Updated

Updated · The Guardian · Sep 25

Link Spacecraft Re-enters After 85-Day Failed Swift Rescue, Leaving $30 Million Telescope Mission to End

Updated

Updated · The Guardian · Sep 25

Link Spacecraft Re-enters After 85-Day Failed Swift Rescue, Leaving $30 Million Telescope Mission to End

Q: With Swift's fiery demise looming this November, what will replace its vital 22-year watch over the universe's most violent cosmic events?

There is no single direct replacement ready to take over Swift’s job this November. NASA has said it will try to cover the gap with existing missions while it looks for new rapid-response options. The nearest stand-in is NASA’s Fermi Gamma-ray Space Telescope, which is still operating and can detect gamma-ray bursts through its Gamma-ray Burst Monitor. But Fermi is not a full substitute for Swift. Swift’s unique strength has been combining wide-field burst detection with the ability to autonomously slew within about 90 seconds and observe the afterglow in X-ray, ultraviolet, and visible light from the same spacecraft. Other observatories can help, but only in pieces. ESA’s INTEGRAL remains available for gamma-ray work, while X-ray telescopes such as Chandra and XMM-Newton can do follow-up observations. Ground-based facilities are also improving their response times, and new systems like the Submillimeter Array’s rapid-response program have already demonstrated Swift-triggered follow-up within minutes. Rubin Observatory’s LSST will add major transient-alert capability, but in optical wavelengths rather than Swift’s combined gamma-ray/X-ray/UV role. In short, Swift’s science will be replaced by a network, not by one spacecraft. That means burst detection may continue, but the fast, all-in-one response Swift provided for 22 years will be hard to match until a future dedicated mission is built. NASA has not yet announced a direct successor with Swift’s full capabilities.

3 articles · Updated · The Guardian · Sep 25

Link re-entered Earth’s atmosphere Friday after 85 days in orbit, ending the commercial spacecraft’s unsuccessful attempt to raise the Neil Gehrels Swift Observatory to a safer altitude.
Electronics failures disabled two of Link’s three reaction wheels after launch, triggering motion-control and communications problems that left it unable to capture Swift despite closing to within 7 to 9 miles.
Katalyst Space Technologies had won a $30 million NASA contract in 2024 and assembled the three-armed rescue mission in 22 months, but managers abandoned the effort last month when fuel ran too low.
Swift — launched in 2004 and used for 22 years to study gamma-ray bursts and other cosmic events — is now expected to re-enter Earth’s atmosphere in November after solar activity hastened its decay.
NASA said the high-risk mission still advanced U.S. satellite-servicing capabilities and tested rapid-response operations for extending spacecraft life in low Earth orbit.