Asiago spectroscopic classification of MASTER OT J194310.37+554900.0, ASASSN-16je and AT2016fee

ATel #9397; L. Tomasella, S. Benetti, E. Cappellaro, N. Elias-Rosa, P. Ochner, A. Pastorello, G. Terreran, M. Turatto (INAF OAPd)
on 23 Aug 2016; 08:58 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Enrico Cappellaro (enrico.cappellaro@oapd.inaf.it)

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The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of MASTER OT J194310.37+554900.0 (Atel #9389), ASASSN-16je (aka SN2016fez) near galaxy 2MASX J17055033+6950555 and AT2016fee (aka Gaia16bbt) in the faint galaxy SDSS J233345.91+253350.7.

The observations were performed with the Asiago 1.82 m Copernico Telescope equipped with AFOSC (range 340-820 nm; resolution 1.4 nm).

 
Survey Name                  | IAU Name   | Disc. date (UT) | Disc. mag | Observation (UT) |  Type  | z    | Notes| 
MASTER OT J194310.37+554900.0|            | 2016-08-19.02   |   17.9    | 2016-08-22.91    |   CV   | -    | (1)  |  
ASASSN-16je                  | SN2016fez  | 2016-08-21.33   |   16.8    | 2016-08-22.95    |   SN Ia| 0.038| (2)  | 
Gaia16bbt                    | AT2016fee  | 2016-08-18.90   |   18.7    | 2016-08-23.08    |   -    | -    | (3)  | 

(1) The spectrum shows strong blue continuum and emission lines, at zero redshift, typical of a dwarf nova following an outburst (Szkody et al. 1990 ApJS, 73, 537; Liu et al. 1999, ApJSS 122, 243). Absorption throughs from an optically thick disk are coupled with emissions of hydrogen Balmer lines, as well as He I 447.1 nm, 587.6 nm, 667.8 nm and 706.5 nm.

(2) A good match is obtained with Type Ia SNe about one week after B-band maximum light at a redshift z~0.037. Assuming this redshift, from the position of the minimum of the Si II 635nm feature, we infer an expansion velocity of 10700 km/s for the ejected material.

(3) The low signal-to-noise spectrum shows a featureless, blue continuum. The host galaxy SDSS J233345.91+253350.7 has a photoZ=0.105+/-0.061 (SDSS DR13).

Classifications were done with GELATO (Harutyunyan et al. 2008, A&A, 488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024). The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it.