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Minutes-duration optical flares with supernova luminosities

In recent years, certain luminous extragalactic optical transients have been observed to last only a few days1. Their short observed duration implies a different powering mechanism from the most common luminous extragalactic transients (supernovae), whose timescale is weeks2. Some short-duration transients, most notably AT2018cow (ref. 3), show blue optical colours and bright radio and X-ray emission4. Several AT2018cow-like transients have shown hints of a long-lived embedded energy source5, such as X-ray variability6,7, prolonged ultraviolet emission8, a tentative X-ray quasiperiodic oscillation9,10 and large energies coupled to fast (but subrelativistic) radio-emitting ejecta11,12. 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 ....

South Korea , United States , United Kingdom , Ch Ungch Ong Bukto , Ugarte Postigo , Rivera Sandoval , International Astronomical Union , Astrophysics Source Code Library , Gildas Team , Ms High Energy Astrophysics Cambridge Univ , Thai National Telescope , Zwicky Transient Facility Bright , Spectroscopic Survey Of Transient Objects , Sloan Digital Sky , Astronomical Society Of The Pacific , Astronomical Data Analysis Software , Galactic Center , Large Array Survey Telescope , Dark Energy , Line Data Analysis Software , Discovery Report , Name Server Discovery Report , Automatic Learning , Rapid Classification , Name Server Astronote , Black Hole ,

Dr. Paul Vanden Bout Awarded the 2023 Jansky Lectureship - Allegheny Mountain Radio

Dr. Paul Vanden Bout Awarded the 2023 Jansky Lectureship - Allegheny Mountain Radio
alleghenymountainradio.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from alleghenymountainradio.org Daily Mail and Mail on Sunday newspapers.

New Mexico , United States , West Virginia , Karl Jansky , Green Bank , Green Bank Observatory , National Radio Astronomy Observatory , Green Bank Science Center , Green Bank Telescope , Paul Vanden Bout , Green Bank Observatory Thursday , Very Long Baseline Array , Expanded Very Large Array , Atacama Large Millimeter Array , Radio Astronomy , New Generation , Vanden Bout , Jansky Lecture , Solar Systems , Five Decades , Thursday November ,