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ESO-NTT Large Program spectroscopic classification of SNhunt 121

ATel #4047; S. Benitez-Herrera, S. Taubenberger (Max-Planck-Institut fur Astrophysik), S. Valenti, S. Benetti, A. Pastorello (Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova)
on 16 Apr 2012; 14:24 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)

Subjects: Optical, Supernovae, Transient

We report, on behalf of a larger collaboration, that a spectrogram of SNhunt121 (PSN J06424255-2726498), obtained on Apr. 14.02 UT with the European Southern Observatory's New Technology Telescope (+ EFOSC2; range 365-930 nm; resolution 1.8 nm), shows it to be a peculiar type-Ic supernova. The best matches to this spectrum found by GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383; available at https://gelato.tng.iac.es/login.cgi) suggest that SNhunt121 is a few weeks after maximum light. There are prominent O I and Ca II lines, but also several unidentified features. There is no clear evidence for the presence of H or He lines. The redshift of host galaxy, NGC 2272, is z = 0.007 (Wegner et al. 2003, AJ 126,2268; via NED).