Posted Sep 01, 2023
All is back to normal and PEPSI is ready for observing in 23B after extensive work during the summer of 2023.
The two new STA1600 CCDs were integrated into the existing dewars at STA premises in California over the August …
Posted Jun 16, 2023
Resolved during SSD23: LUCI2 had a failure of its detector focus stage on June 14, 2023. Repeated attempts at restoring function have been unsuccessful. The instrument is currently offline for N1.8 & N3.75 (seeing limited and ESM) use as they …
Posted Jun 03, 2023
During the afternoon of May 25th, the SX M2 adaptive secondary (ASM) was removed and the rigid secondary installed in its place. The coating on the SX ASM had been degrading, and it is being sent to Italy for recoating. …
Posted Mar 04, 2023
Update Jan 10 2024: The issue was resolved during SSD23 and the AGw patrol field is back to the nominal area described in the LUCI pages (here). The problem was traced to the camera cable, where a couple of wires …
Posted Feb 10, 2023
Resolved with PEPSI SSD2023 upgrade and work.
Update 2023-02-10
The blue CD is degrading its operational performance: now it cannot be re-positioned from UMAC at all. It can no longer move down to CD1. It only can traverse between CD2 …
Posted Dec 20, 2022
There is an intermittent issue affecting the lower right quadrant (Q2) of MODS1B, where the counts in even and odd channels differ by hundreds of ADU (>~450 ADU). Because of the readout strategy employed: the detector is read out by …
