SCAT classification of optical transients
ATel #12559; A V Payne, A Do, M A Tucker, B J Shappee, M E Huber
on 7 Mar 2019; 23:05 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Michael Tucker (tuckerma95@gmail.com)
Subjects: Optical, Supernovae, Transient
The Spectral Classification of Astronomical Transients (SCAT) survey (ATel #11444) presents the classification of 5 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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ATLAS19dpp SN2019big 2019-03-01 --- Ia-91T +1 (4) 0.05
ATLAS19dob SN2019bgn 2019-03-03 --- Ia-norm +3 (5) 0.05
ASASSN-19dz SN2019bjz 2019-03-03 ATel#12547 Ia-norm +4 (5) 0.03
ATLAS19dop SN2019bgs 2019-03-03 --- Ia-norm +2 (5) 0.075
ZTF19aaeoqst SN2019agi 2019-03-03 --- Ia-CSM ~+60 0.06 (1)
ZTF19aafmwfc SN2019agl 2019-03-03 --- Ia post-max 0.081 (2)
1) Spectra acquired on both 03/01 and 03/03, combined to increase SNR. Matches several Ia-CSM templates at 60-70 days after maximum.
2) Significant amount of host galaxy contamination in the spectrum. Weak SiII absorption is identified and SNID matches to a mixture of Ia-norm and Ia-91T templates. Due to the host galaxy contributions, it is difficult to distinguish between the two SN Ia sub-types.
