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Spectroscopic Classification of 4 SNe with du Pont

ATel #10970; M. R. Drout (Carnegie Obs.), J. L. Prieto (UDP/MAS), S. Dong (KIAA/PKU), B. J. Shappee (IfA Hawaii)
on 14 Nov 2017; 18:02 UT
Credential Certification: Jose L. Prieto (jose.prietok@mail.udp.cl)

Subjects: Optical, Supernovae, Transient

We obtained low-resolution optical spectra (range 3600-9600 Angs., FWHM res ~ 8 Angs.) of ASASSN-17ot/AT2017hzv (ATel #10967), ATLAS17myf/AT2017hvr, AT2017hyj (ATLAS discovery), and Gaia17cvb/AT2017hyz on UT 2017 Nov. 14 with WFCCD mounted on the du Pont 2.5m at Las Campanas Observatory. We performed cross-correlation of the spectra with a library of supernova spectra using SNID (Blondin & Tonry 2007, ApJ, 666, 1024). The results are the following:

  
SN             UT Date     Spec. Type   Phase    Redshift 
------------------------------------------------------------ 
ASASSN-17ot   Nov 14.34       Ia        -1       0.037(SN) 
AT2017hvr     Nov 14.17       Ia        -1       0.030808(NED) 
AT2017hyj     Nov 14.15       Ia         0       0.056046(NED) 
AT2017hyz     Nov 14.02       II        young    0.018036(NED)   
  
 
Gaia17cvb/AT2017hyz shows a blue continuum with Balmer (FWHM H-alpha ~ 10000 km/s) and Fe II lines, indicating a relatively young event.