GRB 090429B was a gamma-ray burst first detected on 29 April 2009, the second detected that day. Though this burst was detected in 2009, it was not until 2011 that its distance was announced. The burst had a redshift of z=9.4, becoming the most distant GRB known in May 2011, usurping GRB 090423.
On 2009 April 29, a five-second-long burst of gamma rays from the constellation Canes Venatici triggered the Burst Alert Telescope on NASA's Swift satellite. As with most gamma-ray bursts, this one, designated GRB 090429B, heralded the death of a star some 30 times the Sun's mass and the likely birth of a new black hole.
- Space Daily, Explosion Helps Researcher Spot Universe's Most Distant Object, 27 May 2011
- This article incorporates public domain material from the National Aeronautics and Space Administration document "NASA's Swift Finds Most Distant Gamma-ray Burst Yet".
|Most distant gamma-ray burst
2011 – present
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