FLOYDS Classification of PSN J18134923+1314159 and ASASSN-15lx as Young Type II Supernovae
G. Hosseinzadeh, I. Arcavi, S. Valenti, C. McCully, D. A. Howell (LCOGT/UCSB)
We obtained a spectrum of PSN J18134923+1314159 (discovered by the Lick Observatory Supernova Search) on 2015 June 27.5 UT with the robotic FLOYDS instrument mounted on the Faulkes Telescope North. The spectrum displays a blue continuum with broad H-alpha and H-beta emission at redshift z=0.056. This redshift puts the supernova at an absolute magnitude of M_V ~ -18.5, which is quite luminous for Type II events, especially if young, as indicated by the blue continuum. We also obtained a spectrum of ASASSN-15lx (ATel #7719) on 2015 June 27.6 UT with the robotic FLOYDS instrument mounted on the Faulkes Telescope South. The spectrum displays a blue continuum with narrow H-alpha emission at the redshift of the proposed host galaxy (z=0.013; Kilborn et al. 2012, AJ, 124, 690). The emission line displays an intermediate-width base (~ 700-1000 km/s), indicating this may be a Type IIn event.
optical,supernovae