Asiago spectroscopic classification of three transients
ATel #12540; S. Taubenberger, C. Vogl, S. Schuldt (MPA, Garching), A. Fiore, S. Benetti, E. Cappellaro, L. Tomasella, M. Turatto (INAF OAPd)
on 1 Mar 2019; 11:09 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)
Subjects: Optical, Supernovae
The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of AT2019bek, AT2019bdz and AT2019baq. The targets were supplied by ZTF and ATLAS surveys.
The observations were performed with the Asiago 1.82m Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.4 nm).
Survey name | IAU name | Host galaxy | Disc. Date (UT) | Obs. Date (UT) | redshift | type | phase | notes
ZTF19aajxwnz | SN2019bek | 2MASS J06173280+6229105 |2019-02-12 04:43:40 | 2019-03-01 01:54:27 | 0.015 | Ia | max | (1)
ZTF19aaksrlb | SN2019bdz | CGCG 048-018 |2019-02-25 08:35:31 | 2019-03-01 03:03:58 | 0.034683 | Ia | before max | (2)
ZTF19aakoasy | SN2019baq | 2MASX J12220157+2020300 |2019-02-24 08:58:09 | 2019-03-01 03:19:51 | 0.033493 | Ia | before max | (3)
(1) Spectrum similar to those of several type Ia SNe, around maximum light. The velocity of the ejecta, as measured from SiII 635.5 nm, is around 11000 km/s, assuming a redshift of 0.015 as derived from SNID/GELATO SN template fitting.
(2) Spectrum similar to several type Ia SNe, about one week before B maximum. The redshift for the host galaxy CGCG 048-018 is reported in SDSS DR5 , 2006 (via NED). Using this redshift, an expansion velocity of about 13000 km/s is derived from the SiII 635.5 nm minimum.
(3) Spectrum similar to several type Ia SNe, about one week before B maximum. The redshift for the host galaxy is reported by Almeida et al. 2011, ApJ 735, 125 (via NED). Using this redshift, an expansion velocity of about 14200 km/s is derived from the SiII 635.5 nm minimum.
The classification was performed using the GELATO (Harutyunyan et al. 2008, A&A, 488, 383)
and SNID (Blondin and Tonry 2007, ApJ, 666, 1024) tools.
The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it.
