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 (email@example.com)
Subjects: Optical, Supernovae
Referred to by ATel #: 9417
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.
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.