During the last week Chandra completed the observing schedule as planned.

A real-time procedure was executed on Jun 12 to uplink a flight software patch that updates the Low Energy Transmission Grating insertion logic to use the grating angle to declare move success instead of relying on the insert microswitch reading. This will reduce the risk of lost science if there is a recurrence of the grating microswitch not indicating fully inserted.

A Chandra press release was issued on Jun 9 describing observations of a surprisingly strong black hole jet. Scientists have discovered a very powerful jet blasting out of a black hole about 3 billion years after the Big Bang. This jet is so far away that astronomers can only detect it because its particles boost photons in the cosmic microwave background to X-ray energies. Because of this, NASA’s Chandra X-ray Observatory was able to detect this black hole and jet plus another almost equally distant black hole. For details see: https://chandra.harvard.edu/press/25_releases/press_060925.html

A Chandra image release was issued on Jun 9 describing observations of record-breaking cosmic structure. Astronomers have discovered the largest known cloud of energetic particles surrounding a galaxy cluster — spanning nearly 20 million light-years. The finding challenges long-standing theories about how particles stay energized over time. Instead of being powered by nearby galaxies, this vast region seems to be energized by giant shockwaves and turbulence moving through the hot gas between galaxies. For details see: https://chandra.harvard.edu/photo/2025/g287/

The schedule of targets for the next week is shown below and includes an observation of EXO 0748-676, which is a follow-up to a Target of Opportunity which was accepted on Apr 29.