Minutes-duration optical flares with supernova luminosities

Anna Y.Q. Ho*, Daniel A. Perley, Ping Chen, Vik Dhillon, Harsh Kumar, Aswin Suresh, Vishwajeet Swain, Michael Bremer, Stephen J. Smartt, Joseph P. Anderson, G. C. Anupama, Supachai Awiphan, Sudhanshu Barway, Eric C. Bellm, Sagi Ben-Ami, Varun Bhalerao, Thomas de Boer, Thomas G. Brink, Rick Burruss, Poonam ChandraTing Wan Chen, Wen Ping Chen, Jeff Cooke, Michael W. Coughlin, Kaustav K. Das, Andrew J. Drake, Alexei V. Filippenko, James Freeburn, Christoffer Fremling, Michael D. Fulton, Avishay Gal-Yam, Lluís Galbany, Hua Gao, Matthew J. Graham, Mariusz Gromadzki, Claudia P. Gutiérrez, K. Ryan Hinds, Cosimo Inserra, Nayana A J, Viraj Karambelkar, Mansi M. Kasliwal, Shri Kulkarni, Tomás E. Müller-Bravo, Eugene A. Magnier, Ashish A. Mahabal, Thomas Moore, Chow Choong Ngeow, Matt Nicholl, Eran O. Ofek, Conor M.B. Omand, Francesca Onori, Yen Chen Pan, Priscila J. Pessi, Glen Petitpas, David Polishook, Saran Poshyachinda, Miika Pursiainen, Reed Riddle, Antonio C. Rodriguez, Ben Rusholme, Enrico Segre, Yashvi Sharma, Ken W. Smith, Jesper Sollerman, Shubham Srivastav, Nora Linn Strotjohann, Mark Suhr, Dmitry Svinkin, Yanan Wang, Philip Wiseman, Avery Wold, Sheng Yang, Yuhan Yao, David R. Young, Wei Kang Zheng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In recent years, certain luminous extragalactic optical transients have been observed to last only a few days 1. Their short observed duration implies a different powering mechanism from the most common luminous extragalactic transients (supernovae), whose timescale is weeks 2. Some short-duration transients, most notably AT2018cow (ref. 3), show blue optical colours and bright radio and X-ray emission 4. Several AT2018cow-like transients have shown hints of a long-lived embedded energy source 5, such as X-ray variability 6,7, prolonged ultraviolet emission 8, a tentative X-ray quasiperiodic oscillation 9,10 and large energies coupled to fast (but subrelativistic) radio-emitting ejecta 11,12. Here we report observations of minutes-duration optical flares in the aftermath of an AT2018cow-like transient, AT2022tsd (the ‘Tasmanian Devil’). The flares occur over a period of months, are highly energetic and are probably nonthermal, implying that they arise from a near-relativistic outflow or jet. Our observations confirm that, in some AT2018cow-like transients, the embedded energy source is a compact object, either a magnetar or an accreting black hole.

Original languageEnglish
Pages (from-to)927-931
Number of pages5
JournalNature
Volume623
Issue number7989
Early online date15 Nov 2023
DOIs
Publication statusPublished - 30 Nov 2023

All Science Journal Classification (ASJC) codes

  • General

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