TRACKER-1
48.8566°N / 2.3522°E
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SW
Space telescopes·NASA / ASI / UKSA

Swift (Neil Gehrels)

ActiveLaunched in 2004·Low Earth orbit

A 'swift' observatory that automatically slews toward gamma-ray bursts in under 90 seconds, catching the most energetic phenomenon in the Universe.

Main objectives
  • Detect and localize gamma-ray bursts in real time.
  • Follow the X-ray, UV and optical afterglow.
  • Study transients and the distant Universe.
Did you know?

Swift keeps its back to Earth to watch the sky: as soon as a burst is detected it slews around and observes the afterglow within tens of seconds.

Timeline

Nov 20, 2004
Launch

Delta II lift-off from Cape Canaveral.

Dec 17, 2004
First gamma-ray burst

Detection of GRB 041217, eight weeks after launch.

Oct 16, 2017
GW170817

Follow-up of the first burst linked to a neutron-star merger.

Jan 11, 2018
Renamed Neil Gehrels Swift

Honouring its founding principal investigator.

Swift (Neil Gehrels)
Photo of Swift (Neil Gehrels)
Mission data
StatusActive
PositionLow Earth orbit
Launched in2004
TargetGamma-ray bursts and transients
Budget0.3B USD

Instruments

[03]
BAT

Wide-field gamma-ray burst detector.

XRT

X-ray telescope that pinpoints the source.

UVOT

UV/optical telescope following the afterglow.

Specifications

Mass1,470 kg
OrbitLow Earth orbit (600 km)
ResponseSlew in under 90 s

Discoveries

[01]

Official sources

NASA Swift↗