SCAT classification of optical transients
ATel #12636; M A Tucker, A V Payne, A Do, B J Shappee, M E Huber (IfA), K Z Stanek (OSU), D Bersier (LJMU)
on 7 Apr 2019; 16:52 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Michael Tucker (tuckerma95@gmail.com)
Subjects: Optical, AGN, Cataclysmic Variable, Star, Supernovae, Transient, Variables
The Spectral Classification of Astronomical Transients (SCAT) survey (ATel #11444) presents the classification of 16 optical transients. We report optical spectroscopy (330-970nm) taken with the University of Hawaii 88-inch (UH88) telescope using the SuperNova Integral Field Spectrograph (SNIFS, Lanz et al. 2005). Transients were classified using the SuperNova IDentification code (SNID, Blondin & Tonry 2007, ApJ, 666, 1024). When available, data and light curves from Lasair (https://lasair.roe.ac.uk/) were used. Redshifts given to 3 decimal places are from NED or derived from host galaxy emission lines, otherwise redshifts are determined using supernova lines.
Survey Name IAU Name Date Obs. Disc ATel. Type Phase Redshift Notes
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ASASSN-19hm SN2019clh 2019-04-06 ATel#12620 Ia-norm +1 (5) 0.05
ASASSN-19ii SN2019cqt 2019-04-07 --- AGN --- 0.039
ASASSN-19il AT2019cse 2019-04-06 --- Mdwarf --- ---
ASASSN-19ip SN2019cvl 2019-04-06 --- Ia-norm -3 (4) 0.024
ATLAS19els SN2019cqr 2019-04-07 --- Ic-broad +25(10) 0.1 (1)
ATLAS19emh SN2019cvu 2019-04-06 --- Ia-norm +0 (5) 0.04
ATLAS19emm SN2019cvw 2019-04-07 --- Ia-norm -5 (2) 0.06
ATLAS19esm SN2019cvz 2019-04-07 --- IIP +0 (5) 0.018
BraTS-SON-T2-005 AT2019cox 2019-04-07 --- CV --- --- (2)
Gaia19aim SN2018lmy 2019-04-07 --- IIn > +50 0.052 (3)
ZTF19aanfqug SN2019ctt 2019-04-07 --- IIn near-max 0.046
ZTF19aanfzox SN2019ctu 2019-04-07 --- Ia-norm -9 (5) 0.095
ZTF19aanqzhm SN2019cqw 2019-04-07 --- IIn +12 (3) 0.049
ZTF19aansyyn SN2019cmz 2019-04-07 --- Ia-pec near-max 0.07 (4)
ZTF19aanuhox SN2019cqd 2019-04-07 --- Ia-norm -7 (3) 0.06
ZTF19aaqzhib AT2019cvi 2019-04-06 --- AGN ---- 0.062
1) Nosiy, mostly featureless spectrum. Matches several SNID Ic-broad templates, but also provides decent matches to Ic-norm and Ia-91T-like templates. Redshift estimated from the broad spectral features.
2) Blue continuum with emission-core Balmer absoprtion plus CaII and HeI absorption.
3) Broad H and HeI P-Cygni profiles, matches several SNe IIn at phases +70-100d, consistent with the slowly-evolving light curve.
4) Similar to normal SNe Ia near maximum except the SN absoprtion lines are slightly shallower and narrower than usual, especially the SiII and CaII profiles. Possible "Super Chandrasekhar" (SC) SN Ia similar to SN2006gz, further observations are encouraged.
