Gamma-Ray Burst Optical/Near-Infrared Detector

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"Grond" redirects here. For J. R. R. Tolkien's fictional battering ram, see List of Middle-earth weapons and armour § Grond.
"A photograph of the GROND instrument"
GROND mounted on the MPG/ESO telescope (a dark blue cylinder at the lower left)

The Gamma-Ray Burst Optical/Near-Infrared Detector (GROND) is an imaging instrument used to investigate Gamma-Ray Burst afterglows and for doing follow-up observations on exoplanets using transit photometry.[1][2][3] It is operated at the 2.2-metre MPG/ESO telescope at ESO's La Silla Observatory in the southern part of the Atacama desert, about 600 kilometres north of Santiago de Chile and at an altitude of 2,400 metres.


  • On 13 September 2008, Swift detected gamma-ray burst 080913. GROND and VLT subsequently placed the GRB at 12.8 Gly distant, making it the most-distant GRB observed, as well as the second-most-distant object to be spectroscopically confirmed.[4][5]
  • On 15 September 2008, NASA's Fermi Gamma-ray Space Telescope detected gamma-ray burst 080916C. On 19 February 2009, NASA announced that the GROND team's work shows that the GRB was the most energetic yet observed, and 12.2 Gly distant.[6][7]

See also[edit]


  1. ^ Snellen, I. A. G.; Koppenhoefer, J. (2008). "OGLE2-TR-L9b: an exoplanet transiting a rapidly rotating F3 star" (PDF). Astronomy & Astrophysics. doi:10.1051/0004-6361/200810917. 
  2. ^
  3. ^ "GROND Takes Off" (Press release). European Organisation for Astronomical Research in the Southern Hemisphere (ESO). 2007-07-06. Retrieved 2009-02-23. 
  4. ^ "NASA's Swift Catches Farthest Ever Gamma-Ray Burst" (Press release). NASA. 2008-09-19. Retrieved 2009-02-23. 
  5. ^ Greiner, Jochen; et al. (2008-10-13). "GRB 080913 at redshift 6.7". arXiv:0810.2314. 
  6. ^ "NASA's Fermi Telescope Sees Most Extreme Gamma-ray Blast Yet" (Press release). NASA. 2009-02-19. Retrieved 2009-02-23. 
  7. ^ Greiner, Jochen; et al. (2009-02-04). "The redshift and afterglow of the extremely energetic gamma-ray burst GRB 080916C". arXiv:0902.0761. 

External links[edit]