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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