Spectroscopic classification of CSS150213:100134+453359 in SDSS J100134.51+453339.9
ATel #7120; Nancy Elias-Rosa, Stefano Benetti (INAF-OAPd; Italy), Michel Dennefeld (IAP; Paris), and the NEON school students: Demetra De Cicco (Naples; Italy), Paulina Sowicka (Warsaw; Poland), Ignacio Ordovas-Pascual (Santander; Spain) and Marco Cheuk-Yin Lam (Edinburgh; UK)
on 21 Feb 2015; 15:25 UT
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Credential Certification: N. Elias-Rosa (firstname.lastname@example.org)
Subjects: Optical, Supernovae
Referred to by ATel #: 7156
We report the spectroscopic observation of CSS150213:100134+453359 in SDSS J100134.51+453339.9. The observation was performed with the Asiago 1.82m Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.4 nm), equipped with the CCD Andor IKON L936.
Name | Date (UT) | z | Type | Phase |
CSS150213:100134+453359 | 20150220.05 | 0.076 | SN Ia | few days after max |
The spectrum is consistent with a type Ia supernova at a few days before the maximum light. Cross-correlation with a library of supernova spectra using the comparison tool GELATO (Harutyunyan et al. 2008, A&A, 488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024), show that it matches with SN 2006gz (Hicken et al. 2007, ApJ, 669, 17) at t = 6 days after B maximum. From the position of the minimum of the Si II 635.5 nm feature, we infer a velocity of about 11000 km/s for the ejected material (we have used z=0.076 for the host galaxy, via NED).