 13.2 with DIS mounted on the APO 3.5m telescope. The spectra (range 3500-9600 Angs., FWHM resolution ~7 Angs.) show a blue continuum and broad Hydrogen lines in absorption at z=0, as well as weak He I 4471 in absorption. The spectrum of ASASSN-13ca also shows a weak double-peaked emission profile on top of the H-alpha line. These features are characteristic of hydrogen-rich dwarf novae in outburst (e.g., ATel #5195).