Minutes-duration Optical Flares with Supernova Luminosities

Abstract

In recent years, certain luminous extragalactic optical transients have been observed to last only a few days. Their short observed duration implies a different powering mechanism from the most common luminous extragalactic transients (supernovae) whose timescale is weeks. Some short-duration transients, most notably AT2018cow, display blue optical colours and bright radio and X-ray emission. Several AT2018cow-like transients have shown hints of a long-lived embedded energy source, such as X-ray variability, prolonged ultraviolet emission, a tentative X-ray quasiperiodic oscillation, and large energies coupled to fast (but subrelativistic) radio-emitting ejecta. 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 likely 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.

79 pages, 3 figures (main text) + 7 figures (extended data) + 2 figures (supplementary information). Published online in Nature on 15 November 2023

References in corpus (39)

• The Zwicky Transient Facility: System Overview, Performance, and First Results
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• The Zwicky Transient Facility: Data Processing, Products, and Archive
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. II. UV, Optical, and Near-IR Light Curves and Comparison to Kilonova Models
• The Physics of Gamma-Ray Bursts and Relativistic Jets
• An online repository of Swift/XRT light curves of GRBs
• The Zwicky Transient Facility: Science Objectives
• Light Curves of the Neutron Star Merger GW170817/SSS17a: Implications for R-Process Nucleosynthesis
• Illuminating Gravitational Waves: A Concordant Picture of Photons from a Neutron Star Merger
• Rapidly-Evolving and Luminous Transients from Pan-STARRS1
• PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects
• ULTRACAM: an ultra-fast, triple-beam CCD camera for high-speed astrophysics
• The Zwicky Transient Facility: Observing System
• Exoplanet population inference and the abundance of Earth analogs from noisy, incomplete catalogs
• Fully-Automated Reduction of Longslit Spectroscopy with the Low Resolution Imaging Spectrometer at Keck Observatory
• The Zwicky Transient Facility Alert Distribution System
• A very luminous jet from the disruption of a star by a massive black hole
• The Koala: A Fast Blue Optical Transient with Luminous Radio Emission from a Starburst Dwarf Galaxy at $z=0.27$
• A Morphological Classification Model to Identify Unresolved PanSTARRS1 Sources: Application in the ZTF Real-Time Pipeline
• Long Term Radio Monitoring of SN 1993J
• A bright gamma-ray flare interpreted as a giant magnetar flare in NGC 253
• Theoretical Models of Optical Transients. I. A Broad Exploration of the Duration-Luminosity Phase Space
• ULTRASPEC: a high-speed imaging photometer on the 2.4-m Thai National Telescope
• Giant Flare in SGR 1806-20 and Its Compton Reflection from the Moon
• Measuring fundamental jet properties with multi-wavelength fast timing of the black hole X-ray binary MAXI J1820+070
• SN 2007bg: The Complex Circumstellar Environment Around One of the Most Radio-Luminous Broad-Lined Type Ic Supernovae
• The Konus-Wind catalog of gamma-ray bursts with known redshifts. II. Waiting mode bursts simultaneously detected by Swift/BAT
• Evidence for a Compact Object in the Aftermath of the Extra-Galactic Transient AT2018cow
• GRB070610 : A Curious Galactic Transient
• A Blast from the Pasture: Studying the environment of AT 2018cow with MUSE
• The final months of massive star evolution from the circumstellar environment around SN Ic 2020oi
• A comparative study of the strength of flickering in cataclysmic variables
• Catching jetted tidal disruption events early in millimetre
• Spectroscopic properties of the dwarf nova-type cataclysmic variables observed by LAMOST
• A code for robust astrometric solution of astronomical images
• A flash of polarized optical light points to an aspherical "cow"
• Multi-wavelength flare observations of the blazar S5 1803+784
• Unprecedented X-ray Emission from the Fast Blue Optical Transient AT2022tsd
• India's first robotic eye for time domain astrophysics: the GROWTH-India telescope

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