SN 2019ehk: A Double-peaked Ca-rich Transient with Luminous X-Ray Emission and Shock-ionized Spectral Features

Wynn V. Jacobson-Galán, Raffaella Margutti, Charles D. Kilpatrick, Daichi Hiramatsu, Hagai Perets, David Khatami, Ryan J. Foley, John Raymond, Sung-Chul Yoon, Alexey Bobrick, Yossef Zenati, Lluis Galbany, Jennifer Andrews, Peter J. Brown, Régis Cartier, Deanne L. Coppejans, Georgios Dimitriadis, Matthew Dobson, Aprajita Hajela, D. Andrew HowellHanindyo Kuncarayakti, Danny Milisavljevic, Mohammed Rahman, César Rojas-Bravo, David J. Sand, Joel Shepherd, Stephen J. Smartt, Holland Stacey, Michael Stroh, Jonathan J. Swift, Giacomo Terreran, Jozsef Vinko, Xiaofeng Wang, Joseph P. Anderson, Edward A. Baron, Edo Berger, Peter K. Blanchard, Jamison Burke, David A. Coulter, Lindsay DeMarchi, James M. DerKacy, Christoffer Fremling, Sebastian Gomez, Mariusz Gromadzki, Griffin Hosseinzadeh, Daniel Kasen, Levente Kriskovics, Curtis McCully, Tomás E. Müller-Bravo, Matt Nicholl, András Ordasi, Craig Pellegrino, Anthony L. Piro, András Pál, Juanjuan Ren, Armin Rest, R. Michael Rich, Hanna Sai, Krisztián Sárneczky, Ken J. Shen, Philip Short, Matthew R. Siebert, Candice Stauffer, Róbert Szakáts, Xinhan Zhang, Jujia Zhang, Kaicheng Zhang

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We present panchromatic observations and modeling of the Calcium-rich supernova (SN) 2019ehk in the starforming galaxy M100 (d≃16.2 Mpc) starting 10 hr after explosion and continuing for∼300 days. SN 2019ehk shows a double-peaked optical light curve peaking at tQ=Q3 and 15 days. The first peak is coincident with luminous, rapidly decaying Swift-XRTVdiscovered X-ray emission (Lx≃10 erg s- 41 -1at 3 days Lx∞t.3)

Original languageEnglish
Article number166
Pages (from-to)166
Number of pages1
JournalThe Astrophysical Journal
Issue number2
Publication statusPublished - 1 Aug 2020

Bibliographical note

Publisher Copyright:
© 2020 Institute of Physics Publishing. All rights reserved.


  • Supernovae
  • White dwarf stars
  • Core-collapse supernovae
  • X-ray telescopes
  • Stellar mass loss
  • Stellar phenomena
  • Transient sources
  • 1668
  • 1799
  • 304
  • 1825
  • 1613
  • 1619
  • 1851
  • Astrophysics - High Energy Astrophysical Phenomena
  • Astrophysics - Solar and Stellar Astrophysics


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