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Spectral ID of ASASSN-15bc and ASASSN-15bd

ATel #6956; Peter Challis, Robert Kirshner, Emilio Falco, Mike Calkins (Harvard-Smithsonian Center for Astrophysics)
on 19 Jan 2015; 21:18 UT
Credential Certification: Peter Challis (pchallis@cfa.harvard.edu)

Subjects: Optical, Supernovae

Referred to by ATel #: 7351

Spectra (range 350-760 nm) of ASASSN-15bc and ASASSN-15bd were obtained on Jan 19, 2015 UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST). Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows ASASSN-15bc is a normal Ia at a phase of -5 days before maximum brightness. The best match for ASASSN-15bd is type IIb sn2008ax at an early phase.