Asiago spectroscopic classification of four transients
ATel #12551; S. Schuldt, C. Vogl, S. Taubenberger (MPA, Garching), A. Fiore, S. Benetti, E. Cappellaro, L. Tomasella, M. Turatto (INAF OAPd)
on 6 Mar 2019; 10:07 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 AT2019bea, AT2019bmj, AT2019bas and AT2019blp. 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
ATLAS19dlo | SN2019bea | SDSS J102208.88-023244.2 | 2019-02-26 10:45:07 | 2019-03-05 22:06:23 | 0.068 | Ia | -5d | (1)
ATLAS19dsm | SN2019bmj | SDSS J144110.10+390421.1 | 2019-03-04 14:51:21 | 2019-03-05 03:07:30 | 0.0538 | blue continuum | - | (2)
ZTF19aakpcfy | SN2019bas | SDSS J162651.99+292314.1 | 2019-02-24 12:02:36 | 2019-03-06 04:06:46 | 0.078316 | Ia | at max | (3)
ZTF19aalryov | SN2019blp | SDSS J163425.34+113648.9 | 2019-03-01 11:29:45 | 2019-03-06 04:37:37 | 0.050085 | Ia | +3d | (4)
(1) Spectrum similar to several type Ia SNe, few days before maximum light. The redshift z=0.068 for the host galaxy is derived from SNID/GELATO SN template fitting (photoZ ~0.11 is reported in SDSS DR15). Using the SNID/GELATO redshift, an expansion velocity of about 10500 km/s is derived from the SiII 635.5 nm minimum.
(2) The Asiago spectrum shows a blue, featureless continuum, from which we derived a black-body temperature of about 14800 K. The redshift is deduced from the position of the narrow emission lines of the host galaxy.
(3) Spectrum similar to normal type Ia SNe, around maximum light. The redshift of the host galaxy is reported in SDSS DR4, 2005 (via NED). Using this redshift, an expansion velocity of about 12000 km/s is derived from the SiII 635.5 nm minimum.
(4) Spectrum similar to normal type Ia SNe, few days after maximum light. The redshift of the host galaxy is reported by Almeida et al. 2011, ApJ 735, 125 (via NED). Using this redshift, an expansion velocity of about 10200 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.
