GCN Circular 9664
The Swift observatory is currently experiencing an anomaly, and normal science operations have been temporarily suspended. Data on the onboard solid state recorder (SSR) were found to be corrupted starting at 1532UT on July 12. The spacecraft is still pointing as commanded. Good data are returned when the downlink is through TDRSS and when real-time data are sent to the Malindi ground station during a pass. It appears that the problem is in the writing or storage of data on the SSR. The anomaly is being worked by a group including the operations team at Penn State, the Swift project at Goddard and the General Dynamics engineering team in Gilbert, Arizona. The first step will be to fully characterize the problem, followed by efforts to restore operations of the SSR. During this time, Swift will observe targets that were being viewed prior to the anomaly. Swift will not slew to new TOOs or new GRBs. BAT will continue to detect new GRBs and transients, and will telemeter the usual messages through TDRSS to the ground for distribution by the GCN. XRT and UVOT continue to observe, but almost none of the science data are being successfully transmitted to the ground. Ground-based follow-up of BAT GRBs is strongly encouraged. More information will follow as we learn more.