Ultraviolet to Infrared Spectroscopy of the Type Ibn SN 2023tsz Suggests a Lower-mass Progenitor

arXiv:2607.15342 · astro-ph.HE · Submitted 2026-07-16 · Read on arXiv

Sergiy S. Vasylyev, Griffin Hosseinzadeh, Luc Dessart, Ori Fox, David J. Sand, Alexei V. Filippenko, Qinan Wang, D. Andrew Howell, Jennifer E. Andrews, Moira Andrews, Pallas Beddow, K. Azalee Bostroem, Thomas G. Brink, Peter J. Brown, Asia deGraw, Yize Dong, Joseph Farah, Thomas R. Geballe, Sebastian Gomez, Emily T. Hoang, Brian Hsu, Saurabh W. Jha, Patrick Kelly, Curtis McCully, Darshana Mehta, Megan Newsome, Yuan Q. Ni, Seong Hyun Park, Jeniveve Pearson, Neil Pichay, Justin Pierel, Aravind P. Ravi, Nicolas E. Meza Retamal, Melissa Shahbandeh, Manisha Shrestha, Nathan Smith, Bhagya M. Subrayan, Tamás Szalai, Stefano Valenti, Schuyler D. Van Dyk, Jeonghee Rho, Kathryn Wynn, Yi Yang, Yossef Zenati, WeiKang Zheng

astro-ph.HE

Submitted: 2026-07-16

Comments: Submitted to ApJ

Code: https://github.com/svalenti/FLOYDS

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Calibration — 9× in this paper · explained in 7 episodes
• Metallicity — 9× in this paper · explained in 3 episodes
• Core — 8× in this paper · explained in 2 episodes
• Abundance — 6× in this paper · explained in 1 episode
• Elias — 4× in this paper · explained in 2 episodes
• Las Cumbres Observatory — 4× in this paper
• Hubble Space Telescope — 3× in this paper
• Devasthal Optical Telescope — 1× in this paper
• Gravitational-wave Optical Transient Observer — 1× in this paper
• Himalayan Chandra Telescope — 1× in this paper
• Himalayan Faint Object Spectrograph Camera — 1× in this paper
• Large Binocular Telescope — 1× in this paper
• National Science Foundation — 1× in this paper

Sources

• The Pan-STARRS1 Surveys
• Spectral Diversity in Type Ibn Supernovae and the Large Host Offset of SN2024acyl
• SN 2021csp -- the explosion of a stripped envelope star within a H and He-poor circumstellar medium
• ASAS-SN Sky Patrol V2.0
• Early-Time Ultraviolet Spectroscopy and Optical Follow-up Observations of the Type IIP Supernova 2021yja

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