Searching for Supernovae in HETDEX Data Release 3

József Vinkó, Benjamin P. Thomas, J. Craig Wheeler, Anna Y.Q. Ho, Erin Mentuch Cooper, Karl Gebhardt, Robin Ciardullo, Daniel J. Farrow, Gary J. Hill, Zoltán Jäger, Wolfram Kollatschny, Chenxu Liu, Enikő Regős, Krisztián Sárneczky

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We have extracted 636 spectra taken at the positions of 583 transient sources from the third data release of the Hobby-Eberly Telescope Dark Energy eXperiment (HETDEX). The transients were discovered by the Zwicky Transient Facility (ZTF) during 2018-2022. The HETDEX spectra provide a potential means to obtain classifications for a large number of objects found by photometric surveys for free. We attempt to explore and classify the spectra by utilizing several template-matching techniques. We have identified two transient sources, ZTF20aatpoos = AT 2020fiz and ZTF19abdkelq, as supernova (SN) candidates. We classify AT 2020fiz as a Type IIP SN observed ∼10 days after explosion, and we propose ZTF19abdkelq as a likely Type Ia SN caught ∼40 days after maximum light. ZTF photometry of these two sources are consistent with their classifications as SNe. Beside these two objects, we have confirmed several ZTF transients as variable active galactic nuclei based on their spectral appearance, and determined the host galaxy types of several other ZTF transients.

Original languageEnglish (US)
Article number31
JournalAstrophysical Journal
Issue number1
StatePublished - Mar 1 2023

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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