AstroNote 2021-63

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2021-02-12 18:27:26
Type: Object/s-Discovery/Classification
adH0cc spectroscopic classification of SN 2021cdw
Authors: C. Vogl, A. Floers, S. Taubenberger, G. Csoernyei, 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), S. Blondin (CNRS, LAM)
Source Group: adH0cc
We have obtained an optical spectrum of SN 2021cdw, which shows it to be a young Type II supernova.

The adH0cc programme for an "accurate determination of H0 with core-collapse supernovae" reports the classification of the optical transient {SN 2021cdw}. The target was supplied by the Zwicky Transient Facility ZTF (Kulkarni 2018, 2018ATel11266....1K) and the ATLAS survey (Tonry et al. 2018, 2018PASP..130f4505T). The observations were performed on the night of 2021 February 11 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
TNS2021cdw [ZTF21aaigdly]14:05:31.803-25:21:54.46SN II0.03969ESO 510-610.03969ZTF, ATLAS6dThe spectrum is characterized by a blue continuum with weak hydrogen and helium P-Cygni lines superimposed, indicating that this object is a young Type II supernova. The phase was estimated based on the ZTF non-detection 6 days prior to the observation. We adopted the redshift of the host for the supernova redshift.14:05:31.803-25:21:54.46SN II0.03969