File:A record-breaking burst (potw2313a).jpg
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[edit]DescriptionA record-breaking burst (potw2313a).jpg |
English: The circled spot in this Picture of the Week has almost disappeared. What happened? This sequence of images, taken in optical light with ESO’s Very Large Telescope, shows the gamma-ray burst GRB 221009A fading away. Gamma-ray bursts are the most luminous phenomena that we know of in the universe, and GRB 221009A is the brightest one yet as seen from Earth.The burst was detected in October 2022 by several gamma-ray space telescopes, such as NASA's Swift and Fermi and ESA’s INTEGRAL. Then, a few hours after the initial detection, ESO’s X-shooter instrument at the VLT took a spectrum, which provided the first distance measurement to the explosion of approximately 2400 million light years. Thanks to this distance measurement, a team of astronomers led by Daniele Bjørn Malesani (Radboud University, the Netherlands; DAWN/Niels Bohr Institute, Denmark) ruled out an origin in the Milky Way, although the burst is still much closer to us than typical GRBs.The distance also allowed the team to compute the intrinsic luminosity of the explosion. Despite being in our cosmic backyard, the burst is still intrinsically very luminous. It is in fact the most intense GRB for which we could measure its luminosity, and the brightest ever as seen from Earth in the 55 years since the first gamma-ray satellites were put in orbit. According to Malesani’s team, a burst so energetic and so close as this one should probably be observable once every 1000 years.A team led by Andrew Levan (also Radboud University) observed this unique explosion with JWST at longer wavelengths. Combining the X-shooter spectrum with the JWST data allows for an in-depth investigation of the nature of this unique event. |
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Date | 29 March 2023 (upload date) | ||
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Author | ESO/Malesani et al., The Stargate collaboration | ||
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This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. |
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current | 14:04, 8 April 2023 | ![]() | 1,592 × 548 (98 KB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://cdn.eso.org/images/large/potw2313a.jpg via Commons:Spacemedia |
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Credit/Provider | ESO/Malesani et al., The Stargate collaboration |
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Source | European Southern Observatory |
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Date and time of data generation | 06:00, 29 March 2023 |
Software used | Adobe Photoshop 24.2 (Windows) |
File change date and time | 15:52, 20 March 2023 |
Date and time of digitizing | 15:59, 20 March 2023 |
Date metadata was last modified | 16:52, 20 March 2023 |
Unique ID of original document | xmp.did:50e0db8a-90f5-1b48-9452-012c24fd97e6 |
Keywords | GRB 221009A |
Contact information |
Karl-Schwarzschild-Strasse 2 Garching bei München, None, D-85748 Germany |
IIM version | 4 |