GRB 090429B
| GRB 090429B | |
|---|---|
 Artist’s impression of the gamma-ray burst | |
| Detection | |
| Detection time |
05:30:03 UTC April 29, 2009 |
| Detected by | Swift |
| Duration | 5.5 seconds |
| Position | |
| Right ascension | 14h 02m 40.10s |
| Declination | +32° 10′ 14.6″ |
| Redshift | 9.06 ≤ z ≤ 9.52 |
| Energetics | |
| Total energy output | 3.5 × 1052 erg |
| See also: Gamma-ray burst, Category:Gamma-ray bursts | |
GRB 090429B was a gamma-ray burst first detected on 29 April, 2009, by the Burst Alert Telescope aboard the Swift satellite. The burst triggered a standard burst-response observation sequence, which started at 106 s after the burst. The X-ray telescope aboard the satellite identified an uncatalogued fading source. No optical or UV counterpart was seen in the UV–optical telescope. Around 2.5 hours after the burst trigger, a series of observations was carried out from Gemini North, which detected a bright object in the infrared part of the spectrum. No evidence of a host galaxy was found either by Gemini North or by HST.[1] Though this burst was detected in 2009, it was not until May 2011 that its distance estimate was announced. The burst had a photometric redshift of z=9.4,[2] which would make it the most distant GRB known,[3] although the error bar on this estimate was large, providing a lower limit of z>7.[2]
The amount of energy, released in the burst, was estimated as 3.5 × 1052 erg. For a comparison, the Sun's luminosity is 3.8 × 1033 erg/s.
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.
See also
GRB 090423, the most distant gamma-ray burst with spectroscopic confirmation
References
- ↑ Cucchiara, A.; Levan, A. J.; Fox, D. B.; Tanvir, N. R.; Ukwatta, T. N.; Berger, E.; Krühler, T.; Yoldaş, A. Küpcü; Wu, X. F.; Toma, K.; Greiner, J.; E. Olivares, F.; Rowlinson, A.; Amati, L.; Sakamoto, T.; Roth, K.; Stephens, A.; Fritz, Alexander; Fynbo, J. P. U.; Hjorth, J.; Malesani, D.; Jakobsson, P.; Wiersema, K.; O'Brien, P. T.; Soderberg, A. M.; Foley, R. J.; Fruchter, A. S.; Rhoads, J.; Rutledge, R. E.; Schmidt, B. P.; Dopita, M. A.; Podsiadlowski, P.; Willingale, R.; Wolf, C.; Kulkarni, S. R.; D’Avanzo, P. (20 July 2011). "A PHOTOMETRIC REDSHIFT OF ∼ 9.4 FOR GRB 090429B". The Astrophysical Journal 736 (1): 7. arXiv:1105.4915. Bibcode:2011ApJ...736....7C. doi:10.1088/0004-637X/736/1/7.
- 1 2 http://adsabs.harvard.edu/abs/2011ApJ...736....7C
- ↑ 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".