DRAFT
2025-11-12 21:07:59
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.320....1A
SN 2024qiw as a Possible iPTF14hls-like Supernova
Authors: Iair Arcavi (TAU), Erez Zimmerman (WIS), Joseph Farah (UCSB/Las Cumbres), Paul Groot (Radboud)
Abstract:
Based on multiple photometric peaks and a non-nebular Type II spectrum we suggest that SN 2024qiw is an iPTF14hls-like supernova, now ~500-600 days from explosion.

We noticed a re-brightening of the Type II SN 2024qiw (discovered by ATLAS, Tonry et al. 2024, TNSTR 2024-2625; classified by Martin et al. 2024, TNSCR 2024-2690) in the BlackGEM survey (Groot et al. 2024, PASP, 136, 5003) roughly 500 days after discovery. BlackGEM photometry and ATLAS (Tonry et al. 2018, PASP, 130, 4505) forced photometry (Shingles et al. 2021, TNSAN, 7, 1) display multiple peaks before the current re-brightening.

We obtained a spectrum of SN 2024qiw with the Floyds instrument on the Las Cumbres 2m Faulkes Telescope North in Haleakala, Hawaii. The spectrum show strong Balmer lines, mostly in emission, but with an underlying continuum and some absorption features as well. 

Both the photometric and spectroscopic behavior are rare for Type II SNe but are similar to those of the peculiar SN iPTF14hls (Arcavi et al. 2017, Nature, 551, 210).

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 2024qiw 04:52:54.700 -05:32:04.13 SN II 0.01 04:52:54.700 -05:32:04.13 SN II-pec 0.0094

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