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Spectroscopic Classifications of 7 Optical Transients

ATel #7087; I. Shivvers, A. V. Filippenko (UC Berkeley)
on 17 Feb 2015; 06:54 UT
Credential Certification: Isaac Shivvers (ishivvers@berkeley.edu)

Subjects: Optical, Supernovae, Transient

We report the classification of seven new optical transients based upon spectra (330-1000 nm) obtained on February 15 and 16 UT with the 3-m Shane reflector (+ Kast) at Lick Observatory. Classifications were performed though cross-correlation with a library of supernova spectra using the "SuperNova IDentification" code (SNID; Blondin & Tonry 2007, Ap.J. 666, 1024), and host-galaxy information was retrieved through the NASA/IPAC Extragalactic Database (NED).

 
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Name                 | Host             | z     | Type    |Phase (d) | Discovery | Notes 
ASASSN-15db          | NGC 5996         | 0.011 | Ia-norm | -6       | ATel #7078| 1 
GAIA 15aay           | 2MASX J1547+7158 |~0.023 | IIP     | ~0       | GAIA Alert| 2 
GAIA 15aba           | MCG +09-26-049   | 0.046 | Ia-norm | +12      | GAIA Alert| 3 
GAIA 15abu           | hostless         |~0.075 | Ia-pec  | +10      | GAIA Alert| 4 
GAIA 15aby           | KUG 1416+109     | 0.079 | Ia-norm | +6       | GAIA Alert| 5 
PSN J11495885+2119018| NGC 3910         | 0.026 | Ia-91bg | +2       | CBAT TOCP | 6 
PSN J10234760+3348477| UGC 5623         | 0.034 | IIb?    | young    | CBAT TOCP | 7 
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1) Si II 635.5 nm velocity ~11,000 km/s. In agreement with ATel #7086. 
2) Redshift determined by SNID. 
3) Si II 635.5 nm velocity ~9,000 km/s. Uncertain age; much host-galaxy contamination. 
4) Good match to SN 2006gz at +9 days. Redshift determined by SNID. 
5) Si II 635.5 nm velocity ~10,500 km/s. 
6) Si II 635.5 nm velocity ~10,000 km/s. 
7) Strong blue continuum.  After correcting for Milky Way reddening (E(B-V) = 0.02 mag),  
   spectrum is well described by a ~20,000 K blackbody. 
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