DRAFT
2024-04-18 07:47:25
Type: Object/s-Discovery/Classification
Bibcode: 2024TNSAN.112....1L
Re-classification of SN2024dde as a SLSN-I
Authors: Ragnhild Lunnan, Jesper Sollerman, Priscila Pessi, Sean Brennan, Anamaria Gkini, Joel Johansson (OKC), Steve Schulze (CIERA/Northwestern), Daniel Perley, Jacob Wise (LJMU), Georgios Dimitriadis (TCD).
Source Group: ZTF
Keywords: Supernova
Abstract:
We re-classify SN2024dde as a SLSN-I based on a combination of light curve information (current rise time 65 days, absolute magnitude -19.8 mag, still rising) and spectroscopic information.

SN2024dde was originally classified as a SN Ia based on its spectrum and absolute magnitude, although with a note that the rise time was unusually long. The supernova is still rising in ZTF and ATLAS data, now for ~65 days and is currently at an absolute magnitude r = -19.8 mag, which is incompatible with a SN Ia explanation. While a spectrum obtained 2024-04-05 shows little evolution compared to the original classifiation spectrum, we note that it is an equally good match to peculiar SLSN-Ic such as SN2020wnt on the rise (see attached). Combining the light curve and spectroscopic information, we therefore re-classify this object as a SLSN-I.

We note that its luminosity lies in the boundary between typical SLSNe and luminous SNe Ic, and encourage continued follow up.

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2024dde [ZTF24aagfeti] 14:49:54.390 +13:54:02.47 SLSN-I 0.054 14:49:54.368 +13:54:02.39 SLSN-I 0.054
File Comments
public://astronotes_files/1647/SN2024dde_20wnt.png Comparison of SN2024dde with SN2020wnt at 15 days before peak.

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