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- GRB_090423 abstract "GRB 090423 was a gamma-ray burst (GRB) detected by the Swift Gamma-Ray Burst Mission on April 23, 2009 at 07:55:19 UTC. The afterglow of GRB 090423 was detected in the infrared, and allowed astronomers to determine that the redshift of GRB 090423 is z = 8.2, which makes GRB 090423 the most distant object detected to date with a spectroscopic redshift.A gamma-ray burst is an extremely luminous event flash of gamma rays that occurs as the result of an explosion, and is thought to be associated with the formation of a black hole. The burst itself typically only lasts for a few seconds, but gamma-ray bursts frequently produce an "afterglow" at longer wavelengths that can be observed for many hours or even days after the burst. Measurements at these wavelengths, which include X-ray, ultraviolet, optical, infrared, and radio, allow follow up study of the event.The finite speed of light means that GRB 090423 is also the earliest object ever detected, for which a spectroscopic redshift has been measured. The universe was only 630 million years old when the light from GRB 090423 was emitted, and its detection confirms that massive stars were born and dying even very early on in the life of the universe. GRB 090423 and similar events provide a unique means of studying the early universe, as few other objects of that era are bright enough to be seen with today's telescopes.".
- GRB_090423 thumbnail Most_distant_Gamma-ray_burst.jpg?width=300.
- GRB_090423 wikiPageExternalLink 9202.gcn3).
- GRB_090423 wikiPageExternalLink 9209.gcn3).
- GRB_090423 wikiPageExternalLink 9213.gcn3).
- GRB_090423 wikiPageExternalLink 146234&art_pos=1.
- GRB_090423 wikiPageExternalLink swift.gsfc.nasa.gov.
- GRB_090423 wikiPageExternalLink ?ra=9.9259&de=18.148207&zoom=11&img_source=SDSS&img_id=905261:905262:all&img_borders=905261:905262.
- GRB_090423 wikiPageExternalLink watch?v=vKfmGQ_SqJA.
- GRB_090423 wikiPageID "22549887".
- GRB_090423 wikiPageRevisionID "641316254".
- GRB_090423 caption "Artist’s impression of the gamma-ray burst".
- GRB_090423 detected "2009-04-23".
- GRB_090423 detected "475.0".
- GRB_090423 detectedBy Swift_Gamma-Ray_Burst_Mission.
- GRB_090423 distLy "3.0E10".
- GRB_090423 duration "10.0".
- GRB_090423 hasPhotoCollection GRB_090423.
- GRB_090423 name "GRB 090423".
- GRB_090423 title List_of_gamma-ray_bursts.
- GRB_090423 title List_of_the_most_distant_astronomical_objects.
- GRB_090423 years "2009".
- GRB_090423 z "8".
- GRB_090423 subject Category:Astronomical_objects_discovered_in_2009.
- GRB_090423 subject Category:Long-duration_gamma-ray_bursts.
- GRB_090423 comment "GRB 090423 was a gamma-ray burst (GRB) detected by the Swift Gamma-Ray Burst Mission on April 23, 2009 at 07:55:19 UTC.".
- GRB_090423 label "GRB 090423".
- GRB_090423 label "GRB 090423".
- GRB_090423 label "GRB 090423".
- GRB_090423 label "GRB 090423".
- GRB_090423 label "GRB 090423".
- GRB_090423 label "GRB 090423".
- GRB_090423 label "GRB 090423".
- GRB_090423 label "GRB 090423".
- GRB_090423 label "GRB 090423".
- GRB_090423 label "GRB 090423".
- GRB_090423 label "GRB 090423".
- GRB_090423 sameAs GRB_090423.
- GRB_090423 sameAs GRB_090423.
- GRB_090423 sameAs GRB_090423.
- GRB_090423 sameAs GRB_090423.
- GRB_090423 sameAs GRB_090423.
- GRB_090423 sameAs GRB_090423.
- GRB_090423 sameAs GRB_090423.
- GRB_090423 sameAs m.05zrt2s.
- GRB_090423 sameAs Q651790.
- GRB_090423 sameAs Q651790.
- GRB_090423 wasDerivedFrom GRB_090423?oldid=641316254.
- GRB_090423 depiction Most_distant_Gamma-ray_burst.jpg.
- GRB_090423 isPrimaryTopicOf GRB_090423.
