Du Pont Classifications of 8 ASAS-SN, ATLAS and Gaia Supernovae
ATel #11093; N. Morrell (Las Campanas Observatory), Benjamin J. Shappee (IfA, U Hawaii), Maria Drout (Hubble Fellow, Carnegie Observatories)
on 27 Dec 2017; 01:02 UT
Credential Certification: Benjamin Shappee (bshappee@obs.carnegiescience.edu)
Subjects: Optical, Supernovae
We report optical spectroscopy (range 370-910 nm) of eight supernovae discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN; Shappee et al. 2014, ApJ, 788, 48), ATLAS (Tonry et al. 2011, PASP, 123, 58) and Gaia using the du Pont 2.5-m telescope (+ WFCCD) at Las Campanas Observatory on Dec 17 through Dec 20 2016 UT. We performed a cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024). The details of the classifications are as follows:
Name TNS Name Disc. ATel Spec. Date Spec. Type SNID Phase SNID z Notes
Gaia17dhi 2017izl 2017-12-20 II +30 0.01
ASASSN-17qu 2017ixq ATel #11074 2017-12-20 Ia +9 0.08
ASASSN-17qv 2017ixu ATel #11074 2017-12-20 Ia +1 0.06
ASASSN-17qw 2017ixw ATel #11074 2017-12-20 Ia -1 0.07
ASASSN-17qy 2017iyl ATel #11074 2017-12-19 Ia 0 0.03 (1)
ASASSN-17qt 2017ixp ATel #11074 2017-12-17 II -1 0.036 (2)
ASASSN-17qx 2017iyk 2017-12-19 Ia -1 0.07
ATLAS17nhc 2017iit 2017-12-19 II +23 0.015 (3)
(1): Agrees with Padova-Asiago classification on TNS.
(2): Blue continuum with slight Balmer emission features.
(3): An early spectrum showed a featureless continuum in ATel #11014. Given the discovery data, the transient is older than the SNID phase implies.
