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Spectroscopic Classification of ASASSN-16fn/AT2016coa and MASTER J202606.27-200732.6

ATel #9118; E. Falco, M. Calkins, P. Challis, R. Kirshner (Harvard-Smithsonian CfA), J. L. Prieto (UDP; MAS), K. Z. Stanek (OSU)
on 5 Jun 2016; 21:16 UT
Credential Certification: Jose L. Prieto (jose.prietok@mail.udp.cl)

Subjects: Optical, Supernovae, Transient

Optical spectra (range 350-760nm) of the supernova candidates ASASSN-16fn/AT2016coa (ATel #9081) and MASTER J202606.27-200732.6 (ATel #9056) were obtained on UT 2016 June 3 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) indicates that both objects are Type Ia SN. ASASSN-16fn/AT2016coa is a Type Ia SN near peak (best match is SN 2008S at +0 days) at z=0.02012 (from host galaxy H-alpha emission line) and MASTER J202606.27-200732.6 is a Type Ia about 2 weeks after maximum at z=0.0226 (from the SN lines).