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High Energy Transient Explorer 2

HETE-2 was an MIT-led international Explorer observatory built to detect gamma-ray bursts, determine their positions aboard the spacecraft, and distribute coordinates quickly enough for follow-up observations. Its three instruments observed gamma rays and soft-to-medium X-rays, while a global alert network relayed localizations to ground and space observatories.

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Identity

Aliases
HETE-2HETE IIExplorer 79
Name
High Energy Transient Explorer 2
Slug
high-energy-transient-explorer-2
Status
completed

Details

Astronauts
-
Description
HETE-2 was an MIT-led international Explorer observatory built to detect gamma-ray bursts, determine their positions aboard the spacecraft, and distribute coordinates quickly enough for follow-up observations. Its three instruments observed gamma rays and soft-to-medium X-rays, while a global alert network relayed localizations to ground and space observatories.
End Date
2008-03-31
Launch Site
Outcome
HETE-2 operated for more than seven years and made rapid gamma-ray-burst localization a routine observing technique. Its alerts enabled early afterglow measurements and contributed decisive observations connecting long-duration bursts with massive-star explosions and identifying counterparts to short-duration bursts.
Program
Explorer Program
Start Date
2000-10-09
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Creation Time
July 18, 2026 at 15:45:23 UTC
Updated Time
July 18, 2026 at 15:45:23 UTC

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