Spectroscopic Classification of SN2020qdi as a Type Ia Supernova
ATel #13929; H. J. Abbot, B. E. Tucker, C. Lidman (Mt Stromlo Observatory, Australian National University), R. Ridden-Harper, Q. Wang, A. Rest (Johns Hopkins), P. M. Garnavich (Notre Dame)
on 10 Aug 2020; 01:39 UT
Credential Certification: Brad Tucker (brad@mso.anu.edu.au)
We report spectroscopic confirmation of 2020qdi as a SN Ia around max using the Wide Field Spectrograph (WiFeS - Dopita et al., 2007, ApSS, 310, 255) on the ANU 2.3m telescope at Siding Spring Observatory, NSW Australia, using the B3000/R3000 gratings (3500-9800 A, 1 A resolution). The IFU data was recorded on 2020-08-02, from which we measure a redshift of 0.065 from the host galaxy spectrum. Classification was made with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) which gave fits to several type Ia templates around maximum, with the best match occurring around +5 days after maximum light. Last non-detection of this object from ATLAS (Tonry et al., 2018, Publ. Astr. Soc. Pacific, 139, 478) was recorded 2020-07-03, with first detection being 2020-07-23. Based off this estimate of t_max, TESS (Ricker et al., 2015, JATIS, 1, 014003) may have captured the early light curve in sector 27, camera 1.
