Spectroscopic Classification of ASASSN-14ar
ATel #6105; A. Mosquera, K. Z. Stanek, T. W-S. Holoien, B. J. Shappee, C. S. Kochanek, J. Jencson, U. Basu, B. Davis, J. F. Beacom (Ohio State), J. L. Prieto (Princeton), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), J. Brimacombe (Coral Towers Observatory), D. Bersier (LJMU)
on 29 Apr 2014; 14:06 UT
Credential Certification: Jose L. Prieto (jose@obs.carnegiescience.edu)
Subjects: Optical, Supernovae
We obtained a low-resolution optical spectrum (range 4000-6850 Angstroms) of ASASSN-14ar (ATel #6102) on UT 2014 April 29.2 with the OSMOS spectrograph mounted on the MDM 2.4m telescope. The spectrum shows features characteristic of Type Ia SN. We used SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) to perform cross-correlation with a library of SN spectra and find that ASASSN-14ar spectrum is most consistent with sub-luminous 91bg-like SN Ia around maximum, although some normal SN Ia a few days after peak also give decent correlations (we note that the sub-class determination might be affected by strong host-galaxy contamination). After correcting for the recession velocity of the host (z=0.0229), we measure a Si II 6355 absorption velocity of -7000 km/s. This velocity is fairly low for normal and 91bg-like SNe Ia around peak (e.g., Blondin et al. 2012, AJ, 143, 126).
