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Asiago spectroscopic classification of eight transients

ATel #12544; C. Vogl, S. Schuldt, S. Taubenberger (MPA, Garching), A. Fiore, S. Benetti, E. Cappellaro, L. Tomasella, M. Turatto (INAF OAPd)
on 2 Mar 2019; 14:20 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 AT2019bic, AT2019axg, AT2019bak, AT2019aze, AT2019bcw, AT2019azq, AT2019bar. The targets were supplied by ZTF (see Kulkarni et al. 2018, ATel #11266) and ATLAS (see Tonry et al. 2011, PASP, 123, 58, and Tonry et al. ATel#8680) 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  
ZTF19aalcyfd| SN2019bic | UGC 05072               | 2019-02-27 05:44:09 | 2019-03-01 22:09:29 | 0.035187  | Ia    | -8d       | (1)  
ATLAS19dih  | SN2019axg | PGC 031470              | 2019-02-14 11:36:57 | 2019-03-01 22:58:22 | 0.027399  | Ia    | +3to+6d   | (2)  
ZTF19aaklquv| SN2019bak | SDSS J101331.75+293305.0| 2019-02-20 08:48:44 | 2019-03-01 23:46:06 | 0.048593  | Ia    | +2to+6d   | (3) 
ZTF19aakljys| SN2019aze | KUG 1203+381            | 2019-02-20 06:57:06 | 2019-03-01 23:58:06 | 0.043963  | Ia    | near max  | (4) 
ZTF19aaknvuh| SN2019bcw | SDSS J124520.51+420339.0| 2019-02-24 07:15:08 | 2019-03-02 02:13:06 | 0.035     | Ia    | -10d      | (5) 
ZTF18aarilmm| AT2019bjo | UGC 09288               | 2019-03-01 10:33:31 | 2019-03-02 02:24:24 | 0.017619  | Gal   |  -        | (6) 
ATLAS19dkk  | SN2019azq | LEDA 184944             | 2019-02-22 13:26:24 | 2019-03-02 03:40:53 | 0.034     | Ic-BL | after max | (7) 
ZTF19aakpcfi| SN2019bar | SDSS J162500.75+231044.7| 2019-02-24 12:02:36 | 2019-03-02 04:11:20 | 0.06321597| Ia    | ~ max     | (8) 
 

(1) Spectrum similar to those of several type Ia SNe, with a best match at 8 days before maximum light. The velocity of the ejecta, as measured from SiII 635.5 nm, is around 11200 km/s, using the redshift of the host galaxy UGC 05072 as reported in SDSS DR3, 2004 (via NED).

(2) Also reported as ZTFaahygro with discovery date 2019-02-10 UT 10:35:02. Spectrum similar to several type Ia SNe, few days after maximum. The redshift for the host galaxy PGC 031470 is reported by Huchra et al. 2012 ApJS 199, 26 (via NED). Using this redshift, an expansion velocity of about 9940 km/s is derived from the SiII 635.5 nm minimum.

(3) Spectrum similar to several type Ia SNe, few days after maximum light. The redshift for the host galaxy is reported in SDSS DR6, 2007 (via NED). Using this redshift, an expansion velocity of about 12600 km/s is derived from the SiII 635.5 nm minimum.

(4) Spectrum similar to several type Ia SNe, few days after maximum light. The redshift for the host galaxy is reported in SDSS DR5, 2006 (via NED). Using this redshift, an expansion velocity of about 10300 km/s is derived from the SiII 635.5 nm minimum.

(5) Spectrum similar to several type Ia SNe, about ten days before maximum B light. Assuming a redshift of 0.035 as derived from SNID/GELATO SN template fitting, an expansion velocity of about 12000 km/s is derived from the SiII 635.5 nm minimum.

(6) Galaxy spectrum similar to that found in the SDSS Data Release 13.

(7) The spectrum is similar to those of broad line Type Ic supernovae after maximum. The redshift has been deduced with SNID/GELATO SN template fitting.

(8) Spectrum similar to several type Ia SNe, around maximum light. The redshift for the possible host galaxy SDSS J162500.75+231044.7 is reported in SDSS DR5, 2006 (via NED). Using this redshift, an expansion velocity of about 12500 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.