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 whose afterglow was detected in the infrared and enabled astronomers to determine that its redshift is z = 8.2, making it one of the most distant objects detected at that time with a spectroscopic redshift (GN-z11, discovered in 2016, has a redshift of 11).
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, enable follow-up study of the event.
The finite speed of light means that GRB 090423 is also one of the earliest objects 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.
GRB090423 was a gamma-ray burst (GRB) detected by the Swift Gamma-Ray Burst Mission on April 23, 2009, at 07:55:19 UTC whose afterglow was detected in...
Cnn.com. 2009-04-29. Retrieved 2010-10-22. Krimm, H.; et al. (2009). "GRB090423: Swift detection of a burst". GCN Circulars. 9198: 1. Bibcode:2009GCN...
ability to detect stars with a telescope. 630 million years (z=8.2): GRB090423, the oldest gamma ray burst recorded suggests that supernovas may have...
News". Sol Station: Gamma-Ray Bursts 000131 - 090423. Retrieved 2010-02-23. "More Observations of GRB090423, the Most Distant Known Object in the Universe"...
is a galaxy classified as JADES-GS-z13-0. In 2009, a gamma ray burst, GRB090423, was found to have a redshift of 8.2, which indicates that the collapsing...
distant GRB observed (12.8 billion light-years) until the observation of GRB090423 a few months later. 23 April 2009: Swift detected GRB090423, the most...
distant-observed gamma-ray burst with a spectroscopic redshift measurement was GRB090423, which had a redshift of z = 8.2. The most distant-known quasar, ULAS...
burst GRB090423 was discovered at z=8.2, taking the title of most distant object. The next galaxy to hold the title also succeeded GRB090423, that being...
comparison, the Sun's luminosity is 3.8 × 1033 erg/s.[citation needed] GRB090423, the most distant gamma-ray burst with spectroscopic confirmation Cucchiara...
introduces the Arrow of Time and the idea of irreversible change using GRB090423 as an remnant of the early Stelliferous Era. At Kolmanskop he further...
reportedly contains Population III stars Galaxy formation and evolution GRB090423, the most distant seen, presumably from a low-metallicity progenitor Metallicity...
headed the international team that discovered the infrared afterglow of GRB090423 (detected 2009 April 23), the most distant source in the Universe recorded...
and presented their results in Nature magazine on March 9, 2006. GRB 080913 GRB090423 Most distant explosion detected, smashes previous record (SWIFT...
Records Preceded by GRB090423 Most distant known astronomical object 2015–2016 Succeeded by GN-z11 Preceded by EGS-zs8-1 Most distant known galaxy 2015–2016...
Astronomy Centre in Hawaii (JACH). The first ground based observations of GRB090423 were triggered via the eSTAR Project, with initial observations by the...
Multiple Observational Criteria: The Cases of z = 6.7 GRB 080913, z = 8.2 GRB090423, and Some Short/Hard GRBs", The Astrophysical Journal, vol. 703, pp. 1696-1724...
Geographic) 25 May Reexamination of data indicates that the gamma-ray burst GRB090423 may be the most distant single object yet detected; scientists believe...
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