AstroNote 2020-259

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2020-12-16 20:55:41
Type: Object/s-Discovery/Classification
adH0cc spectroscopic classification of SN 2020acei
Authors: S. Taubenberger, G. Csoernyei, C. Vogl, A. Floers, M. G. Cudmani, A. Holas, W. Hillebrandt, S. H. Suyu (MPA Garching), B. Leibundgut, J. Spyromilio (ESO), S. J. Smartt, M. Dobson (QUB), R. Kotak (Turku), R. Bruch, A. Gal-Yam (Weizmann), C. Lemon (Lausanne)
Source Group: adH0cc
We have obtained an optical spectrum of SN 2020acei, which shows it to be a Type Ia supernova 4 to 6 days before maximum brightness.

The adH0cc programme for an "accurate determination of H0 with core-collapse supernovae" reports the classification of the optical transient SN 2020acei. The target was supplied by the Zwicky Transient Facility ZTF (Kulkarni 2018, 2018ATel11266....1K). The observations were performed  on the night of 2020 December 15 with the ESO Very Large Telescope UT1, equipped with the FORS2 spectrograph and grism 300V, covering a wavelength range from 3400 to 9600 Å at a resolution of 10 Å.

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftSourcePhaseRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2020acei [ZTF20acwpfvq]09:44:05.626-18:11:31.80SN Ia0.082WISEA J094405.60-181129.60.082ZTF-5dThe spectrum is similar to those of normal Type Ia supernovae. According to GELATO (Harutyunyan et al., 2008), the spectrum is most similar to that of SN 2003kf 4 to 6 days before maximum. The redshift was determined from faint O III and H alpha emission of the host galaxy.09:44:05.629-18:11:31.53SN Ia0.082