Spectroscopic classification of five supernovae at Asiago
ATel #4230; L. Tomasella, A. Pastorello, S. Valenti, S. Benetti, E. Cappellaro, M. Turatto, P. Ochner (Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica)
on 30 Jun 2012; 06:37 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)
Subjects: Optical, Supernovae
We report the spectroscopic confirmations of four transients on observations taken with the 1.82-m Copernico Telescope (+ AFOSC; range 340-820 nm, resolution 2.4 nm). A spectrogram of PSN J18181880+4741542, obtained on Jun. 28.90 UT suggests that this is a normal type-Ia supernova. Adopting for the host galaxy CGCG 254-030 NED02 a redshift z = 0.037 (SDSS 2004, via NED) the comparison with a library of supernovae spectra via GELATO (Harutyuyan et al. 2008, A.Ap. 488, 383) shows that it is an
event similar to the type Ia SN 1994D (Patat, F. etal , 1996 MNRAS, 278, 111) at maximum light.
A spectrogram of MASTER J22150532+1018126 obtained on Jun. 29.98 UT indicates that this is a type-Ia supernova. Cross-correlation with a library of supernova spectra via the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that it is similar to several Ia-normal SNe few days after maximum at a redshift around z=0.09.
A spectrogram of PSN J17481875+5218023 obtained on Jun. 30.06 UT indicates that this is a type-Ia supernova. Cross-correlation with a library of supernova spectra via the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that it is similar to several Ia-normal SNe soon after maximum at a redshift around z=0.07
A spectrogram of PSN J10571646+2832217 obtained on Jun. 29.86 UT suggests that this is a normal type-Ia supernova.
Adopting for the host galaxy PGC 32926 a redshift z = 0.045739 (SDSS 2007, via NED) the comparison with a library of supernovae spectra via GELATO (Harutyuyan et al. 2008, A.Ap. 488, 383) shows that it is an event similar to the type Ia SN 1994D (Patat, F. etal , 1996 MNRAS, 278, 111) at about 10 days after maximum.
A spectrogram of CSS120614:140807+580308 obtained on Jun. 30.01 UT suggests that this is a normal type-Ia supernova.
Cross-correlation with a library of supernova spectra via the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that it is similar to several Ia-normal SNe at about ten days after maximum at a redshift ~0.070.
