Spectroscopic classification of four transients at Asiago
ATel #3983; L. Tomasella, S. Valenti, A. Pastorello, S. Benetti, P. Ochner (Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova)
on 20 Mar 2012; 13:35 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)
Subjects: Optical, Supernovae, Transient
We report the spectroscopic confirmations of four transients on observations taken with the 1.82-m Copernico Telescope (+ AFOSC; range 340-790 nm, resolution 2.2 nm).
A spectrogram of PSN J03085209+1718032, obtained on Mar. 16.79 UT, indicates that it 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 SNe Ia-normal around maximum.
A spectrogram of the supernova discovered by Catalina Real-Time Transient Survey CSS120224:094326-065336, obtained on Mar. 16.85 UT, indicates that it 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 SNe Ia, about one month after maximum.
A spectrogram of the supernova discovered by Catalina Real-Time Transient Survey CSS120218:111158+294206, obtained on Mar. 16.87 UT, indicates that it 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 SNe Ia-normal, about one month after maximum.
A spectrogram of the candidate CSS120221:112052+513230, discovered by the Catalina Real-Time Transient Survey, obtained on Mar. 16.94 UT, indicates that it is a type-Ia supernova. ÃÂ 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 the type Ia SN 1998aq about 20 days after the B-band maximum.
